CN1153340C - Step-by-step motor - Google Patents
Step-by-step motor Download PDFInfo
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- CN1153340C CN1153340C CNB971103011A CN97110301A CN1153340C CN 1153340 C CN1153340 C CN 1153340C CN B971103011 A CNB971103011 A CN B971103011A CN 97110301 A CN97110301 A CN 97110301A CN 1153340 C CN1153340 C CN 1153340C
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- 230000008093 supporting effect Effects 0.000 claims description 12
- 238000002788 crimping Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 210000000707 wrist Anatomy 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 239000010687 lubricating oil Substances 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 150000002148 esters Chemical class 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- 230000004323 axial length Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
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Abstract
A stepping motor can prevent the sliding loss of the rotary shaft of a motor and the generation of the rattling sound caused by the rotary shaft of the motor, securely. In this stepping motor, a lead screw part is formed at a rotary shaft of the motor protruding from a stator part 2. Both ends of the rotary shaft of the motor are supported by two thrust bearings. At the same time, the rotary shaft of the motor is energized with a spring in the axial direction. Then, one thrust bearing of two thrust bearings has a bearing body, whose contact surface with the rotary shaft of the motor is made to be the curved surface shape. The movement of the outer bearing body in the axial direction is allowed. The bearing body is supported with a guide plate having a guide part for guiding the movement. At the same time, a springing plate, which energizes the bearing body with a spring in the axial direction, is provided.
Description
Technical field
The present invention relates on motor rotation axis, form the motor of screw mandrel portion.
Background technology
Existing a kind of electric motor structure forms the stepping motor 30 of screw mandrel portion 32 as shown in figure 17 on motor rotation axis 31, use the two ends of 2 thrust bearing 33,34 supporting motor rotating shafts 31 respectively.
Be provided with metal bearing 35 in thrust bearing 34 sides, at radial support motor rotation axis 31.
On motor rotation axis 31, be fixed with rotor magnet 37 with stator department 36 with having specified gap and subtend.
Thrust bearing 34 usefulness flat springs 38 constitute with ball 39, and block the axial load of motor rotation axis 31 movably with the spring pressure of flat spring 38.
Stepping motor 40 shown in Figure 180 is to be illustrated in Japanese Utility Model to disclose the other existing example that is disclosed for 1994 No. 21383.
Stepping motor 40 has omitted central metal bearing 35 shown in Figure 17, and with 2 thrust bearings, promptly uses the two ends of bearing 42 with bearing (diagrammatic sketch omission) the supporting motor rotating shaft 41 of top one side of stator department one side.
The bearing 42 of stator department one side comprises, the ball bearing of being made up of as shown in figure 19 prefabricating plate spring 43 and a plurality of balls 44.
In stepping motor shown in Figure 17 30, because of the quilt that combines with screw mandrel portion 32 send the reaction force of body, motor rotation axis 31 exists the situation that produces the snapping snapping sound with metal bearing 35 collisions.
This is because sent the throughput direction of body not necessarily identical, so the reaction force that screw mandrel portion 32 bears is also different along with direction of rotation.As a result, just be easy to generate the sound of snapping snapping along with its change.
The sound generating of this snapping snapping is also with relevant in metal bearing 35 parts generation slip loss.
In addition, metal bearing 35 itself also can cause reducing because of the sliding bearing function makes the revolving force of motor rotation axis 31.
On the other hand, stepping motor 40 shown in Figure 180 because of there not being radially metal bearing 35 of supporting, and will go out the axiality of stator department and rotor in the school, so prefabricating plate spring 43 is made as shown in figure 19, formed the shape of the complexity of a plurality of spirality wrists.
In addition, because prefabricating plate spring 43 is not only the axially movable bearing effect of playing motor rotation axis 41, and plays the bearing effect that moves radially, so the setting of spring constant is difficult to.That is to say that when strengthening spring force in order to suppress to move radially, then the load for motor rotation axis 41 is just big, just produces spin loss.
On the contrary, if inhibition axial load and when weakening spring force, amount of deflection radially is also just big, then exist motor rotation axis 41 and break away from the problem that bearings 42 or motor rotation axis 41 and the peripheral corners 46 in the hole 45 that connects are collided.
Summary of the invention
Shortcoming in view of above-mentioned existence the objective of the invention is to, and a kind of stepping motor that can prevent the slip loss of motor rotation axis and produce the snapping snapping sound because of motor rotation axis is provided.
The invention provides a kind of like this motor, have the 1st thrust bearing of supporting motor rotating shaft one end and the described motor rotation axis other end of supporting to described motor rotation axis axially carry out the 2nd spacing thrust bearing, wherein the 1st thrust bearing has: supporting motor rotating shaft one end and can be along the axially movable bearing body of described motor rotation axis; Can be to described bearing body along the described ways that leads with moving axially; By described bearing body to described motor rotation axis along the described elastic force apparatus that axially applies elastic force; Elastic force apparatus has with a plurality of elastic part of impartial angle configurations around described motor rotation axis; Motor rotation axis has rotor magnet, be provided with rotor magnet in the stator department, the other end of motor is given prominence to and is supported by the 2nd thrust bearing from the other end of stator department, with an end of the other end opposition side of stator department, the ways that bearing body is led is installed, ways has the location division of relative motor stator portion location usefulness, supports the location division between the stator poles tooth, so that the ways relative stator is positioned.
Description of drawings
Fig. 1 is the major part cutaway top view of the present invention the 1st embodiment.
Fig. 2 is the vertical view of the Ball support portion that uses in the 1st embodiment.
Fig. 3 is the vertical view of the guide plate that uses in the 1st embodiment.
Fig. 4 is the upward view of the guide plate of Fig. 3.
Fig. 5 is the major part schematic diagram that stator department and guide plate teat concern usefulness among explanation the 1st embodiment.
Fig. 6 is the vertical view of the elastic plate that uses in the 1st embodiment.
Fig. 7 is the cutaway view along the VII-VII line of elastic plate among Fig. 6.
Fig. 8 is the mobile major part cutaway view that cause state variation use of explanation the 1st embodiment because of motor rotation axis.
Fig. 9 is the major part cutaway view of the present invention the 2nd embodiment.
Figure 10 is the vertical view of the Ball support portion that uses in the 2nd embodiment.
Figure 11 is the vertical view of the guide plate that uses in the 2nd embodiment and the end view of guide part.
Figure 12 is the vertical view of the elastic plate that uses in the 2nd embodiment.
Figure 13 is the mobile major part cutaway view that cause state variation use of explanation the 2nd embodiment because of motor rotation axis.
Figure 14 is the major part cutaway view of the present invention the 3rd embodiment.
Figure 15 is the Ball support portion that uses in the 3rd embodiment and the vertical view of elastic part.
Figure 16 is the schematic diagram that the other example of thrust bearing is described usefulness.
Figure 17 is a schematic diagram of representing the stepping motor that uses in the prior art.
Figure 18 is the schematic configuration diagram of the other stepping motor of prior art.
Figure 19 is the schematic diagram that is illustrated in the prefabricating plate spring that uses in the stepping motor of Figure 18.
Embodiment
According to Fig. 1 to Fig. 8 the present invention the 1st embodiment is described below.
Stepping motor 1 has the motor rotation axis 3 that stretches out from stator department 2 as shown in Figure 1.
Be formed with known screw mandrel portion 4 on motor rotation axis 3, it has along with the rotation of motor rotation axis 3 makes the quilt that combines with screw mandrel portion 4 send body (diagrammatic sketch omission) to axially movable function.
Control the moving direction that is sent body by the direction of rotation of switching motor rotating shaft 3.
In addition, because this structure is identical with the stator department structure of known stepping motor, the Therefore, omited describes in detail.
Fixing on stator department 2 stepping motor is installed to the mounting panel of using on the various device 16, is provided with a through hole 16a in the central authorities of mounting panel 16, to connect motor rotation axis 3.
The periphery of motor rotation axis 3 and the gap L of the inner peripheral surface 16b of through hole 16a are set as greater than the coaxiality error of thrust bearing 6 with motor rotation axis 3.
Be fixed with rotor magnet 17 cylindraceous on motor rotation axis 3, the diameter M of axle through hole 16a is less than the diameter of rotor magnet 17.
Side that contacts with motor rotation axis 3 at rotor magnet 17 two ends is formed with the recess 18,18 that is cut into taper.
For the recess 18 of axle through hole 16a one side, have to deposit and enter into the rubbish of stator department 2 inside and do not make rubbish enter into the effect of the relative magnetic gap part of rotor magnet 17 and stator department 2 from gap L.
The two ends of motor rotation axis 3 are respectively with 2 the 1st, 6,5 supportings of the 2nd thrust bearing.
Be formed on the 2nd thrust bearing 5 of Fig. 1 downside, because its structure and existing thrust bearing shown in Figure 17 are roughly the same, its detailed description of Therefore, omited.
The 1st thrust bearing 6 comprises: 1 ball 19; Ball 19 is made the bearing body 7 of supporting; Allow bearing body 7 move axially and as it is moved the guide plate 8 of the ways that leads; At the elastic plate 9 that axially bearing body 7 is applied elastic force as elastic force apparatus.
In addition, on the bearing surface of ball 19 and circular cone recess 3a, scribble the lubricating oil that the resistance of reducing friction is used.
Bearing body 7 as shown in Figures 1 and 2, it has: the 7a of Ball support portion that the cylindrical bore of the ball 19 of packing into is arranged; For preventing that bearing body 7 rotations from preventing the 7b of portion to 3 rotations radially outstanding and uniformly-spaced configuration; Connect 3 circular-arc connecting portion 7c that rotation prevents the 7b of portion.
As Fig. 1 and shown in Figure 3, be molded into circular plate body as the guide plate 8 of ways, and portion is formed with and allows that bearing body 7 is moving axially and it is moved the pilot hole 8a that leads in the central.
Because of preventing the 7b of portion, rotation embeds slot part 8b, so prevented the radially rotation of bearing body 7.
At the opposition side of the stator department 2 of guide part 8c, be provided with 3 outstanding slightly circular-arc protuberance 8d.
In an embodiment, guide part 8c and the 7a of Ball support portion butt are with the guide function of performance bearing body 7.
Near slot part 8b, the elastic part 9a of elastic plate 9 is the inclined plane, its can with the 7a of Ball support portion crimping.
Slot part 8b and guide part 8c are at the side formation pentagonal protuberance 8e as shown in Figure 4 towards stator department 2.
On guide plate 8, equally spaced be formed with respectively and adjust 2 hole 8g that use the motor mounting position and 3 tappet 8h that guarantee to combine usefulness with elastic plate 9.
On elastic plate 9, be provided with: 120 ° of 3 elastic part 9a that uniformly-spaced dispose that apply elastic force with bearing body 7 butts all the time; Consistent with the hole 8g of guide plate 8 and adjust 2 hole 9b that the motor mounting position is used; The relative stator portion 2 with the tappet 8h crimping of guide plate 8 and push guide plate 8 uniformly-spaced the configuration the press section 9c of 3 place; The 9e of hasp portion that pawl (diagrammatic sketch omission) combines that buckles with the 1st stator 10 that plays the housing effect; Elastic plate 9 is fixed on the connecting portion 9d of 2 180 ° of balanced configurations on the stator department 2.
Central authorities' formation at elastic plate 9 is the outstanding protuberance 9f of triangular shape to foreign side slightly, to encase the circular-arc protuberance 8d of main guide part 8c.
When elastic plate 9 is assembled into stator department 2, makes the hole 9b of elastic plate 9 consistent, and the 9e of hasp portion is combined with the pawl of buckleing of the 1st stator 10 with the hole 8g of guide plate.
By assembling, elastic part 9a is set at above-below direction and the slot part 8b position overlapped of Fig. 1, and utilizes and to be formed near the inclined plane of slot part 8b, and elastic part 9a can bring into play elasticity.
In case constitute aforesaid stepping motor 1, then when motor assembled, even produce axial play, axial play also can move axially (with reference to Fig. 8) in the guiding lower edge of the guide part 8c of guide plate 8 by the 7a of Ball support portion of bearing body 7 and disappear.
At this moment, because bearing body 7 is subjected to the guiding of the guide part 8c of guide plate 8, so it can not move radially.
The action that constitutes this stepping motor is as follows.
When flowing through electric current in the coil 14,15 at stator department 2,, make motor rotation axis 3 rotations with rotor magnet 17 one by the magnetic interaction between stator department 2 and the rotor magnet 17.
That is, make screw mandrel portion 4 rotations that are formed on the motor rotation axis 3, thereby make the quilt that combines with screw mandrel portion 4 send body (diagrammatic sketch omission) to move vertically.
Sent the moving direction and the amount of movement of body, the electric current that flows through coil 14,15 is controlled and set.
As mentioned above, when being sent body to move, in the existing stepping motor 30 of Figure 15, produce snapping sound because of metal bearing 35, or generation spin loss, and in stepping motor 1 of the present invention owing to do not establish metal bearing, motor rotation axis 3 by guide part 8c the mobile of bearing body 7 led, so can not collided with mounting panel 16.
Therefore, can not produce snapping sound, and can not produce the slippage loss except two thrust bearings 5,6.
In addition, because the elastic part 9b of elastic plate 9 uniformly-spaced is configured on 3 positions with 120 °, so can balancedly axially apply elastic force to bearing body 7.
In the above-described embodiments, because the gap L of the periphery that makes motor rotation axis 3 and the inner peripheral surface of mounting panel 16 is greater than the coaxiality error of thrust bearing 6 and motor rotation axis 3, so motor rotation axis 3 can not collided with mounting panel 16.
In the above-described embodiments, because the location division 8f of guide plate 8 embeds between the utmost point tooth 13a of the 4th stator 13, relative stator portion 2 guide plates 8 are positioned, so can make the precision of axiality of the 1st thrust bearing 6 relative stator portions 2 good.
Therefore, improved the precision of motor rotation axis 3 with the axiality of stator department 2, the result has improved the gap precision of rotor magnet 17 with stator department 2.
Again, in the above-described embodiments, owing to strengthened the axial length of guide part 8c, so but precision better and is reliably carried out bearing body 7 in axially movable guiding.
In addition, carry out the installation of guide plate 8 and elastic plate 9 relative stator portions 2 once owing to utilize the 9e of hasp portion of elastic plate 9, so be very easy to assembling.
In an embodiment, owing to adopting sliding bearing as thrust bearing, and guide plate 8 etc. is installed on the stator department 2, so also help antiwhip and miniaturization.
According to Fig. 9 to Figure 13 the 2nd embodiment of the present invention is described below.
Stepping motor 21 shown in Figure 9 be different from the 1st embodiment stepping motor 1 be the 1st thrust bearing 6.
Structure with stepping motor 1 is identical in addition, and represents with same-sign, and its explanation is omitted here.
The 1st thrust bearing 6 of the 2nd embodiment comprises: 1 ball 19; The bearing body 22 that ball 19 is supported; Allow that bearing body 22 is moving axially also as it is moved the guide plate 23 of the ways that leads; At the elastic plate 24 that axially bearing body 22 is applied elastic force as elastic force apparatus.
In addition, on the bearing surface of ball 19 and circular cone recess 3a, scribble the lubricating oil that the resistance of reducing friction is used.
Bearing body 22 is as Fig. 9 and shown in Figure 10, and it has: the 7a of Ball support portion that the cylindrical bore of depositing ball 19 is arranged; Prevent bearing body 22 rotation with and the conduct rotation that combines with the part of elastic plate 24 prevent portion in conjunction with recess 22b; Be located in conjunction with between the recess 22b and with the 22c of the portion that is directed to of guide plate 23 butts.
In an embodiment, as rotation prevent portion in conjunction with recess 22b uniformly-spaced to be formed on 3 positions.
As Fig. 9 and shown in Figure 11, the thin plate of rounded shape is formed with in the central and allows that bearing body 22 is moving axially and it is moved the guide part 23a that leads as the guide plate 23 of ways.
Embed the part of stator department 2 at the peripheral part of guide plate 23, be located at the position of 180 ° of symmetries as the peristome 23b of location division what guide plate 23 positioned usefulness.
Owing to guide part 23a die-cut digging from the thin plate forms, so shown in the partial enlarged drawing of Figure 11, it is roomy and top width is narrow and small that it is shaped as root.
Between each guide part 23a of bending, be provided with the guiding assisted parts 23c that minim gap and subtend are arranged with the periphery of the 22a of Ball support portion.
Elastic plate 24 usefulness thin plates constitute, and portion is formed with the guide part 23a of embedding guide plate 23 and the hole 24a of the 22a of Ball support portion in the central.
On elastic plate 24, sentence the spring wrist 24b that uniformly-spaced is formed with from periphery sidewise hole 24a extension 3.
Each top of spring wrist 24b becomes the big joint portion 24c of width, and with bearing body 22 to combine recess 22b chimeric, can apply elastic force and prevent that bearing body 22 from radially rotating bearing body 22.
On the elastic plate 24 also 180 ° be provided with 2 peristome 24d that embed the part of stator departments 2, elastic plate 24 are positioned usefulness symmetrically.
Because the effect of above-mentioned stepping motor 21 is identical with the situation of above-mentioned the 1st embodiment, its explanation of Therefore, omited.
In addition, the Fig. 9 that plays deflection, elastic reaction with spring wrist 24b is corresponding, and the state that spring wrist 24b is not taken place in deflection is represented with Figure 13 as a reference.
From Figure 13, see, when motor rotation axis 3 is in thrust bearing 6 one sides with the state of not deflection with spring wrist 24b, between rotor magnet 17 and mounting panel 16, produce gap g.And this state also is identical in the 1st embodiment Fig. 8.
As mentioned above, the 2nd embodiment is identical with the 1st embodiment, does not produce snapping sound or slippage loss.
In addition, because 1 thin plate of guide plate 23 usefulness constitutes in the 2nd embodiment, thus can make expeditiously, and cheap.
According to Figure 14 to Figure 15 the 3rd embodiment of the present invention is described below.
Stepping motor 51 shown in Figure 14 be different from the 1st embodiment stepping motor 1 be the part of the 1st thrust bearing 6.
In detail, on the bearing body 52 of ester moulding, be formed with and axially reaching the elastic part 52d that radially applies elastic force as elastic component.
In addition, identical with the structure of stepping motor 1, and represent with same-sign, and its explanation is omitted here.
The 1st thrust bearing 6 of the 3rd embodiment mainly comprises: 1 ball 19; The bearing body 52 that ball 19 is supported; Allow that bearing body 52 is moving axially also as it is moved the guide plate 53 as ways that leads.
In addition, on the bearing surface of ball 19 and circular cone recess 3a, scribble the lubricating oil that the resistance of reducing friction is used.
Bearing body 52 has as Figure 14 and shown in Figure 15: the 52a of Ball support portion that the cylindrical bore of the ball 19 of packing into is arranged; Endwisely slipping and axially reaching the elastic part 52d that 3 places form that is equally spaced on that radially applies elastic force with the guide part 53a butt of guide plate 53 as elastic force apparatus; 3 the circular-arc connecting portion 52c that make that connect elastic part 52d.
Elastic part 52d is shaped as, and its root and connecting portion 52c are one, along with towards motor rotation axis 3 one sides of Figure 14 and to radially giving prominence to distending, and radially with axially have elasticity.
In addition, elastic part 52d compares with connecting portion 52c, has strengthened its length in motor rotation axis 3 one sides.
As the guide plate 53 of ways as shown in figure 14, form with circular plate body, and be formed with the guide part 53a that is circular hole in the central.
On guide part 53a, the connecting portion 52c of chimeric with a gap bearing body 52 leads moving axially and it is moved to allow bearing body 52.
In addition, on guide plate 53 with the elastic part 52d butt that uniformly-spaced is formed with 3 places and bearing body 52 and with the groove 53b that combines to radially outstanding elastic part 52d.
Groove 53b because of with combine to radially outstanding elastic part 52d, so can prevent bearing body 52 rotation radially.
That is, groove 53b also has the function of the portion that prevents as the rotation that prevents bearing body 52 rotations.
In the outside of guide plate 53 as shown in figure 14, be provided with installation component 59, this installation component 59 has the 59e of hasp portion that pawl (diagrammatic sketch omission) combines that buckles with the 1st stator 10 of double as housing, and guide plate 53 is positioned and it is installed on the stator department 51.
Bearing body 52, guide plate 53 and installation component 59 with the 52a of Ball support portion are identical with the above embodiments, are formed with to adjust (not shown) such as holes that the motor mounting position is used.
Because the effect of above-mentioned stepping motor 51 is identical with the situation of the 1st, the 2nd above-mentioned embodiment, its explanation of Therefore, omited.
As mentioned above, the 3rd embodiment and the 1st, 2 embodiment are identical, can not produce snapping sound or slippage loss.
In addition, in the 3rd embodiment, owing to be formed with the gap at the connecting portion 52c of bearing body 52 and the groove 53b of guide plate 53, thus can increase backlash freedom degree between the two, thus assembling improved.
Because will be, so as the 1st, 2 embodiment, issuablely in the time of can preventing because of elastic plate and Ball support portion butt reverse pinning of causing as the elastic part 52d of elastic force apparatus and bearing body 52 ester moulding integratedly.
Again, in the 3rd embodiment, because elastic part 52d and bearing body 52 ester moulding integratedly, so As time goes on its precompression reduces gradually, the reduction of this precompression also has the effect that prevents frictional force increase between motor rotation axis 3 and ball 19.
Promptly, owing to As time goes on the lubricating oil of coating around ball 19 lose its lubrification similarly, so if the precompression of elastic part 52d is a steady state value, then just be created in the problem that frictional force increases between motor rotation axis 3 and the ball 19, but the precompression of above-mentioned elastic part 52d is descending, so can prevent the increase of frictional force.
In addition, the various embodiments described above are preferred embodiments of the present invention, but are not limited thereto, and can carry out various distortion without departing from the spirit and scope of the present invention.For example, the circular port of the Ball support portion of the ball of packing into can not be a cylindrical shape, and other shapes such as hemisphere or peviform also can.
The rotation preventing structure of bearing body not necessarily will be set in addition.
Again, bearing body is applied the elastic part and the spring wrist of elastic force, is equally spaced being configured on 3 positions in the above-described embodiments, as long as but can balancedly apply elastic force to bearing body vertically, and bearing body can move smoothly, also can be with 2 positions and equally spaced configuration.
Above-mentioned elastic part and spring wrist also can 4 with upper part and equally spaced configuration.
As thrust bearing, without ball, also can replace and shown in Figure 16 (A), hemisphere be made on the top of motor rotation axis 3, or shown in Figure 16 (B), the part with motor rotation axis 3 butts of Ball support portion 26 be made hemispherical 26a.
Like this, preferably thrust bearing is not the rolling bearing with 2 above balls, and has been to use 1 ball, or the bearing surface of shape is the sliding bearing of curved surface as Figure 16 (A), (B), with the stability that improves thrust bearing etc., but also can adopt other bearing arrangement such as rolling bearing.
As above explanation owing to there is not the metal bearing that tradition exists in motor of the present invention, and is the structure at the axial lead bearing body, so can prevent the generation of the snapping sound that the rotation because of the slippage loss of motor rotation axis or rotating shaft brings reliably.
In addition and since the elastic part of elastic component with equal equal angles be configured in a plurality ofly above-mentioned motor rotation axis around, so by above-mentioned bearing body, can equilibrium and vertically above-mentioned motor rotation axis is applied elastic force.
Claims (11)
1. motor, have the 1st thrust bearing of supporting motor rotating shaft one end and the described motor rotation axis other end of supporting to described motor rotation axis axially carry out the 2nd spacing thrust bearing, it is characterized in that,
Described the 1st thrust bearing has: supporting motor rotating shaft one end and can be along the axially movable bearing body of described motor rotation axis; Can be to described bearing body along the described ways that leads with moving axially; By described bearing body to described motor rotation axis along the described elastic force apparatus that axially applies elastic force;
Described elastic force apparatus has with a plurality of elastic part of impartial angle configurations around described motor rotation axis,
Motor rotation axis (4) has rotor magnet (17),
Be provided with rotor magnet (17) in the stator department (2),
The other end of motor is given prominence to and is supported by the 2nd thrust bearing (5) from the other end of stator department,
With an end of the other end opposition side of described stator department, the ways (8) that bearing body (7) is led is installed,
Described ways has the location division of relative motor stator portion location usefulness, and the described location division of supporting between the stator poles tooth is to position described ways relative stator.
2. motor as claimed in claim 1 is characterized in that: described elastic part is provided with 3 places with 120 ° of intervals.
3. motor as claimed in claim 1 is characterized in that: described elastic part with and described bearing body support described motor rotation axis the face opposition side the face butt and described bearing body is applied elastic force.
4. motor as claimed in claim 1 is characterized in that: described elastic part and described bearing body are set as one.
5. motor as claimed in claim 1 is characterized in that: on described bearing body, be provided with and cooperate with described ways and prevent that the rotation of described bearing body rotation from preventing portion.
6. motor as claimed in claim 5 is characterized in that: described ways has the slot part that the described rotation that embeds described bearing body prevents portion.
7. motor as claimed in claim 6 is characterized in that: the described elastic part of configuration on described slot part, but be formed with the inclined plane for described ways for making the described bearing body of described elastic part crimping.
8. motor as claimed in claim 3 is characterized in that: described elastic part is a flat spring.
9. motor as claimed in claim 8 is characterized in that: the top of described elastic part has the big joint portion of width, and described joint portion cooperates with the rotation portion of preventing of described bearing body.
10. motor as claimed in claim 1 is characterized in that: described ways is a thin plate, and the guide part that described bearing body is led die-cut digging and forming from the thin plate.
11. motor as claimed in claim 4 is characterized in that: on described ways, be formed be formed on described bearing body on elastic part combine to prevent the groove of described bearing body rotation.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP274075/1996 | 1996-09-25 | ||
| JP27407596A JP3393020B2 (en) | 1995-09-26 | 1996-09-25 | Stepping motor |
| JP274075/96 | 1996-09-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1177856A CN1177856A (en) | 1998-04-01 |
| CN1153340C true CN1153340C (en) | 2004-06-09 |
Family
ID=34385892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB971103011A Expired - Lifetime CN1153340C (en) | 1996-09-25 | 1997-03-28 | Step-by-step motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1153340C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4078177B2 (en) * | 2002-10-11 | 2008-04-23 | 日本電産サンキョー株式会社 | motor |
| JP2007202388A (en) * | 2005-12-27 | 2007-08-09 | Sanyo Electric Co Ltd | Motor |
| JP5323473B2 (en) * | 2008-12-26 | 2013-10-23 | 日本電産サンキョー株式会社 | motor |
| JP5780815B2 (en) * | 2011-04-19 | 2015-09-16 | 日本電産サンキョー株式会社 | motor |
| JP5977070B2 (en) * | 2012-04-18 | 2016-08-24 | 日本電産サンキョー株式会社 | motor |
| JP7496268B2 (en) * | 2020-09-11 | 2024-06-06 | ニデックインスツルメンツ株式会社 | motor |
-
1997
- 1997-03-28 CN CNB971103011A patent/CN1153340C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CN1177856A (en) | 1998-04-01 |
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