CN201336591Y

CN201336591Y - Motor rotor

Info

Publication number: CN201336591Y
Application number: CNU2008201810345U
Authority: CN
Inventors: 洪银树
Original assignee: Sunonwealth Electric Machine Industry Co Ltd
Current assignee: Sunonwealth Electric Machine Industry Co Ltd
Priority date: 2008-12-11
Filing date: 2008-12-11
Publication date: 2009-10-28
Anticipated expiration: 2018-12-11

Abstract

The utility model relates to a motor rotor which comprises a wheel hub, a permanent magnet and a spindle. The wheel hub is provided with an inner surface and an outer surface. An assembly hole is formed in the middle of the inner surface of the wheel hub; the permanent magnet is arranged on the inner surface annularly; the spindle is provided with two ends, wherein one end adopts a binding end, the binding end is fixed in the assembly hole of the wheel hub and is provided with a binding part, and the binding part radially extends to the outer peripheral surface of the spindle and is embedded in the wheel hub. Accordingly, the motor rotor can radially extend and allow the binding area between the wheel hub and the spindle to be increased, so as to improve good binding strength; and meanwhile, the motor has a miniature or thin design space wholly.

Description

Motor rotor

Technical field

The utility model relates to a kind of motor rotor, particularly about a kind of motor rotor that applies to miniature motor.

Background technology

With reference to shown in Figure 1, existing motor rotor 9 comprises a wheel hub 91, a permanent magnet 92 and an axle 93.These wheel hub 91 inboard central authorities have an axle bed 94, and this permanent magnet 92 is around the inner peripheral surface that is arranged at this wheel hub 91, and this axle 93 has two ends, and wherein an end is a binding end, and this binding end secure bond is in axle bed 94 central authorities of this wheel hub 91.Whereby, when the axle 93 of this rotor 9 is rotatable bearing 81 central authorities that are arranged at this motor, can be by a stator 82 to drive this rotor 9 rotary works.

Refer again to shown in Fig. 1 and 2, generally speaking, the axle 93 of existing structure, secure bond mode between the axle bed 94 of 93 ' binding end and wheel hub 91 can be divided into two kinds, the first is provided with a reducing diameter part 95 (as shown in Figure 1) at the outer peripheral face of this axle 93, it two is that outer peripheral face in this axle 93 ' is formed with embossing 96 (as shown in Figure 2), and make in the reducing diameter part 95 of this binding end or the axle bed 94 that embossing 96 is deeply buried in this wheel hub 91, make this axle 93,93 ' binding end closely secure bond in the axle bed 94 of this wheel hub 91, to prevent this axle 93,93 ' separates with wheel hub 91 or gets loose.

But along with electronic product generally towards microminiaturized trend, the motor volume also must be towards miniaturization or slimming design.Yet, under the condition that the motor whole height is restricted, this axle 93,93 ' length are fixed, so when this wheel hub 91 is provided with axle bed 94 or has bigger wall thickness when coating this axle 93,93 ' binding end, can cause this axle 93,93 ' to reduce for the distance that is arranged in bearing 81, make motor rotor 9 be easy to generate the rotation beat, if but increase this axle 93,93 ' be arranged in bearing 81 apart from the time, then can cause this wheel hub 91 can coat axle 93 again, 93 ' area is limited to.

Therefore, when axle bed 94 height of reduction existing structure wheel hub 91, will cause the bonded area between this wheel hub 91 and the axle 93 to reduce, bond strength reduces, if but do not reduce axle bed 94 height of this wheel hub 91, but limited to the miniaturization or the slimming design space of this motor integral body relatively.Therefore, above-mentioned existing structure and be not suitable for miniaturization or the slimming motor.

The utility model content

Main purpose of the present utility model provides a kind of motor rotor, and the design space of motor integral miniaturization or slimming can be provided.

Of the present utility model time a purpose provides a kind of motor rotor, makes to have good binding intensity between wheel hub and the axle.

For achieving the above object, the technological means that the utility model adopts is that a motor rotor comprises a wheel hub, a permanent magnet and an axle.This wheel hub has an inner surface and an outer surface, the inner surface central authorities of this wheel hub are provided with assembly hole, this permanent magnet is arranged at the inner surface of this wheel hub, and be around the periphery that is arranged at this assembly hole, this axle has two ends, and wherein an end is a binding end, and this binding end secure bond is in the assembly hole of this wheel hub, and this binding end is provided with conjunction, and this conjunction is the outer peripheral face that radially extends this axle, and this conjunction is deeply buried in this wheel hub.

Its useful technique effect is: have by the binding end of above-mentioned axle and be the conjunction that radially extends, and this conjunction is deeply buried in this wheel hub, so can radially extend and increase the bonded area between this wheel hub and the axle, therefore, even being provided with axle bed, this wheel hub itself can not supply stationary spindle, still have enough bond strengths between this wheel hub and the axle, separate with wheel hub or get loose to prevent this axle.

Simultaneously, this wheel hub can save the setting of axle bed, to reduce the height of this rotor, makes this motor integral body have more the design space of miniaturization or slimming.

Description of drawings

Fig. 1: first kind of existing structure applies to the profile of motor;

Fig. 2: second kind of existing structure applies to the profile of motor;

Fig. 3: the utility model first embodiment applies to the profile of motor;

Fig. 4: the partial exploded view of the utility model first embodiment axle;

Fig. 5: the part sectioned view of the utility model first embodiment;

Fig. 6: the part sectioned view of the utility model second embodiment;

Fig. 7: the utility model the 3rd embodiment applies to the profile of motor;

Fig. 8: the partial exploded view of the utility model the 3rd embodiment axle;

Fig. 9: the part sectioned view of the utility model the 3rd embodiment;

Figure 10: the part sectioned view of the utility model the 4th embodiment.

The main element symbol description:

1 rotor, 11 wheel hubs, 111 inner surfaces, 112 outer surfaces

113 assembly holes, 12 permanent magnets, 13 axles, 131 binding ends

132 conjunctions, 133 holes, 2 stators, 21 bearings

3 rotors, 31 axles, 311 conjunctions, 312 kinks

32 wheel hubs, 4 rotors, 41 wheel hubs, 411 inner surfaces

412 outer surfaces, 413 ringwalls, 42 permanent magnets, 43 axles

431 conjunctions, 432 kink 432a vertical section 432b horizontal segments

433 combined holes, 44 motor shells, 5 rotors, 51 axles

511 binding ends, 52 conjunctions, 53 conjunctions, 54 wheel hubs

541 axle beds, 81 bearings, 82 stators, 9 rotors

91 wheel hubs, 92 permanent magnets, 93 axles, 93 ' axle

96 embossings of 94 axle beds, 95 reducing diameter parts

Embodiment

For above-mentioned and other purpose of the present utility model, feature and advantage can be become apparent, preferred embodiment of the present utility model cited below particularly, and conjunction with figs. are described in detail below:

Please refer to shown in Figure 3ly, the rotor 1 of the utility model first embodiment includes a wheel hub 11, a permanent magnet 12 and an axle 13.

The two-phase respective side of this wheel hub 11 is respectively an inner surface 111 and an outer surface 112, and these wheel hub 11 central authorities are provided with an assembly hole 113.Wherein, this assembly hole 113 may be selected to be a blind hole (not illustrating), also may be selected to be the through hole (as shown in this embodiment) that is through to outer surface 112 by the inner surface 111 of this wheel hub 11.

This permanent magnet 12 is arranged at the inner surface 111 of this wheel hub 11, and preferable being around assembly hole 113 outsides that are arranged at this wheel hub 11.

With reference to shown in Fig. 3 to 5, this axle 13 has two ends, wherein an end is a binding end 131, these binding end 131 secure bond are in the assembly hole 113 of this wheel hub 11, make the other end of this axle 13 be the inner surface 111 that protrudes in this wheel hub 11, and make the end face of these axle 13 binding ends 131 be the outer surface 112 that does not protrude in this wheel hub 11.The binding end 131 of this axle 13 is provided with conjunction 132 in addition, and this conjunction 132 is the outer peripheral face that radially extends this axle 13, and this conjunction 132 is deeply buried in this wheel hub 11.Moreover, this conjunction 132 is the disc-shape that radially extends along this axle 13, and this conjunction 132 can be selected to be formed as one with the binding end 131 of this axle 13, perhaps as shown in Figure 4, also can select one hole 133 to be set in these conjunction 132 central authorities, and the binding end 131 that makes this axle 13 fixedly close-fitting be incorporated in the hole 133 of this conjunction 132.

Refer again to shown in Figure 3ly, the rotor 1 of this first embodiment can apply to the thin motor of axial air-gap, and its axle 13 with this rotor 1 is rotatable bearing 21 central authorities that are arranged at this motor, again by certain sub 2 to drive this rotor 1 rotary work.

Be the conjunction 132 that radially extends because axle 13 binding ends 131 of this first embodiment have, and this conjunction 132 is deeply buried in this wheel hub 11, so can radially extend and increase the bonded area between this wheel hub 11 and the axle 13.So, even itself being provided with axle bed, this wheel hub 11 can not supply stationary spindle 13, even wall thickness reduction of this wheel hub 11 itself, still have enough bond strengths between this wheel hub 11 and the axle 13, and separate with wheel hub 11 or get loose to prevent this axle 13.

Please refer to shown in Figure 6ly, it discloses the motor rotor of the utility model second embodiment.Compared to first embodiment, the rotor 3 of this second embodiment further is extended with kink 312 in conjunction 311 peripheries of this axle 31, this kink 312 is to tilt to stretch out, and this kink 312 can be selected to be to be tilted to also and stretch out simultaneously (not illustrating), also can select to be tilted down and to stretch out simultaneously.Whereby, can provide preferable surface aggregate power between these conjunction 311 surfaces and the wheel hub 32, make between this wheel hub 32 and the axle 31 to reach better bond strength.

Please refer to shown in Figure 7ly, it discloses the motor rotor of the utility model the 3rd embodiment.Compared to first embodiment, wheel hub 41 peripheries of this 3rd embodiment are extended with a ringwall 413 in addition towards next side, this ringwall 413 also has an inner surface 411 and an outer surface 412, and this permanent magnet 42 by a motor shell 44 around the inner surface 411 that is arranged at this ringwall 413.Whereby, the rotor 4 of this 3rd embodiment can apply to radial air gap motor.

Refer again to shown in Fig. 7 to 9, compared to second embodiment, conjunction 431 peripheries of rotor 4 axles 43 of the 3rd embodiment also are extended with kink 432, this kink 432 is continuous turnover and stretches out, this kink 432 is by the periphery of this conjunction 431 and has extended axially a vertical section 432a, again by this vertical section 432a turnover and be and radially be extended with a horizontal segment 432b.Moreover this conjunction 431 is provided with several combined holes 433, and these combined hole 433 preferable selections are arranged at the horizontal segment 432b of this kink 432.Whereby, when this conjunction 431 is deeply buried in this wheel hub 41, make between this wheel hub 41 and the axle 43 to reach better bond strength, and this combined hole 433 more can provide the secure bond of inlaying with this wheel hub 41, can avoid producing relative spinning movement between this axle 43 and the wheel hub 41.

Please refer to shown in Figure 10ly, it discloses the motor rotor of the utility model the 4th embodiment.Compared to first to three embodiment, the rotor 5 of the 4th embodiment is that the binding end 511 in this axle 51 is provided with two conjunctions 52,53, and this two conjunction 52,53 can be the combination utilization of aforementioned first to three embodiment, this the 4th embodiment is the conjunction 52,53 of combination utilization first and three embodiment, and this wheel hub 54 also can be convexly equipped with an axle bed 541 under the condition that the height space of this motor is allowed, to coat this two conjunction 52,53.Whereby, the rotor 5 of this 4th embodiment can provide better bond strength between this wheel hub 54 and the axle 51.

In sum, the utility model really can be by the bonded area of the conjunction increase that is radially extension on this axle with this wheel hub, therefore, even being provided with axle bed, this wheel hub itself can not supply stationary spindle, still have enough bond strengths between this wheel hub and the axle, to prevent that this axle from separating with wheel hub or get loose, make this motor integral body have more the design space of miniaturization or slimming simultaneously.

Claims

1, a kind of motor rotor is characterized in that, comprises:

A wheel hub has an inner surface and an outer surface, and the inner surface central authorities of this wheel hub are provided with an assembly hole;

A permanent magnet is arranged at the inner surface of this wheel hub; And

An axle has two ends, and wherein an end is a binding end, and this binding end secure bond is in the assembly hole of this wheel hub, and this binding end is provided with conjunction, and this conjunction is the outer peripheral face that radially extends this axle, and this conjunction is deeply buried in this wheel hub.

2, motor rotor according to claim 1 is characterized in that: this conjunction is provided with a hole, and the binding end of this axle penetrates this hole and fixes.

3, motor rotor according to claim 1 and 2 is characterized in that: this conjunction is the disc-shape that radially extends along this axle.

4, motor rotor according to claim 3 is characterized in that: this conjunction periphery has and is the outward extending kink that tilts.

5, motor rotor according to claim 4 is characterized in that: this kink is the direction that is tilted to and stretches out simultaneously.

6, motor rotor according to claim 4 is characterized in that: the direction that this kink is tilted down stretches out simultaneously.

7, motor rotor according to claim 3 is characterized in that: this conjunction periphery has and is the outward extending kink of continuous turnover.

8, motor rotor according to claim 7 is characterized in that: this kink is by this conjunction periphery and extends axially out a vertical section, is by this vertical section turnover and radially extends a horizontal segment.

9, according to claim 1,2,4 or 7 described motor rotors, it is characterized in that: the binding end of this axle has additional another conjunction.

10, according to claim 1,2,4,5,6,7 or 8 described motor rotors, it is characterized in that: this conjunction is provided with several combined holes.

11, according to claim 1,2,4,5,6,7 or 8 described motor rotors, it is characterized in that: this assembly hole is through to outer surface by the inner surface of this wheel hub.