CN203562870U

CN203562870U - Motor

Info

Publication number: CN203562870U
Application number: CN201320657323.9U
Authority: CN
Inventors: 米山秀和
Original assignee: Sankyo Seiki Manufacturing Co Ltd
Current assignee: Nidec Instruments Corp
Priority date: 2012-10-31
Filing date: 2013-10-23
Publication date: 2014-04-23
Anticipated expiration: 2023-10-23
Also published as: CN103795173B; CN103795173A; JP2014090609A; JP5988832B2

Abstract

The utility model provides a motor which can maintain proper positional relation and enables a bearing component and an end plate to be overlapped efficiently. The motor (1) is characterized in that in the structure that the bearing component (70) arranged to the end of a stator (40) is maintained between the end plate (80) and the stator (40) through the end plate (80), the bearing component (70) is provided with engaging parts (73) at a plurality of positions in the circumferential direction, the engaging parts (73) overlapping the end face (49) of the stator (40), and the end plate (80) is provided with a plurality of opening parts (83) at a plurality of positions in the circumferential direction, the opening parts (83) allowing the engaging parts to be embedded in. When the bearing component (70) and the end plate (80) are mutual located in the circumferential direction through contact between side parts (731, 732) of the engaging parts (73) of the bearing component (70) and side parts (831, 832) of the opening parts (83) of the end plate (80), the engaging part (73a) and the opening part (83a) at one position in the plurality of the positions are used for location.

Description

Motor

Technical field

The utility model relates to a kind of parts of bearings and by end plate, remains on the motor of the end of stator.

Background technology

For motors such as stepper motors, once proposed a kind of form by rotating shaft supporting for can rotate Bearning mechanism time, by end plate, between end plate and stator, keep being disposed at the structure (referring to Patent Document 1) of parts of bearings of the end of stator.

In the motor of described structure, parts of bearings has the holding section of the rectangular shape overlapping with the end face of stator at circumferential a plurality of positions, and end plate has the peristome of the rectangular shape embedding respectively for a plurality of holding sections at circumferential a plurality of positions.Therefore, end plate is not overlapping with the holding section of parts of bearings in motor axis direction, so can dwindle the size of the motor axis direction of stator periphery.And the circumferential size of a plurality of holding sections (width dimensions) is roughly the same with the circumferential size (width dimensions) of a plurality of peristomes.Therefore,, in the time of in holding section is embedded into peristome, the outer rim of the circumferential both sides of a plurality of holding sections contacts with the inner edge of the circumferential both sides of a plurality of peristomes respectively, so can carry out the circumferential location between parts of bearings and end plate.

Patent documentation 1: TOHKEMY 2004-140925 communique

But, in the situation that the structure that patent documentation 1 is recorded, owing to being embedded into respectively by a plurality of holding sections, in a plurality of peristomes, carry out the circumferential location between parts of bearings and end plate, if the arbitrary parts therefore in a plurality of holding sections and a plurality of peristome produce the low position of dimensional accuracy, holding section cannot be embedded in peristome, thereby exist, be difficult to the suitably problem of overlapping parts of bearings and end plate.

Utility model content

In view of above problem, problem of the present utility model is to provide a kind of can keep suitable position relationship and the motor of overlapping parts of bearings and end plate efficiently.

In order to solve above-mentioned problem, motor of the present utility model has: rotor, and it has rotating shaft; Stator, it is around described rotor configuration; Parts of bearings, an end of its motor axis direction at described stator supports described rotating shaft for rotating; And end plate, it stresses to fold from contrary with described stator one with respect to described parts of bearings, and keep described parts of bearings between described end plate and described stator, it is characterized in that, described parts of bearings has a plurality of holding sections overlapping with the end face of described stator at circumferential a plurality of positions, described end plate has a plurality of peristomes that embed respectively for described a plurality of holding sections at circumferential a plurality of positions, described holding section and described peristome by a position in described a plurality of positions carry out the circumferential location between described parts of bearings and described end plate.

In the utility model, when being made as the structure of parts of bearings of the end that keeps being disposed at stator by end plate between end plate and stator, parts of bearings has the holding section overlapping with the end face of stator at circumferential a plurality of positions, and end plate has the peristome embedding respectively for a plurality of holding sections at circumferential a plurality of positions.Therefore, end plate is not overlapping with the holding section of parts of bearings in motor axis direction, so can dwindle the size of the motor axis direction of stator periphery.At this, when the circumferential location of carrying out between parts of bearings and end plate, because holding section and the peristome at a position by a plurality of positions positions, therefore in the holding section at a described position and peristome, dimensional accuracy is high, and about holding section and the peristome at other positions, as long as holding section can be embedded into, in peristome, just do not need high dimensional accuracy.Therefore, difficult generation cannot be embedded into holding section the situation in peristome, overlapping parts of bearings and end plate efficiently so can keep suitable position relationship.

In the utility model, at least one edge in the edge of the edge of a side that the side with described stator place in the outer peripheral face of preferred described holding section is contrary and a side at the described stator place in the inner peripheral surface of described peristome becomes the conical surface.Therefore according to this structure, can easily holding section be embedded in peristome, overlapping parts of bearings and end plate efficiently.

In the utility model, preferably described a plurality of holding sections are outstanding towards radial outside from the central side of described parts of bearings respectively, by the side surface part of extending towards radial outside in described holding section and the inner peripheral surface butt of described peristome, carry out the circumferential location between described parts of bearings and described end plate.According to this structure, can carry out the circumferential location between parts of bearings and end plate with simple structure.

In the utility model, preferably the circumferential width size of the holding section that is formed at a described position in described a plurality of holding sections and described a plurality of peristome and peristome is less than the circumferential width size of other holding sections and peristome.

In the utility model, preferred described end plate is force application part, described force application part has the plate spring part of the described axial rotary motor axis direction application of force, and this plate spring part is become the angle direction at the arbitrary holding section place of terminal part in described a plurality of holding sections by otch bent plate.And preferred described plate spring part is become terminal part towards the angle direction that is formed at the place, holding section at a described position by otch bent plate.

In the utility model, preferably the side along in the part of circumferential extension along in the part of circumferential extension and the inner peripheral surface of described peristome in the outer peripheral face of described holding section is formed with protuberance, described protuberance in the outer peripheral face of described holding section along in the part of circumferential extension and the inner peripheral surface of described peristome along the opposing party in the part of circumferential extension outstanding and with this opposing party's butt, thereby carry out the radial location between described parts of bearings and described end plate.According to this structure, the outer peripheral face of holding section is radially contacting via protuberance with the inner peripheral surface of peristome, therefore, when overlapping parts of bearings and end plate, can easily holding section be embedded in peristome.

In the utility model, preferred described protuberance has semicircular flat shape.According to this structure, even in the situation that cause holding section to be difficult for being embedded in peristome because of the impact of dimensional tolerance, due to as long as apply slightly large power in holding section is embedded into peristome time, protuberance will be out of shape, and therefore when overlapping parts of bearings and end plate, also can easily holding section be embedded in peristome.

In the utility model, preferably at the outer peripheral face of all described holding sections or the inner peripheral surface of all described peristomes, be formed with described protuberance.According to this structure, can carry out reliably the radial location between parts of bearings and end plate, also can easily holding section be embedded in peristome in this case.

In the utility model, can adopt following structure: described holding section and described peristome be shape in the form of a substantially rectangular, described protuberance is formed on the part of outermost radial outside of described holding section or the part of the outermost radial outside of described peristome.

In the utility model, preferred described protuberance is formed on described parts of bearings one side, and the edge of the side that the side with described stator place in the outer peripheral face of described protuberance is contrary becomes the conical surface.According to this structure, when overlapping parts of bearings and end plate, can easily holding section be embedded in peristome.

In the utility model, preferred described protuberance is formed on described end plate one side, and the edge of a side at the described stator place in the outer peripheral face of described protuberance becomes the conical surface.According to this structure, when overlapping parts of bearings and end plate, can easily holding section be embedded in peristome.

In the utility model, preferably described a plurality of holding section is along circumferentially with roughly equal angles interval formation, and described a plurality of peristomes edge is circumferentially with roughly equal angles interval formation.

In the utility model, preferred described holding section and described peristome are formed with respectively three.

In the utility model, preferred described protuberance is formed at the part along circumferential extension in the outer peripheral face of described holding section, the described protuberance that is formed at the holding section forming at described position is formed on the circumferential central authorities of this holding section, the described protuberance that is formed at other holding sections be formed on from the circumferential central authorities of this holding section towards a lateral deviation from position.

In the utility model, be preferably formed in the width dimensions of holding section at a described position and the difference of the width dimensions of peristome less than the difference of the width dimensions of the width dimensions of other holding sections and peristome.

In the utility model, when being made as the structure of parts of bearings of the end that keeps being disposed at stator by end plate between end plate and stator, parts of bearings has the holding section overlapping with the end face of stator at circumferential a plurality of positions, and end plate has the peristome embedding respectively for a plurality of holding sections at circumferential a plurality of positions.Therefore, end plate is not overlapping with the holding section of parts of bearings in motor axis direction, so can dwindle the size of the motor axis direction of stator periphery.At this, during due to circumferential location carrying out between parts of bearings and end plate, holding section and peristome by a position in a plurality of positions position, therefore in the holding section at a described position and peristome, dimensional accuracy is high, and about holding section and the peristome at other positions, as long as holding section can be embedded into, in peristome, just do not need high dimensional accuracy.Therefore, difficult generation cannot be embedded into holding section the situation in peristome, overlapping parts of bearings and end plate efficiently so can keep suitable position relationship.

Accompanying drawing explanation

Fig. 1 (a), Fig. 1 (b) are respectively the half sectional views of application motor of the present utility model and from the rearview of the motor observed of output opposition side.

Fig. 2 (a), Fig. 2 (b), Fig. 2 (c) be respectively from the outstanding unilateral observation of utmost point tooth to vertical view, the end view of external stator core of the related motor of execution mode of the present utility model 1 and the cut-out end view drawing while cutting off along P-O-P ' line.

Fig. 3 (a), Fig. 3 (b), Fig. 3 (c), Fig. 3 (d), Fig. 3 (e) are respectively the cutaway views that the vertical view of the parts of bearings of the related motor of the execution mode of the present utility model 1 observed from outlet side, upward view, end view, Q-Q ' cutaway view and the amplification observed from output opposition side illustrate the end of Q ' side.

Fig. 4 (a), Fig. 4 (b), Fig. 4 (c), Fig. 4 (d) are respectively the vertical view of the end plate of the related motor of the execution mode of the present utility model 1 observed from outlet side, upward view, end view and the R-R ' cutaway view of the end plate observed from output opposition side.

Fig. 5 (a), Fig. 5 (b) be respectively from output opposition side (end plate side), observe end plate is overlapped to key diagram and the cutaway view of the state after parts of bearings the related motor of execution mode 1 of the present utility model.

Fig. 6 is the key diagram that makes end plate and the overlapping state of parts of bearings in the related motor of execution mode 2 of the present utility model.

Fig. 7 is the cutaway view of the end plate of the related motor of execution mode 3 of the present utility model.

Embodiment

With reference to accompanying drawing, to applying an example of motor of the present utility model, describe.In addition, in the following description, in motor axis direction L, the rotating shaft 50 of take is outlet side L1 from stator 40 outstanding sides, take and as exporting opposition side L2, describes from the contrary side of the outstanding side of stator 40 with rotating shaft 50.

Execution mode 1

Overall structure

Fig. 1 (a), Fig. 1 (b) are the half sectional views of motor and from the rearview of the motor observed of output opposition side.

Motor 1 shown in Fig. 1 (a), Fig. 1 (b) be in the optical disc apparatus such as DVD and Blu-ray Disc for the stepper motor of bare headed driving etc., this motor 1 has stator 40 cylindraceous.Stator 40 have A mutually the stator of use and B mutually the stator of use in the stacked structure of motor axis direction L.Therefore, in stator 40, be wound with two coil rack 2(First Line ring framework 2A and the second coil rack 2B of the ring-type of winding wire 20) in motor axis direction L overlay configuration, described coil rack 2 respectively overlay configuration have inner-stator iron core 3 and external stator core 4.More particularly, in First Line ring framework 2A, both sides overlay configuration at motor axis direction L has the inner-stator iron core 3A of ring-type and the external stator core 4A that cross section is U word shape, in the second coil rack 2B, in the both sides overlay configuration of motor axis direction L, there are the inner-stator iron core 3B of ring-type and the external stator core 4B that cross section is U word shape.Inner peripheral surface at First Line ring framework 2A and the second coil rack 2B is along the structure of a plurality of utmost point teeth 31,41 of circumferential array inner-stator iron core 3A, 3B and external stator core 4A, 4B.Thus, form the stator cylindraceous 40 with rotor configuration hole 30, at the radially inner side of stator 40 with coaxial shape configuration rotor 5.In the present embodiment, external stator core 4A, 4B extend to respectively the radial outside of First Line ring framework 2A and the second coil rack 2B, thereby form motor shell 10.

Coil rack 2(First Line ring framework 2A and the second coil rack 2B) be formed from a resin, at coil rack 2, be formed with and keep terminal 91(

terminal

91A, 91B) terminal board 25(25A, 25B).Terminal 91(

terminal

91A, 91B) outstanding from motor shell 10 to radial outside, and be connected with the distribution materials (not shown) such as flexible wiring substrate.

In rotor 5, rotating shaft 50 extends along motor axis direction L, and by binding agent 56, is connected with permanent magnet 59 cylindraceous in the position by output opposition side L2 of rotating shaft 50.Inner side in rotor configuration hole 30, the outer peripheral face 590 of permanent magnet 59 is opposed across predetermined space at the utmost point tooth 31,41 of radially inner side and stator 40.Rotating shaft 50 consists of metal materials such as stainless steel, brass, aluminium, and the outer peripheral face 57 from the outstanding side (outlet side L1) of stator 40 in the outer peripheral face 57 of rotating shaft 50 is formed with helicla flute 58, and this helicla flute 58 engages with the tooth bar that is formed on shaven head (not shown) side.The diameter of the part that is formed with helicla flute 58 in rotating shaft 50 is larger than the diameter of part that is connected with permanent magnet 59.

The structure of plate 65

With respect to stator 40, at outlet side L1, be provided with plate 65.Plate 65 has: the supporting board 652 of the end 51 of the outlet side L1 of fixedly board 651 end face of outlet side L1 of end face 48(motor shell 10 that is fixed on the outlet side L1 of stator 40 by methods such as welding), and supporting rotating shaft 50 opposed with fixing board 651 at outlet side L1 and along motor axis direction L extend be connected and fixed board 651 and supporting board 652 be connected board 653.At fixing board 651, be formed with the hole 650 that rotating shaft 50 is connected.

The bearing arrangement of outlet side L1

In plate 65, at supporting board 652, form the Bearning mechanism 6 that has outlet side L1, the Bearning mechanism 6 of this outlet side L1 motor axis direction L and radially by 51 supportings of the end of the outlet side L1 of rotating shaft 50 for rotating.In described Bearning mechanism 6, at the supporting board 652 of plate 65, be fixed with the parts of bearings 60 of outlet side L1, the end 51 of the outlet side L1 of rotating shaft 50 embeds and is bearing in the inner side of recess 61, and this recess 61 caves in towards outlet side L1 at the end face of the output opposition side L2 of parts of bearings 60.Parts of bearings 60 has at the large-diameter portion 64 being formed through under the state in the hole 656 of the supporting board 652 of plate 65 with the face butt of the output opposition side L2 of supporting board 652, by large-diameter portion 64 restriction parts of bearings 60, to outlet side L1, moves.In rotating shaft 50, the diameter of the end 51 of outlet side L1 is less than the diameter of part that is formed with helicla flute 58, and the end 51 of outlet side L1 is processed to hemispherical.

The structure of external stator core 4B

Below, before the detailed structure of the Bearning mechanism 7 of explanation output opposition side L2, to form stator 40 output opposition side L2 end face B mutually the structure of the external stator core 4B of use describe.

Fig. 2 (a), Fig. 2 (b), Fig. 2 (c) be from the outstanding unilateral observation of utmost point tooth 41 to vertical view, the end view of external stator core 4B and the cut-out end view drawing while cutting off along P-O-P ' line.

In Fig. 1 (a)～Fig. 2 (c), in the motor 1 of present embodiment, because external stator core 4B forms as the housing parts that forms motor shell 10, so its cross section has U word shape.More particularly, external stator core 4B has a plurality of utmost point teeth 41 that annulus portion 45, the outlet side L1 from the inner peripheral of annulus portion 45 to motor axis direction L formed by otch bent plate and the outlet side L1 from the outer peripheral edges of annulus portion 45 to motor axis direction L extends and in the opposed cylinder cylindraceous of radial outside and utmost point tooth 41 portion 46, the end face 49 of the output opposition side L2 of the face formation stator 40 of the output opposition side L2 by annulus portion 45.Described external stator core 4B and coil rack 2 overlay configuration that are wound with winding wire 20, consequently, be the state of layout line ring framework 2 between utmost point tooth 41 and cylinder portion 46.At this, the inner peripheral in annulus portion 45, is become towards radial outside and is cut the recess 451 forming by the part of utmost point tooth 41 clampings along circumferentially adjacent, and described recess 451 carries out the circumferential location of parts of bearings 70 described later.In the part of recess 451, be formed with further and be the circular-arc otch 452 forming that cut to radial outside, when the location of carrying out between external stator core 4B and parts of bearings 70, at described otch 452, insert alignment pins (instrument/not shown).

At the end edge of cylinder portion 46, be formed with in opposed position and cut along motor axis direction L two otch 461,468 that form, when combination external stator core 4B and coil rack 2, external stator core 4B and coil rack 2 are aligned in the overlapping mode of motor axis direction L with the terminal board 25 of coil rack 2 with the large otch 461 of the circumferential size in otch 461,468.

In the present embodiment, the both ends of otch 461 become semicircular shallow cut 462, are being formed with than the stage portion 463 of the bottom shallow single order of otch 461 along circumferentially adjacent position with otch 462.As shown in Fig. 1 (a), from the outer peripheral edges of inner-stator iron core 3B, to the outstanding protuberance 36 of radial outside, enter the two ends of described otch 461, stage portion 463 is from protuberance 36 butts of motor axis direction L and inner-stator iron core 3B, thereby carries out the location of inner-stator iron core 3B.

And be inserted with from the outer peripheral edges of inner-stator iron core 3B to the outstanding protuberance 35 of radial outside at the little otch 468 of circumferential size, the bottom of otch 468 is from protuberance 35 butts of motor axis direction L and inner-stator iron core 3B, thereby carries out the location of inner-stator iron core 3B.In addition, the both ends of otch 468 are formed with and are further semicircle shape and profoundly remove the otch 469 forming.

In addition, A mutually use external stator core 4A and B mutually the external stator core 4B of use be identical structure, and with motor axis direction L balanced configuration.

The Sketch of the Bearning mechanism 7 of output opposition side L2

As shown in Fig. 1 (a), Fig. 1 (b), in the motor 1 of present embodiment, end 52 at the output opposition side L2 of rotating shaft 50 forms the Bearning mechanism 7 that has output opposition side L2, and the Bearning mechanism 7 of this output opposition side L2 is at motor axis direction L and radially the end of the output opposition side L2 of rotating shaft 50 52 is supported as rotating.In the present embodiment, end face at the output opposition side L2 of permanent magnet 59 is formed with the recess 595 towards outlet side L1 depression, Bearning mechanism 7 will be from permanent magnet 59 in the inner side of recess 595 towards end 52 supportings of the output opposition side L2 of the outstanding rotating shaft 50 of output opposition side L2 for rotating.In rotating shaft 50, the diameter of the end 52 of output opposition side L2 is slightly less than the diameter of part that is connected with permanent magnet 59, and the end 52 of exporting opposition side L2 is processed to hemispherical.

In the Bearning mechanism 7 of output opposition side L2, the discoid parts of bearings 70 of surrounding's configuration in the end 52 of the output opposition side L2 of rotating shaft 50, the end 52 of rotating shaft 50 be embedded in parts of bearings 70 cylindrical portion 71 inner side and be supported to and can rotate.With respect to parts of bearings 70, at output opposition side L2, dispose end plate 80, parts of bearings 70 remains between end plate 80 and stator 40.At this, end plate 80 is as rotating shaft 50 is formed towards the force application part of the outlet side L1 application of force.More particularly, end plate 80 has by welding and waits the plectane portion 81 of end face 49 of the output opposition side L2 that is fixed on stator 40 and the plate spring part 85 being formed by otch bent plate at the middle body of plectane portion 81, plectane portion 81 and stator 40 between keep parts of bearings 70 end, plate spring part 85 by rotating shaft 50 towards the outlet side L1 application of force.At this, at the outlet side L1 of rotating shaft 50, form the Bearning mechanism 6 that has outlet side L1, the Bearning mechanism 6 of this outlet side L1 motor axis direction L and radially by 51 supportings of the end of the outlet side L1 of rotating shaft 50 for rotating.Therefore, rotating shaft 50 is in being biased into the end 51 of outlet side L1 and the state of Bearning mechanism 6 butts, so can prevent rotating shaft 50 becoming flexible at motor axis direction L when rotating shaft 50 rotation.

The detailed structure of parts of bearings 70

Fig. 3 (a), Fig. 3 (b), Fig. 3 (c), Fig. 3 (d), Fig. 3 (e) are respectively the cutaway views that the vertical view of the parts of bearings 70 observed from outlet side L1, upward view, end view, Q-Q ' cutaway view and the amplification observed from output opposition side L2 illustrate the end of Q ' side.

In Fig. 3 (a)～Fig. 3 (e), parts of bearings 70 is the parts that are formed from a resin, and it comprises having in the cylindrical portion 71 in the hole 79 of the end 52 of inner side supporting rotating shaft 50 with at the round plate 72 of the end hole enlargement of the output opposition side L2 of cylindrical portion 71.And the mask of the output opposition side L2 of the round plate 72 in parts of bearings 70 has a plurality of holding sections 73 of extending towards radial outside from central side, described a plurality of holding sections 73 are connected at central side.In the present embodiment, as holding section 73, with equal angles interval roughly, be formed with three holding section 73a, 73b, 73c, described holding section 73a, 73b, 73c all have essentially rectangular shape.The overall dimension of described parts of bearings 70 is than the annulus portion 45 of the end face 49(external stator core 4B of the output opposition side L2 of stator 40) overall dimension little, the outside dimension of round plate 72 is equal to or slightly greater than the internal diameter size (internal diameter size of the annulus portion 45 of external stator core 4B) of stator 40.

With respect to the holding section 73a in three holding section 73a, 73b, 73c, at opposition side, be formed with tabular rotation prevention portion 74, the outstanding size towards radial outside of described rotation prevention portion 74 is less than the outstanding size toward the outer side of holding section 73a, 73b, 73c.At this, rotation prevention portion 74 is outstanding towards radial outside from the outer peripheral face of round plate 72, and outstanding facing to radial outside from the output opposition side L2 of round plate 72 of holding section 73.Therefore, rotation prevention portion 74 is positioned at the position by outlet side L1 than holding section 73.Between rotation prevention portion 74 and holding section 73a, be formed with the spring portion that extends to the central authorities (forming porose 79 position) of parts of bearings 70 from rotation prevention portion 74 and hold with recess 75, described spring portion holds with recess 75 to be become from outer circumferential side towards central side to the conical surface of outlet side L1 inclination.

In the parts of bearings 70 forming like this, holding section 73a, 73b, 73c have same shape substantially, thereby and have a pair of side surface part 731,732 of extending towards radial outside with the most peripheral side radially along circumferentially extending the terminal part 733 being connected with side surface part 731,732.

And the arbitrary holding section in three holding section 73a, 73b, 73c is all formed with towards the outstanding protuberance 734 of radial outside near the circumferential central authorities of portion 733 endways.In the present embodiment, three protuberances 734 are along circumferentially forming with equal angles interval.Therefore, the protuberance 734 that is formed at holding section 73a is formed on the circumferential central authorities of holding section 73a, and the protuberance 734 that is formed at holding section 73b, 73c be formed on from circumferential mediad one lateral deviation of holding section 73b, 73c from position.And in the present embodiment, protuberance 734 has semicircular flat shape.

At this, if the circumferential size (width dimensions) of three holding section 73a, 73b, 73c is made as respectively to W73a, W73b, W73c, described width dimensions has following magnitude relationship:

W73a＜W73b＝73c。

That is, the width dimensions W73a of holding section 73a is less than width dimensions W73b, the W73c of other holding sections 73b, 73c.

In the present embodiment, at three holding sections 73(holding section 73a, 73b, 73c) comprise being formed with the position of protuberance 734 and being formed with spring portion and hold in the whole outer peripheral face by the part of recess 75, the edge of a side contrary with a side at stator 40 places (output opposition side L2) becomes conical surface 76(fillet surface).

The detailed structure of end plate 80

Fig. 4 (a), Fig. 4 (b), Fig. 4 (c), Fig. 4 (d) are respectively the vertical view of the end plate 80 observed from outlet side L1, upward view, end view and the R-R ' cutaway view of the end plate 80 observed from output opposition side L2.

In Fig. 4 (a)～Fig. 4 (d), end plate 80 is by having plectane portion 81, being tilted the plate spring part 85 of the rectangular shape that ground otch bent plate forms and the metallic plate of the peristome 83 that extends towards radial outside from the central authorities of plectane portion 81 forms at the middle body of plectane portion 81.In end plate 80, as peristome 83, at circumferential a plurality of positions, with equal angles interval roughly, be formed with peristome 83a, 83b, 83c, and described peristome 83a, 83b, 83c are connected at central side.And the terminal part 85a of plate spring part 85 is towards the angle direction at peristome 83a place.The overall dimension of described end plate 80 is than the annulus portion 45 of the end face 49(external stator core 4B of the output opposition side L2 of stator 40) overall dimension little, and larger than the overall dimension of parts of bearings 70.

In the present embodiment, the outer peripheral edges of plectane portion 81 are cut at circumferential a plurality of positions the shape that is in line, and are formed with three place's straight line portioies 811,812,813 thus with equal angles interval roughly.In the present embodiment, in the angle position being equivalent between peristome 83a, 83b, 83c, be formed with straight line portion 811,812,813.

In the end plate 80 forming like this, three peristome 83a, 83b, 83c all have essentially rectangular shape.That is, thus peristome 83a, 83b, 83c all have a pair of side surface part 831,832 of extending towards radial outside with the most peripheral side radially along circumferentially extending the terminal part 833 being connected with side surface part 831,832.In addition, in plectane portion 81, with concentric shape, be formed with low step 87.

At this, plate spring part 85 is formed on when end plate 80 being overlapped to the output opposition side L2 of parts of bearings 70 and the spring portion of parts of bearings 70 holds with the overlapping position of recess 75.And, the position that three peristome 83a, 83b, 83c are respectively formed at when end plate 80 being overlapped to the output opposition side L2 of parts of bearings 70 and holding section 73a, 73b, the 73c of parts of bearings 70 are overlapping, holding section 73a, the 73b of parts of bearings 70,73c are embedded in respectively in peristome 83a, 83b, the 83c of end plate 80.

And if peristome 83a, 83b, 83c circumferential size (width dimensions) is separately made as respectively to W83a, W83b, W83c, described width dimensions has following magnitude relationship:

W83a＜W83b＝W83c。

That is, the width dimensions W83a of peristome 83a is less than width dimensions W83b, the W83c of other peristomes 83b, 83c.

And, if relatively width dimensions W83a, the W83b of peristome 83a, 83b, 83c, W83c and with reference to figure 3(a) holding section 73a, 73b, width dimensions W73a, the W73b of 73c, W73c that～Fig. 3 (e) illustrates, become following relation:

W83a≈W73a

W83b＞W73b

W83c＞W73c。

That is, the width dimensions W83a of peristome 83a is slightly larger than the width dimensions W73a of holding section 73a, and width dimensions W83b, the W83c of other peristomes 83b, 83c are significantly greater than width dimensions W73b, the W73c of holding section 73b, 73c on the contrary.Therefore, when end plate 80 being overlapped to the output opposition side L2 of parts of bearings 70, the holding section 73a of parts of bearings 70 be embedded into performance in the peristome 83a of end plate 80 at circumferential location bearing parts 70 function with end plate 80, even if contrary holding section 73b, 73c are embedded into, in peristome 83b, the 83c of end plate 80, do not bring into play the function with end plate 80 at circumferential location bearing parts 70 yet.

And, the radial dimension of peristome 83a, 83b, 83c (length dimension) and the holding section 73a, the 73b that comprise protuberance 734 of parts of bearings 70, the radial dimension (length dimension) of 73c about equally.Therefore, when end plate 80 being overlapped to the output opposition side L2 of parts of bearings 70, holding section 73a, the 73b of parts of bearings 70,73c via protuberance 734 with peristome 83a, the 83b of end plate 80, terminal part 833 butts of 83c, thereby performance at radial location parts of bearings 70 function with end plate 80.

The assembling procedure of Bearning mechanism 7

Fig. 5 (a), Fig. 5 (b) are from output opposition side L2(end plate 80 sides) observe end plate 80 is overlapped to key diagram and the cutaway view of the state parts of bearings 70.In addition, in Fig. 5 (a), the oblique line indicating towards lower right at end plate 80.

In the manufacturing process of the motor 1 of present embodiment, when assembling Bearning mechanism 7, after plate 65 is arranged on to stator 40, at the inner side of stator 40 configuration rotor 5, afterwards parts of bearings 70 and end plate 80 are arranged on to the end of the output opposition side L2 of stator 40.

Now, after parts of bearings 70 is arranged on to stator 40, overlapping end plate 80.In addition, can also, after end plate 80 is overlapped to parts of bearings 70, parts of bearings 70 and end plate 80 be installed on to stator 40.As shown in Fig. 5 (a), Fig. 5 (b), in arbitrary situation of end plate 80 in above-mentioned two kinds of mounting meanss, all overlap the output opposition side L2 of parts of bearings 70.Under this state, the spring portion that plate spring part 85 is positioned at parts of bearings 70 holds the inner side with recess 75.And, 73(holding section, the holding section 73a of parts of bearings 70,73b, 73c) and be embedded into respectively peristome 83(peristome 83a, 83b, the 83c of end plate 80) in.And the terminal part 85a of plate spring part 85 is towards the angle direction at 73a place, 73Zhong holding section, a plurality of holding section.

At this, when the holding section of parts of bearings 70 73a is embedded in the peristome 83a of end plate 80, side surface part 731,732 respectively with side surface part 831,832 butts, and at circumferentially location bearing parts 70 and end plate 80.But, even if other holding sections 73b, 73c are embedded in peristome 83b, the 83c of end plate 80, owing to there is gap between side surface part 731,732 and side surface part 831,832, do not bring into play the function with end plate 80 at circumferential location bearing parts 70 yet.And, holding section 73a, the 73b of parts of bearings 70,73c via protuberance 734 with peristome 83a, the 83b of end plate 80, terminal part 833 butts of 83c, thereby at radial location parts of bearings 70 and end plate 80.

And, at parts of bearings 70, overlap the annulus portion 45 of end face 49(external stator core 4B of the output opposition side L2 of stator 40) state under, holding section 73(73a, the 73b of parts of bearings 70,73c) overlapping with the end face 49 of the output opposition side L2 of stator 40, thus the position of the motor axis direction L of parts of bearings 70 is determined.And the rotation prevention portion 74 of parts of bearings 70 is embedded in the recess 451 of annulus portion 45 of external stator core 4B, thereby carry out the spline of parts of bearings 70.Now, the bottommost butt of the recess 451 of the terminal part of the rotation prevention portion 74 of parts of bearings 70 and the annulus portion 45 of external stator core 4B.And the round plate 72 of parts of bearings 70 is embedded into the inner side of the annulus portion 45 of external stator core 4B, thereby parts of bearings 70 is coaxial state with respect to stator 40.

Afterwards, as shown in Fig. 1 (b), in the outer peripheral edges of the plectane portion 81 of end plate 80, by the end face 49 of the 45(of the annulus portion stator 40 of straight line portion 811,812,813 and external stator core 4B) weld S.Consequently, parts of bearings 70 is maintained at the annulus portion 45 of end face 49(external stator core 4B of the output opposition side L2 of end plate 80 and stator 40) between.Specifically, end face 49 butts by holding section 73 with stator 40, thus stop parts of bearings 70 to move to outlet side L1, plectane portion 81 butts by round plate 72 with end plate 80, thus stop parts of bearings 70 to move to output opposition side L2.

The main effect of present embodiment

As described above, in the motor 1 of present embodiment, when being made as the structure of parts of bearings 70 of the end that keeps being disposed at stator 40 by end plate 80 between end plate 80 and stator 40, parts of bearings 70 has the holding section 73 overlapping with the end face 49 of stator 40 at circumferential a plurality of positions, and end plate 80 has the peristome 83 embedding respectively for a plurality of holding sections 73 at circumferential a plurality of positions.Therefore, because end plate 80 is not overlapping with the holding section 73 of parts of bearings 70 at motor axis direction L, the size that therefore can dwindle the motor axis direction L of stator 40 peripheries.And because a plurality of positions at parts of bearings 70 are formed with the holding section 73 overlapping with the end face 49 of stator 40, so parts of bearings 70 is supported in the end face 49 of stator 40 with stable state.Especially in the present embodiment, because three places circumferential are formed with holding section 73, so parts of bearings 70 is supported in the end face 49 of stator 40 with stable state.

At this, when the circumferential location of carrying out between parts of bearings 70 and end plate 80, holding section 73a and peristome 83a by a position in a plurality of positions position.Therefore, in the holding section at described position 73a and peristome 83a, dimensional accuracy is high, and about holding section 73b, 73c and peristome 83b, the 83c at other positions, as long as holding section 73 can be embedded into, in peristome 83, just do not need high dimensional accuracy.Therefore, difficult generation cannot be embedded into the situation in peristome 83 by holding section 73, overlapping parts of bearings 70 and end plate 80 efficiently so can keep suitable position relationship.

And, because the width dimensions of the holding section 73a that contributing to circumferential location in a plurality of holding sections 73 and a plurality of peristome 83 and peristome 83a is less than the width dimensions of other holding sections 73b, 73c and peristome 83b, 83c, therefore there are the advantages such as easy acquisition dimensional accuracy, and can carry out reliably making and the assembling of parts.

And, because the plate spring part 85 that is arranged on end plate 80 is from being extended towards a side at other peristome 83 places by the position of two peristomes, 83 clampings, therefore can reasonably configure plate spring part 85.And the terminal part 85a of plate spring part 85 is towards the holding section 73a that contributes to circumferentially to locate and the angle direction at peristome 83a place.Therefore,, as long as confirm the direction of plate spring part 85, just can easily differentiate and contribute to the holding section 73a of circumferential location and the angle direction at peristome 83a place.

And, due to the side surface part 731,732 of extending towards radial outside by the 73a of holding section and the inner edge butt of peristome 83a, carry out the circumferential location between parts of bearings 70 and end plate 80, therefore can carry out the circumferential location between parts of bearings 70 and end plate 80 with simple structure.

And, because the edge of the contrary side of the side with stator 40 places in the outer peripheral face of holding section 73 becomes the conical surface 76, therefore can easily holding section 73 be embedded in peristome 83.Therefore, laminated bearings parts 70 and end plate 80 efficiently.

And, in the present embodiment, because the terminal part 733 along circumferential extension in the outer rim of the holding section 73 at parts of bearings 70 is formed with the protuberance 734 that carries out the radial location between parts of bearings 70 and end plate 80, so the terminal part 833 of the terminal part 733 of the holding section 73 of parts of bearings 70 and the peristome 83 of end plate 80 is radially contacting via protuberance 734.Therefore,, when overlapping parts of bearings 70 and end plate 80, can easily holding section 73 be embedded in peristome 83.

At this, because protuberance 734 has semicircular flat shape, therefore even, in the situation that because the impact of dimensional tolerance causes holding section 73 to be difficult for being embedded in peristome 83, as long as apply slightly large power in holding section 73 is embedded into peristome 84 time, protuberance 734 will be out of shape.Therefore,, when overlapping parts of bearings 70 and end plate 80, can easily holding section 73 be embedded in peristome 83.

And, because protuberance 734 is formed on all holding sections 73, therefore can carry out reliably the radial location between parts of bearings 70 and end plate 80, in this case, also can easily holding section 73 be embedded in peristome 83.And due in the whole outer peripheral face of holding section 73 that comprises the part that is formed with protuberance 734, the edge of a side contrary with a side at stator 40 places becomes the conical surface 76, therefore can easily holding section 73 be embedded in peristome 83.

Execution mode 2

Fig. 6 overlaps end plate 80 key diagram of the state after parts of bearings 70 in the related motor 1 of execution mode 2 of the present utility model.In addition, in Fig. 6, the oblique line indicating towards lower right at end plate 80.And because the basic structure of present embodiment is identical with execution mode 1, also the description thereof will be omitted therefore to divide mark same-sign to common part.

In execution mode 1, in the holding section 73 of parts of bearings 70, be formed with the protuberance 734 that carries out the radial location between parts of bearings 70 and end plate 80, but in the present embodiment, at the terminal part 833 of the peristome 83 of end plate 80, be formed with towards holding section 73 outstanding protuberances 834 as shown in Figure 6, and protuberance 834 has semicircular flat shape.

Also identical with execution mode 1 in this structure, the terminal part 733 of the holding section 73 of parts of bearings 70 is radially contacting via protuberance 834 with the terminal part 833 of the peristome 83 of end plate 80.Therefore,, when overlapping parts of bearings 70 and end plate 80, can easily holding section 73 be embedded in peristome 83.And, because protuberance 834 has semicircular flat shape, therefore even, in the situation that because the impact of dimensional tolerance causes holding section 73 to be difficult for being embedded in peristome 83, as long as apply slightly large power in holding section 73 is embedded into peristome 83 time, protuberance 834 will be out of shape.Therefore, play at overlapping parts of bearings 70 and can easily holding section 73 be embedded into the medium effect identical with execution mode 1 of peristome 83 during with end plate 80.

Execution mode 3

Fig. 7 is the cutaway view of the end plate 80 of the related motor 1 of execution mode 3 of the present utility model.In addition, because the basic structure of present embodiment is identical with execution mode 1, also the description thereof will be omitted therefore to common part, to divide mark same-sign.

In execution mode 1, the edge of the side that the side with stator 40 places in the outer peripheral face of holding section 73 is contrary becomes the conical surface 76, but in the present embodiment, the edge of a side (outlet side L1) at stator 40 places in the inner peripheral surface of the peristome 83 of end plate 80 becomes the conical surface 86 as shown in Figure 7.

Therefore according to this structure, can easily holding section 73 be embedded in peristome 83, overlapping parts of bearings 70 and end plate 80 efficiently.

In addition, as shown in Embodiment 2 when end plate 80 arranges protuberance 834, preferably, in the whole inner peripheral surface that comprises protuberance 834 of the peristome 83 of end plate 80, the edge of a side at stator 40 places (outlet side L1) becomes the conical surface 86.

Other execution modes

In the above-described embodiment, the structure being formed by the annulus portion 45 of external stator core 4B for the end face 49 of stator 40, but the situation that the end face 49 of stator 40 consists of at the housing parts of the annulus portion 45 of external stator core 4B overlay configuration also can be applied the utility model.

And, in the above-described embodiment exemplified with stepper motor, but also can apply the utility model in the motor 1 beyond stepper motor.In the above-described embodiment, end plate 80 forms as the force application part with plate spring part 85, but not thering is plate spring part 85 situation of the end 52 of supporting rotating shaft 50 or by parts of bearings 70 axially mounting rotating shaft 50 and end plate 80 and stator 40 between keep also can applying the utility model in the motor 1 of structure of parts of bearings 70.And, also can adopt the width dimensions structure less than the width dimensions of other peristomes 83 of a peristome 83 in a plurality of peristomes 83 of the identical and end plate 80 of the width dimensions of a plurality of holding sections 73 of parts of bearings 70.And, also can adopt the width dimensions structure larger than the width dimensions of other holding sections 73 of a holding section 73 in a plurality of holding sections 73 of the identical and parts of bearings 70 of the width dimensions of a plurality of peristomes 83 of end plate 80.

Claims

1. a motor, it has:

Rotor, it has rotating shaft;

Stator, it is around described rotor configuration;

Parts of bearings, an end of its motor axis direction at described stator supports described rotating shaft for rotating; And

End plate, it stresses to fold from contrary with described stator one with respect to described parts of bearings, and keeps described parts of bearings between described end plate and described stator,

It is characterized in that,

Described parts of bearings has a plurality of holding sections overlapping with the end face of described stator at circumferential a plurality of positions,

Described end plate has a plurality of peristomes that embed respectively for described a plurality of holding sections at circumferential a plurality of positions,

Described holding section and described peristome by a position in described a plurality of positions carry out the circumferential location between described parts of bearings and described end plate.

2. motor according to claim 1, is characterized in that,

At least one edge in the edge of the edge of a side that the side with described stator place in the outer peripheral face of described holding section is contrary and a side at the described stator place in the inner peripheral surface of described peristome becomes the conical surface.

3. motor according to claim 1, is characterized in that,

Described a plurality of holding section is outstanding towards radial outside from the central side of described parts of bearings respectively,

By the side surface part of extending towards radial outside in described holding section and the inner peripheral surface butt of described peristome, carry out the circumferential location between described parts of bearings and described end plate.

4. motor according to claim 3, is characterized in that,

The holding section that is formed at a described position in described a plurality of holding section and described a plurality of peristome and the circumferential width size of peristome are less than the circumferential width size of other holding sections and peristome.

5. motor according to claim 1, is characterized in that,

Described end plate is force application part, and described force application part has the plate spring part of the described axial rotary motor axis direction application of force,

Described plate spring part is become the angle direction at the arbitrary holding section place of terminal part in described a plurality of holding sections by otch bent plate.

6. motor according to claim 1, is characterized in that,

Described plate spring part is become terminal part towards the angle direction that is formed at the place, holding section at a described position by otch bent plate.

7. motor according to claim 1, is characterized in that,

The side along in the part of circumferential extension along in the part of circumferential extension and the inner peripheral surface of described peristome in the outer peripheral face of described holding section is formed with protuberance, described protuberance in the outer peripheral face of described holding section along in the part of circumferential extension and the inner peripheral surface of described peristome along the opposing party in the part of circumferential extension outstanding and with this opposing party's butt, thereby carry out the radial location between described parts of bearings and described end plate.

8. motor according to claim 7, is characterized in that,

Described protuberance has semicircular flat shape.

9. motor according to claim 7, is characterized in that,

At the outer peripheral face of all described holding sections or the inner peripheral surface of all described peristomes, be formed with described protuberance.

10. motor according to claim 7, is characterized in that,

Described holding section and described peristome be shape in the form of a substantially rectangular,

Described protuberance is formed on the part of outermost radial outside of described holding section or the part of the outermost radial outside of described peristome.

11. motors according to claim 7, is characterized in that,

Described protuberance is formed on described parts of bearings one side,

The edge of the side that the side with described stator place in the outer peripheral face of described protuberance is contrary becomes the conical surface.

12. motors according to claim 7, is characterized in that,

Described protuberance is formed on described end plate one side,

The edge of one side at the described stator place in the outer peripheral face of described protuberance becomes the conical surface.

13. motors according to claim 1, is characterized in that,

Described a plurality of holding section is along circumferentially forming with equal angles interval roughly,

Described a plurality of peristomes edge is circumferentially with roughly equal angles interval formation.

14. motors according to claim 1, is characterized in that,

Described holding section and described peristome are formed with respectively three.

15. motors according to claim 7, is characterized in that,

Described protuberance is formed at the part along circumferential extension in the outer peripheral face of described holding section,

The described protuberance that is formed at the holding section forming at a described position is formed on the circumferential central authorities of this holding section,

The described protuberance that is formed at other holding sections be formed on from the circumferential central authorities of this holding section towards a lateral deviation from position.

16. motors according to claim 3, is characterized in that,

Be formed at the width dimensions of holding section at a described position and the difference of the width dimensions of peristome is less than the difference of the width dimensions of the width dimensions of other holding sections and peristome.