CN208128056U - Prevent motor resonance from changing voice mechanism - Google Patents

Abstract

The utility model belongs to motor vibration proof mechanism technical field, more particularly to one kind prevents motor resonance from changing voice mechanism, including lower casing and the upper casing being fixedly connected on above lower casing, upper casing and lower casing are enclosed the cavity for accommodating motor jointly, the front end of lower casing is equipped with elastic sheet, the arc groove of the motor drive shaft for positioning motor is offered on elastic sheet, the groove face of arc groove is used for and motor shaft contacts.Wherein, elastic sheet makes the groove face and motor shaft contacts of arc groove by the elastic force of itself, realize the precise positioning to motor drive shaft, effectively avoid motor drive shaft that positional shift occurs, so that the operating of motor drive shaft is more steady, when revolving speed mutation, apparent covibration is avoided the occurrence of, prevents biggish noise and occurs.

Description

Prevent motor resonance from changing voice mechanism

Technical field

The utility model belongs to motor vibration proof mechanism technical field more particularly to one kind prevents motor resonance from changing voice mechanism.

Background technique

Motor has in fields such as machinery, electronics to be widely applied.Wherein, generally by stator, the part such as rotor forms motor, Rotor rotates at work.For motor when constant voltage works, the frequency of rotor rotation is stable.Due to brush, axis The abrasion and vibration for holding equal parts cause motor that certain noise occurs.Under normal conditions, rotor is rotated around own axes, is had Preferable static balance and dynamic balancing.Motor issue noise be also it is metastable.However due to designing and manufacturing, Part motor has that dynamic stationary performance is bad.And since there are small gap, motors between motor drive shaft and bearing Situations such as rotation axis of axis will deviate, and motor will appear galloping, and revolving speed is mutated, the noise for causing motor to issue It changes, shows as the phenomenon that changing voice.Intrinsic frequency and the intrinsic frequency of the part being connected are total to especially after the rotation speed change of motor When rate is close, apparent covibration will occur, biggish noise occurs.

Utility model content

The purpose of this utility model is to provide one kind to prevent motor resonance from changing voice mechanism, it is intended to solve in the prior art Motor can cause to occur changing voice at work because of resonance or the technical issues of loud noise.

To achieve the above object, the technical solution adopted in the utility model is：One kind prevents motor resonance from changing voice mechanism, packet The upper casing for including lower casing and being fixedly connected on above the lower casing, the upper casing have been enclosed jointly with the lower casing for accommodating The cavity of motor, the front end of the lower casing are equipped with elastic sheet, offer on the elastic sheet for positioning the motor The groove face of the arc groove of motor drive shaft, the arc groove is used for and the motor shaft contacts.

Preferably, the elastic sheet extends backwards to the cavity and is obliquely installed towards the motor drive shaft.

Preferably, the lower casing includes lower plate, lower front end plate and lower end plate, the lower front end plate connection in a vertical shape In the front end of the lower plate, the lower end plate rear end in a vertical shape for being connected to the lower plate；

The upper casing includes upper plate, upper front end-plate and upper end plate, the upper front end-plate is in a vertical shape be connected to it is described The front end of upper plate, the upper end plate rear end in a vertical shape for being connected to the upper plate；

The lower plate, the lower front end plate, the lower end plate, the upper plate, the upper front end-plate and it is described on End plate is enclosed the cavity jointly, and the elastic sheet is set to the top of the lower front end plate.

Preferably, the top of the lower front end plate is equipped with limiting stand, offers on the limiting stand for positioning the horse Up to the U-lag of the shaft rotary table of front end, the groove face of the U-lag is contacted for the shaft rotary table, and the elastic sheet is set to The outside portion of the U-lag.

Preferably, the outside portion of the limiting stand is equipped with the reinforcing rib for reinforcing the intensity of the limiting stand.

Preferably, the bottom of the upper front end-plate is equipped with positioning table, the bottom of the positioning table be equipped with for the horse The positioning plane that shaft rotary table up to front end abuts.

Preferably, the lower plate is used to support the lower rib for contacting the bottom of the motor equipped with several；On described Top plate is used to support the upper rib for contacting the top of the motor equipped with several.

Preferably, the top of the lower end plate, which is equipped with, contacts the lower fixed of positioning for the rear end rotary table with the motor rear end Position cambered surface；The bottom of the upper end plate is equipped with the upper positioning cambered surface that positioning is contacted for the rear end rotary table with the motor rear end.

Preferably, the lower end plate is equipped with the lower avoiding hollow groove for avoiding the lower electrode slice of the motor；On described End plate is equipped with the upper avoiding hollow groove for powering on pole piece for avoiding the motor.

Preferably, the lower plate, the lower front end plate and the lower end plate pass through plastic material integrated injection molding And the lower casing is made；The upper plate, the upper front end-plate and the upper end plate pass through plastic material integrated injection molding And the upper housing is made.

The beneficial effects of the utility model：The motor resonance that prevents of the utility model is changed voice mechanism, in use, motor is pacified It is placed in the cavity that upper casing and lower casing are enclosed jointly, motor is clamped between lower casing and upper casing, and the motor drive shaft of motor extends Out to except cavity, motor is so limited by cavity so that motor install after stability more；Due to the front end of lower casing It is provided with elastic sheet, and offers the arc groove for positioning motor drive shaft on the elastic sheet, in this way, extending out to cavity Except motor drive shaft by arc groove defined position, elastic sheet makes groove face (the i.e. arc of arc groove by the elastic force of its own The inner wall of shape slot) and motor shaft contacts, it realizes the precise positioning to motor drive shaft, effectively avoids motor drive shaft that positional shift occurs, So that the operating of motor drive shaft is more steady, when revolving speed mutation, avoid the occurrence of apparent covibration, prevent compared with Big noise occurs, and then it is possible to prevente effectively from the phenomenon that sound that motor issues generates variation and changes voice.

Detailed description of the invention

It, below will be to embodiment or the prior art in order to illustrate more clearly of the technical scheme in the embodiment of the utility model Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is only that this is practical new Some embodiments of type for those of ordinary skill in the art without any creative labor, can be with It obtains other drawings based on these drawings.

Fig. 1 is provided by the embodiment of the utility model to prevent motor resonance from changing voice structural representation of mechanism when being equipped with motor Figure.

Fig. 2 is the Structure explosion diagram one of Fig. 1.

Fig. 3 is the Structure explosion diagram two of Fig. 1.

Fig. 4 is provided by the embodiment of the utility model to prevent motor resonance from changing voice the structural schematic diagram of mechanism.

Fig. 5 be it is provided by the embodiment of the utility model prevent motor resonance change voice mechanism lower casing structural schematic diagram.

Fig. 6 be it is provided by the embodiment of the utility model prevent motor resonance change voice mechanism upper casing structural schematic diagram.

Wherein, each appended drawing reference in figure：

10-11-lower front end of lower casing plates 12-lower end plate

13-lower plate 14-lower installation board, 15-support plates

20-upper casings 21-upper front end-plate 22-go up end plate

23-upper plate 24-upper mounting plate, 30-motors

31-32-rear end of shaft rotary table, 33-motor drive shafts of rotary table

34-lower electrode slices 35-power on 100-cavity of pole piece

111-elastic sheet 112-limiting stand, 113-reinforcing ribs

114-through-holes 121-lower positioning cambered surface 122-lower avoiding hollow groove

131-lower 211-positioning tables of rib 221-upper positioning cambered surface

222-go up the upper 1111-arc groove of rib of avoiding hollow groove 231-

1121-U-lag 2111-positioning planes.

Specific embodiment

The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng The embodiment for examining the description of attached drawing 1~6 is exemplary, it is intended to for explaining the utility model, and should not be understood as practical to this Novel limitation.

In the description of the present invention, it should be understood that term " length ", " width ", "upper", "lower", " preceding ", The orientation or positional relationship of the instructions such as " rear ", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside" is based on attached Orientation or positional relationship shown in figure, is merely for convenience of describing the present invention and simplifying the description, rather than indication or suggestion Signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to this The limitation of utility model.

In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include one or more of the features.The meaning of " plurality " is two or two in the description of the present invention, More than, unless otherwise specifically defined.

In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be Mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary The interaction relationship of connection or two elements inside element.It for the ordinary skill in the art, can basis Concrete condition understands the concrete meaning of above-mentioned term in the present invention.

As shown in Figures 1 to 3, one kind provided by the embodiment of the utility model prevents motor resonance from changing voice mechanism, for fixing Motor 30 simultaneously prevents resonance and changes voice.Preventing the motor resonance mechanism that changes voice includes lower casing 10 and being fixedly connected on the lower casing 10 The upper casing 20 of top, the upper casing 20 is enclosed the cavity 100 for accommodating motor 30 with the lower casing 10 jointly, described The front end of lower casing 10 is equipped with elastic sheet 111, and the motor drive shaft for positioning the motor 30 is offered on the elastic sheet 111 33 arc groove 1111, the groove face of the arc groove 1111 with the motor drive shaft 33 for contacting.Specifically, the utility model is real The motor resonance that prevents for applying example is changed voice mechanism, in use, motor 30 is placed in upper casing 20 and lower casing 10 is enclosed jointly In cavity 100, motor 30 is clamped between lower casing 10 and upper casing 20, and the motor drive shaft 33 of motor 30 extends out to except cavity 100, Motor 30 is so limited by cavity 100, so that the stability after the installation of motor 30 is more；Since the front end of lower casing 10 is arranged Flexible thin slice 111, and the arc groove 1111 for positioning motor drive shaft 33 is offered on the elastic sheet 111, in this way, extending Out to the motor drive shaft 33 except cavity 100 by 1111 defined position of arc groove, elastic sheet 111 is made by the elastic force of its own The groove face (i.e. the inner wall of arc groove 1111) for obtaining arc groove 1111 is contacted with motor drive shaft 33, is realized to the accurate fixed of motor drive shaft 33 Position effectively avoids motor drive shaft 33 that positional shift occurs, so that the operating of motor drive shaft 33 is more steady, in feelings such as revolving speed mutation Under condition, apparent covibration is avoided the occurrence of, prevents biggish noise and occurs, and then it is possible to prevente effectively from the sound that motor 30 issues The phenomenon that sound generates variation and changes voice.

Further, being connected and fixed between lower casing 10 and upper casing 20 can be provided with lower casing 10 by pin and cooperation It is realized with the pin hole on upper casing 20.It is of course also possible to offer the card slot and grab to match on lower casing 10 and upper casing 20 Realization connects and fixes.

Further, connected structure can be set so that lower casing 10 and upper casing 20 in the junction of lower casing 10 and upper casing 20 Between cooperation it is even closer, such as slot can be set, and inserting column is set in the corresponding position of upper casing 20 on lower casing 10, lead to It crosses in inserting column insertion slot and is formed mating and make the connection between lower casing 10 and upper casing 20 even closer with slot.

In the present embodiment, as shown in Fig. 1~2 and Fig. 5, the elastic sheet 111 extends backwards to the cavity 100 and direction The motor drive shaft 33 is obliquely installed.Specifically, i.e., the bottom end of elastic sheet 111 relative to its top closer to cavity 100 Setting, elastic sheet 111 oblique in this way can be more easier to play its elastic force, form a upward elastic force, The motor drive shaft 33 of motor 30 is supported by the elastic force with this, the position restriction to motor drive shaft 33 is realized, so that motor The top in hole or brearing bore on axis 33 and motor 30 is in close contact, it is ensured that motor drive shaft 33 is during rotation around its own Axis rotation, avoid shifting, combine upper casing 20 and limitation of the lower casing 10 to motor 30 in this way, motor 30 can be reduced jointly Resonance at work occurs to prevent biggish noise, and then it is possible to prevente effectively from the sound that motor 30 issues generates change The phenomenon that changing and changing voice.

In the present embodiment, as shown in Figure 2-5, the lower casing 10 includes lower plate 13, lower front end plate 11 and lower end plate 12, the lower front end plate 11 front end in a vertical shape for being connected to the lower plate 13, the lower end plate 12 connection in a vertical shape In the rear end of the lower plate 13；Lower front end plate 11 and lower end plate 12 are connected to the rear and front end of lower plate 13 vertically respectively, So that lower casing 10 substantially forms Qian word shape structure.

Similarly, as shown in Fig. 2~3 and Fig. 6, the upper casing 20 includes upper plate 23, upper front end-plate 21 and upper end plate 22, The upper front end-plate 21 front end in a vertical shape for being connected to the upper plate 23, the upper end plate 22 is in a vertical shape to be connected to institute State the rear end of upper plate 23；Upper front end-plate 21 and upper end plate 22 are connected to the rear and front end of upper plate 23 vertically respectively, so that Upper casing 20 substantially forms the Qian word shape structure of 180 ° of overturning.

Further, as shown in figure 4, the lower plate 13, the lower front end plate 11, the lower end plate 12, it is described on Top plate 23, the upper front end-plate 21 and the upper end plate 22 are enclosed the cavity 100, the elastic sheet 111 jointly Set on the top of the lower front end plate 11.Specifically, the opposite sides portion of cavity 100 is hatch frame, i.e. the corresponding horse of cavity 100 Opposite sides portion up to 30 is hatch frame.The limitation face to motor 30 can be so reduced when installing motor 30, i.e., so that The installation difficulty of motor 30 is reduced, the convenience installed to motor 30 is promoted and improves the installation effectiveness to motor 30.

As shown in Fig. 2, generally, the front end of motor 30 is provided with shaft rotary table 31, wherein motor drive shaft 33 is by shaft circle Platform 31 is pierced by.In the present embodiment, the top of the lower front end plate 11 is equipped with limiting stand 112, opens up on the limiting stand 112 useful In the U-lag 1121 for the shaft rotary table 31 for positioning 30 front end of motor, the groove face of the U-lag 1121 is for shaft circle Platform 31 contacts, and the elastic sheet 111 is set to the outside portion of the U-lag 1121.Specifically, the shape adaptation of U-lag 1121 The outer arcuate of the lower part of the shaft rotary table 31 of 30 front end of motor setting, can make the motor 30 being installed in cavity 100 in this way 31 support of shaft rotary table in the U-lag 1121 of limiting stand 112, by the U-lag 1121 of limiting stand 112 to shaft rotary table 31 It is supported positioning, further strengthens the position restriction to motor 30, motor 30 is effectively prevent to resonate, it is practical.

Passing through shaft rotary table 31 in addition, the outside portion position that U-lag 1121 is arranged in elastic sheet 111 is just corresponded to Motor drive shaft 33 lower section, and then motor drive shaft 33 can be limited by the way that the arc groove 1111 of elastic sheet 111 is arranged in.

In the present embodiment, as shown in Figure 2-5, the outside portion of the limiting stand 112 is equipped with for reinforcing the limiting stand The reinforcing rib 113 of 112 intensity.Specifically, the quantity of reinforcing rib 113 can be one or two, pass through reinforcing rib 113 The intensity that can reinforce limiting stand 112 is set, and in this way when motor 30 generates vibration at work, limiting stand 112 can be born The vibration force of motor 30 is without damaging.Preferably, reinforcing rib 113 sets with the integrated molding of limiting stand 112 and is made.

In the present embodiment, as shown in Figure 2 and Figure 6, the bottom of the upper front end-plate 21 is equipped with positioning table 211, the positioning The bottom of platform 211 is equipped with the positioning plane 2111 for abutting with the shaft rotary table 31 of 30 front end of motor.Specifically, it positions The positioning plane 2111 that the bottom of platform 211 is formed is abutted with the top of shaft rotary table 31, combines limiting stand 112 jointly perpendicular in this way Histogram to top and bottom shaft rotary table 31 is limited, and limiting stand 112 be arranged U-lag 1121 can also be in water It square limits, can be realized in this way vertically and horizontally can going out to motor 30 to shaft rotary table 31 Axis rotary table 31 plays position-limiting action, and motor drive shaft 33 is further prevented to deviate, so can significantly improve motor drive shaft 33 because Motor 30 caused by deviating is changed voice phenomenon.

Preferably, as shown in fig. 6, upper front end-plate 21 and positioning table 211 are a smooth plate structure.

In the present embodiment, as shown in Figure 2 and Figure 5, the lower plate 13 is equipped with several be used to support and contacts the motor The lower rib 131 of 30 bottom.Specifically, the setting of lower rib 131 is with the bottom of motor 30 for directly contacting, in this way can be with The area that motor 30 is directly contacted with lower plate 13 is effectively reduced, so can reduce the noise that the resonance of motor 30 generates.Wherein, Lower rib 131 can be extended along the length direction of lower plate 13, can also be extended along the width direction of lower plate 13 Setting.Arranged for interval between several lower ribs 131, the quantity of lower rib 131 can be three, four etc..

In the present embodiment, as shown in Figure 2 and Figure 6, the upper plate 23 is equipped with several be used to support and contacts the motor The upper rib 231 at 30 top.Specifically, the setting of upper rib 231 is with the top of motor 30 for directly contacting, in this way can be with The area that motor 30 is directly contacted with upper plate 23 is effectively reduced, so can reduce motor 30 because of the noise that resonance generates. Wherein, upper rib 231 can be extended along the length direction of upper plate 23, can also be along the width direction of upper plate 23 It is extended.Arranged for interval between several upper ribs 231, the quantity of upper rib 231 can be three, four etc..

As seen in figures 3-5, generally, the rear end of motor 30 is provided with rear end rotary table 32, in the present embodiment, it is described it is lower after The top of end plate 12 is equipped with the lower positioning cambered surface 121 for contacting positioning with the rear end rotary table 32 of 30 rear end of motor.Specifically Ground, lower positioning cambered surface 121 are convex structure, it can adapt to the position that the rear end rotary table 32 of 30 rear end of motor is arranged in On the one hand foreign aid portion can play the role of support to rear end rotary table 32 in this way, on the other hand also play limit to rear end rotary table 32 The effect set is positioned, so as to effectively prevent motor 30 to cause 30 rear end position of motor position occur because of resonance at work Offset is set, and then resonance can be prevented and changed voice, and places loud noise generation.

In the present embodiment, as shown in figs. 34, the bottom of the upper end plate 22 be equipped with for 30 rear end of motor Rear end rotary table 32 contact positioning upper positioning cambered surface 221.Specifically, upper positioning cambered surface 221 structurally and functionally with lower positioning Cambered surface 121 is similar, on the contrary, it can play the role of support and positioning to rear end rotary table 32 at top, with lower positioning cambered surface 121 The pore structure for setting and forming the outer diameter that an internal diameter adapts to rear end rotary table 32 is enclosed jointly, can be limited to rear end rotary table 32 in this way In the pore structure, play to the more preferably locating effect of rear end rotary table 32.

To sum up, lower positioning cambered surface 121 and upper positioning cambered surface 221, which combine, plays positioning action to rear end rotary table 32 jointly, with And limiting stand 112 and positioning table 211 combine and play positioning action to shaft rotary table 31 jointly, the rear and front end of such motor 30 is all It can be realized positioning, significantly improve to motor 30 because motor 30 caused by the offset of motor drive shaft 33 is changed voice.

In the present embodiment, as shown in figure 3, the lower end plate 12 is equipped with the lower electrode slice for avoiding the motor 30 34 lower avoiding hollow groove 122.Specifically, the rear end of motor 30 is typically provided with lower electrode slice 34, by opening on lower end plate 12 Avoiding hollow groove 122 is set and can be and to obtain motor 30 when being mounted in cavity 100, which can pass through the lower avoiding hollow groove 122 extend out to except cavity 100, are electrically connected to realize with power supply line.Also, the setting of the lower avoiding hollow groove 122 is not yet It influences whether the intensity of lower casing 10 and interferes with the installation of other component, design is rationally, practical.

In the present embodiment, as shown in figure 3, the upper end plate 22, which is equipped with, powers on pole piece for avoid the motor 30 35 upper avoiding hollow groove 222.Specifically, the rear end of motor 30, which is typically provided with, powers on pole piece 35, by opening on upper end plate 22 If upper avoiding hollow groove 222 can be to obtain motor 30 when being mounted in cavity 100, this powers on pole piece 35 can be by avoiding hollow groove on this 222 extend out to except cavity 100, are electrically connected to realize with power supply line.Also, setting of avoiding hollow groove 222 is not yet on this It influences whether the intensity of upper casing 20 and interferes with the installation of other component, design is rationally, practical.

In the present embodiment, as shown in figs. 2 to 4, the bottom of the lower plate 13 is equipped with support plate 15.Specifically, support plate 15 setting be when prevent motor resonance change voice mechanism need to be mounted on electronic product (such as gear-box, massager) when, should Support plate 15 can be connected in other structures, allow entirely prevent motor resonance change voice mechanism fixation it is more steady, so The stability for preventing motor resonance from changing voice mechanism can further be promoted.

In the present embodiment, it is preferable that the lower plate 13, the lower front end plate 11 and the lower end plate 12 pass through plastic cement Material integrated injection molding and the lower casing 10 is made；The upper plate 23, the upper front end-plate 21 and the upper end plate 22 20 body of upper casing is made by plastic material integrated injection molding.Specifically, pass through plastic material injection molding lower casing 10 With the manufacture of upper casing 20, it can not only make lower casing 10 and 20 homogeneity of product of upper casing more preferable, and the connection between component Stability is more preferably.Meanwhile lower casing 10 and upper casing 20 are suitble to high-volume manufacture production, and high production efficiency, production cost are lower.

In the present embodiment, as shown in Fig. 1~2, the outside portion of the lower front end plate 11, which extends, is equipped with lower installation board 14；It is described The outside portion of upper front end-plate 21, which extends, is equipped with upper mounting plate 24.Specifically, the setting of lower installation board 14 can complete lower casing 10 Installation after, connect by the lower installation board 14 with other external components or cooperate for other component install, promotion prevent horse It changes voice the versatility of mechanism up to resonance；Similarly, the effect of upper mounting plate 24 is similar with lower installation board 14, anti-also for being promoted Only motor resonance is changed voice the versatility of mechanism so that prevent motor resonance change voice mechanism installation be cleverer on electronic product It is living.

As shown in Fig. 1~2, further, offered on the lower installation board 14 corresponding with 111 position of elastic sheet Through-hole 114, the size of through-hole 114 is consistent with projection size of the elastic sheet 111 under natural conditions on lower casing 10, in this way may be used So that elastic sheet 111 is realized in injection mold by being inserted through 114 structure of through-hole.Wherein, elastic sheet 111 preferably with 10 integrated injection molding of lower casing, is equally fabricated using plastic material.

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model Protection scope within.

Claims (10)

1. one kind prevents motor resonance from changing voice mechanism, it is characterised in that：Including lower casing and it is fixedly connected on above the lower casing Upper casing, the upper casing and the lower casing are enclosed the cavity for accommodating motor jointly, and the front end of the lower casing is equipped with bullet Property thin slice offers the arc groove of the motor drive shaft for positioning the motor, the groove face of the arc groove on the elastic sheet For with the motor shaft contacts.

2. according to claim 1 prevent motor resonance from changing voice mechanism, it is characterised in that：The elastic sheet is backwards to described Cavity extends and is obliquely installed towards the motor drive shaft.

3. according to claim 1 prevent motor resonance from changing voice mechanism, it is characterised in that：The lower casing include lower plate, Lower front end plate and lower end plate, the lower front end plate front end in a vertical shape for being connected to the lower plate, the lower end plate are in Vertical shape is connected to the rear end of the lower plate；

The upper casing includes upper plate, upper front end-plate and upper end plate, and the upper front end-plate is in a vertical shape to be connected to the upper top The front end of plate, the upper end plate rear end in a vertical shape for being connected to the upper plate；

The lower plate, the lower front end plate, the lower end plate, the upper plate, the upper front end-plate and the upper rear end Plate is enclosed the cavity jointly, and the elastic sheet is set to the top of the lower front end plate.

4. according to claim 3 prevent motor resonance from changing voice mechanism, it is characterised in that：It is set at the top of the lower front end plate There is limiting stand, the U-lag of the shaft rotary table for positioning the motor front end is offered on the limiting stand, the U-lag Groove face is contacted for the shaft rotary table, and the elastic sheet is set to the outside portion of the U-lag.

5. according to claim 4 prevent motor resonance from changing voice mechanism, it is characterised in that：The outside portion of the limiting stand is set There is the reinforcing rib of the intensity for reinforcing the limiting stand.

6. according to claim 3 prevent motor resonance from changing voice mechanism, it is characterised in that：The bottom of the upper front end-plate is set There is positioning table, the bottom of the positioning table is equipped with the positioning plane for abutting with the shaft rotary table of the motor front end.

7. preventing motor resonance from changing voice mechanism according to claim 3~6 is described in any item, it is characterised in that：The lower plate The lower rib for contacting the bottom of the motor is used to support equipped with several；The upper plate is used to support contact equipped with several The upper rib at the top of the motor.

8. preventing motor resonance from changing voice mechanism according to claim 3~6 is described in any item, it is characterised in that：The lower rear end The top of plate is equipped with the lower positioning cambered surface that positioning is contacted for the rear end rotary table with the motor rear end；The bottom of the upper end plate Portion is equipped with the upper positioning cambered surface that positioning is contacted for the rear end rotary table with the motor rear end.

9. preventing motor resonance from changing voice mechanism according to claim 3~6 is described in any item, it is characterised in that：The lower rear end Plate is equipped with the lower avoiding hollow groove for avoiding the lower electrode slice of the motor；The upper end plate is equipped with for avoiding the horse What is reached powers on the upper avoiding hollow groove of pole piece.

10. preventing motor resonance from changing voice mechanism according to claim 3~6 is described in any item, it is characterised in that：The bottom The lower casing is made by plastic material integrated injection molding in plate, the lower front end plate and the lower end plate；The upper top The upper housing is made by plastic material integrated injection molding in plate, the upper front end-plate and the upper end plate.