CN208337386U - The connected structure of axis and magnet, motor and feed screw apparatus - Google Patents
The connected structure of axis and magnet, motor and feed screw apparatus Download PDFInfo
- Publication number
- CN208337386U CN208337386U CN201820788314.6U CN201820788314U CN208337386U CN 208337386 U CN208337386 U CN 208337386U CN 201820788314 U CN201820788314 U CN 201820788314U CN 208337386 U CN208337386 U CN 208337386U
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- China
- Prior art keywords
- magnet
- axis
- peripheral surface
- pressure contact
- connected structure
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- Expired - Fee Related
Links
- 230000002093 peripheral effect Effects 0.000 claims abstract description 22
- 239000007767 bonding agent Substances 0.000 claims abstract description 14
- 238000003780 insertion Methods 0.000 description 6
- 230000037431 insertion Effects 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000004323 axial length Effects 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000001815 facial effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000017260 vegetative to reproductive phase transition of meristem Effects 0.000 description 1
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- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The assembly precision of the utility model raising magnet and axis.A kind of connected structure of magnet (10) and the axis (20) for inserting magnet (10), on the component of the side in axis (20) and magnet (10), it has been provided spaced apart multiple pressure contact portions (11a1) in the circumferential, pressure contact portion is to radially projecting and crimp with the component of another party in axis and magnet, in the circumferential between two adjacent pressure contact portions (11a1), ensure there be separate section (S), separate section is for separating the outer peripheral surface of axis (20) and the inner peripheral surface of magnet (10) radially, bonding agent (30) are filled in the separate section (S).
Description
Technical field
The present invention relates to the connected structures of a kind of axis and magnet, and motor and feed screw apparatus with the connected structure.
Background technique
For example, stepper motor shown in patent document 1 includes columned axis, it is supported for rotate freely；Cylinder
The magnet of shape is fixed in the peripheral part of the axis；Coil and magnetic yoke form magnetic field around the magnet.
In the past, in the motor of this spline structure, as the mode being fixed on the magnet on the axis, including indentation or
Use the situation of bonding agent bonding etc..
Existing technical literature
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2006-121832 bulletin
Summary of the invention
Problems to be solved by the invention
However, because magnet is more crisp material, it is possible to because carrying out when by the magnet of axis indentation tubular
It is pressed into the load applied when operation and ruptures.Thus, it is desirable that the outer peripheral surface of inner peripheral surface and axis to magnet carries out high-precision
Processing.
In addition, making the inner peripheral surface of magnet than the outer peripheral surface of the axis when inserting a shaft into magnet and passing through adhesive bonds
Greatly, ensure the gap for filling bonding agent between them.Therefore, because the radial dimension in the gap exists in the circumferential
Deviation, so the case where in the presence of state fixed magnet with opposite eccentric shaft.
The means used to solve the problem
In order to solve the problems, the present invention has with flowering structure.
A kind of connected structure of axis and magnet including magnet and inserts the axis of the magnet, which is characterized in that in the axis and
On the component of a side in the magnet, it is provided spaced apart multiple pressure contact portions in the circumferential, the pressure contact portion is dashed forward to radial
It crimps out and with the component of another party in the axis and the magnet, in the circumferential between two adjacent pressure contact portions,
Ensure there is separate section, the separate section is for dividing the outer peripheral surface of the axis and the inner peripheral surface of the magnet radially
From filled with bonding agent in the separate section.
Detailed description of the invention
Figure 1A, Figure 1B are the perspective views for showing an example of connected structure for axis and magnet of the invention, and Figure 1A is shown
State before inserting a shaft into magnet, Figure 1B show the state after inserting a shaft into magnet.
Fig. 2 is along Figure 1B (II)-(II) line cutaway view Amplified image.
Fig. 3 is the perspective view for showing the motor and feed screw apparatus that have been applicable in same connected structure.
Fig. 4 is along Fig. 3 (IV)-(IV) line cross-sectional view.
Fig. 5 is along Fig. 3 (V)-(V) line cross-sectional view.
Description of symbols
1: the connected structure of axis and magnet
10: magnet
11: axis insertion hole
11a: flat face
11a1: pressure contact portion
11b: circular arc face
20: axis
30: bonding agent
40: motor
A: feed screw apparatus
S: separate section
X: radial dimension
Specific embodiment
In the following, being described with reference to embodiments of the present invention.In the following description, same attached in different drawings
Icon note indicates the position of same function, suitably omits the repeated explanation in each attached drawing.
Figure 1A~Fig. 2 shows an examples of axis of the invention and the connected structure of magnet.
The axis 20 for inserting magnet 10 is fixed by bonding agent 30 for the connected structure 1.
Magnet 10 is substantially cylindric permanent magnet long in the axial direction, will be geomagnetic into the magnetic pole of the pole N and the pole S in circumferential direction
On be alternately arranged.
In the central part of the magnet 10, it is provided with the axis insertion hole 11 for inserting axis 20.
Axis insertion hole 11 is across the substantially cylindric through hole of 10 overall length of magnet.
As shown in Fig. 2, the inner peripheral surface of the axis insertion hole 11 includes: multiple flat face 11a, in the circumferential at equal intervals
(being 4 according to example illustrated) configuration；Circular arc face 11b connects circumferential adjacent two flat face 11a, 11a.
As shown in Fig. 2, the center side of each flat face 11a plays a role as pressure contact portion 11a1, than the circular arc of its two sides
Facial 11b, 11b are more prominent to radially inner side, and crimp with the outer peripheral surface of axis 20.
Pressure contact portion 11a1 is the line contact portion of the cylindric outer peripheral surface of each flat face 11a1 and axis 20, across magnet
10 entire axial length and continuous.
In addition, each circular arc face 11b is the end of adjacent two flat face 11a, 11a to be connected to each other and cross section
For the face of arc-shaped, across the entire axial length of magnet 10 and continuous.
Circular arc face 11b is configured as with the cylindric outer peripheral surface of axis 20 in concentric circles.That is, across each arc surface
In the range of the circumferential overall length of portion 11b, the radial dimension x between the inner peripheral surface of circular arc face 11b and the outer peripheral surface of axis 20 is substantially
It is constant.
As shown in Figure 1A, Figure 1B, axis 20 by oval columnar shaft body portion 21 and on the same axis with the shaft body portion
The lead screw portion 22 of 21 connections is integrally formed.
The axis 20 is to penetrate through the axis insertion hole 11 that shape inserts magnet 10.
Therefore, as shown in Fig. 2, in the circumferential between two adjacent pressure contact portions 11a1,11a1, it is ensured that there is separate section S,
The separate section S is for separating the outer peripheral surface of axis 20 separated by a distance radially with the inner peripheral surface of magnet 10.
In addition, by can by pushing force appropriate by axis 20 be inserted into magnet 10 and not generate loosening in a manner of, to
The tolerance of the outer diameter of the tolerance and axis 20 of size in magnet 10 between opposite flat face 11a, 11a is set.
Separate section S is arranged at the range that flat face 11a is spanned to from circular arc face 11b.Therefore, as shown in Fig. 2,
The circumferential end side of separate section S is formed as its radial dimension x with the gradually smaller wedge shape close to pressure contact portion 11a1.
In addition, being filled with bonding agent 30 in separate section S.For the bonding agent 30, for example, using acrylic resin or
The resinae bonding agent of the mobility of epoxy resin etc..
The fill method of detailed description bonding agent 30 makes this in the case where axis 20 has inserted the state (B referring to Fig.1) of magnet 10
Bonding agent 30 flows into separate section S from axial end side, by separate section S capillary force in the axial direction and circumferential time
Cloth.
Particularly since the circumferential end side of separate section S is formed as wedge shape as described above, so capillary force is strong,
To which bonding agent 30 is penetrated into pressure contact portion 11a1 well.
In addition, magnet 10 and axis 20 are engaged without phase because bonding agent 30 solidifies under defined curing condition
To movement.
Therefore, according to the connected structure 1 of the axis of above structure and magnet, by preventing relative axle 20 from prejudicially installing magnet
10, it can be improved the assembly precision (such as concentricity etc.) of axis 20 Yu magnet 10, and can be improved between axis 20 and magnet 10
Adhesive strength.
Then, the motor and feed screw apparatus of the connected structure 1 for having above structure are illustrated.
As shown in Fig. 3~Fig. 5, feed screw apparatus A has motor 40 and bearing bracket 50, and motor 40 has above-mentioned connected structure
1, make to screw togather from the lead screw portion 22 outstanding of motor 40 with nut member 70.
Motor 40 is stepper motor, has the magnet 10 (rotor) and axis 20 of above structure, and the quilt around magnet 10
The multiple coils 41 and magnetic yoke 42 being axially disposed, magnet 10 and axis 20 are made by the magnetic action of coil 41 and magnetic yoke 42
Rotation.
As shown in figure 4, the section that bearing bracket 50 is formed as spanning to another side from the one end in lead screw portion 22 is in recessed
The shape of shape, one end side are fixed in the end face of magnetic yoke 42, and another side supports bearing 60.
Bearing 60 supports the front end section in the lead screw portion 22 of axis 20, rotates freely it.
Nut member 70 and the external thread part of the periphery in lead screw portion 22 screw togather, and to move in the axial direction without spin
Mode is by support member support (not shown).
In addition, the appended drawing reference 43 in figure is the bearing supported the rear end side of support shaft 20 as that can rotate freely, it is attached
Icon note 44 is the end plate of fixed spring bearing 43, appended drawing reference 45 be from the coil rack of each coil 41 of the collateral support of central part,
Appended drawing reference 46 is to expose to external power supply terminal, and appended drawing reference 47 is to link and support former and later two coil racks 45,45
Connection supporting member.
Therefore, according to the feed screw apparatus A of above structure, unquestionably nut member 70 can be made by the torque of motor 40
It moves in the axial direction, because being applicable in above-mentioned connected structure 1, the eccentric of magnet 10 (rotor) is reduced, low vibration and low noise
Sound, and impact resistance and excellent durability.
In addition, be fixed as one for feed screw apparatus A, such as by amasthenic lens and nut member 70, it can be effective
Make the autofocus mechanism of digital camera or video camera etc..
In addition, according to above embodiment, although the hole with flat face 11a and circular arc face 11b is inserted as axis
Through-hole 11, but other examples as axis insertion hole, are also possible to quadrangle or hexagon cross-section is the hole of polygon.This
When, make each flat surface portion in the hole of section polygon and the periphery brought into linear contact of axis 20.
More than, embodiment of the present invention is described in detail, but specific structure is not limited by these embodiments, is not taken off
The change etc. of design from present inventive concept range is also included in the present invention.In addition, for above-mentioned each embodiment, as long as
Its purpose and structure etc. are without special contradiction or problem, it will be able to technology be made mutually to divert, combine.
Claims (5)
1. the connected structure of a kind of axis and magnet, the axis including magnet and the insert magnet, which is characterized in that
On the component of a side in the axis and the magnet, it has been provided spaced apart multiple pressure contact portions in the circumferential, it is described
Pressure contact portion to radially projecting and crimped with the component of another party in the axis and the magnet,
In the circumferential between two adjacent pressure contact portions, it is ensured that have separate section, the separate section is for making the axis
Outer peripheral surface separated radially with the inner peripheral surface of the magnet, and in the separate section be filled with bonding agent.
2. the connected structure of axis according to claim 1 and magnet, which is characterized in that
The separate section makes its radial dimension with circumferentially gradually becoming smaller close to the pressure contact portion.
3. the connected structure of axis according to claim 1 or 2 and magnet, which is characterized in that
The outer peripheral surface of the axis is cylindrical shape,
In the inner peripheral surface of the magnet, it has been provided spaced apart multiple flat faces in the circumferential,
Each pressure contact portion is the line contact portion of each flat face and the outer peripheral surface of the axis.
4. a kind of motor, which is characterized in that
The connected structure for having axis described in any one of claims 1 to 3 and magnet.
5. a kind of feed screw apparatus, which is characterized in that
Has motor as claimed in claim 4.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017130932A JP2019017140A (en) | 2017-07-04 | 2017-07-04 | Junction structure for shaft and magnet, motor and lead screw device |
| JP2017-130932 | 2017-07-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208337386U true CN208337386U (en) | 2019-01-04 |
Family
ID=64775027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820788314.6U Expired - Fee Related CN208337386U (en) | 2017-07-04 | 2018-05-24 | The connected structure of axis and magnet, motor and feed screw apparatus |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2019017140A (en) |
| CN (1) | CN208337386U (en) |
-
2017
- 2017-07-04 JP JP2017130932A patent/JP2019017140A/en active Pending
-
2018
- 2018-05-24 CN CN201820788314.6U patent/CN208337386U/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2019017140A (en) | 2019-01-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190104 |