CN112104185A - Stepping motor and wiring substrate for motor - Google Patents
Stepping motor and wiring substrate for motor Download PDFInfo
- Publication number
- CN112104185A CN112104185A CN202010543173.3A CN202010543173A CN112104185A CN 112104185 A CN112104185 A CN 112104185A CN 202010543173 A CN202010543173 A CN 202010543173A CN 112104185 A CN112104185 A CN 112104185A
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- China
- Prior art keywords
- connector
- connection
- wiring board
- winding
- end portion
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K37/00—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors
- H02K37/02—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of variable reluctance type
- H02K37/04—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of variable reluctance type with rotors situated within the stators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
- H02K5/225—Terminal boxes or connection arrangements
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Motor Or Generator Frames (AREA)
Abstract
Provided are a stepping motor and a motor wiring board, which can be more miniaturized than the conventional one, and reduce the risk of short circuit of a wiring pattern. The method comprises the following steps: a rotor (22); a stator (24), wherein the stator (24) is arranged around the rotor (22) and has a plurality of windings (28); a connector unit (32), wherein the connector unit (32) is used for connecting with the outside; and a wiring board (36), wherein the wiring board (36) is provided with a wiring pattern for electrically connecting each winding (28) and the connector part (32), and the wiring board (36) is formed to be arranged only on the upper part of the connector part (32) and not on the upper part of each winding (28).
Description
Technical Field
The present invention relates to a stepping motor and a motor wiring board used in various industrial apparatuses such as Office Automation (Office Automation) apparatuses, medical apparatuses, semiconductor manufacturing apparatuses, error Analysis (Failure Analysis) apparatuses, and robots.
Background
Now, a stepping motor is employed in the above-described various apparatuses, and the following proposals are made.
In the stepping motor disclosed in patent document 1 (japanese patent application laid-open No. 8-28959), a plurality of terminals for connectors and terminals for wiring are integrally molded with a synthetic resin, an engaging portion for engaging with the integrally molded terminals is provided in a motor wire insulation insulator, and the stepping motor includes a motor cover which holds and fixes the integrally molded terminals together with the motor wire insulation insulator.
According to the stepping motor having such a configuration, the protruding length of the connector fitting portion can be shortened by effectively utilizing a clearance space required for assembly, and the soldering joining of the conventional printed circuit board and the connector terminal can be omitted.
In addition, in the stepping motor disclosed in patent document 2 (japanese patent No. 6054754), the connector housing is integrally formed with the insulator, and the wiring board includes: a terminal pin disposed in a protruding manner in the connector housing; a terminal part connected with the winding; and a wiring board connecting the terminal pins and the terminal portions.
According to the stepping motor of patent document 2, the dimensional accuracy of the connector housing can be improved, and disconnection of the wiring near the connector housing can be avoided, thereby simplifying the assembly process.
Documents of the prior art
Patent document
Patent document 1: japanese patent publication No. 8-28959
Patent document 2: japanese patent No. 6054754
Disclosure of Invention
According to the stepping motor of patent document 1, plating is required after molding, and in addition, in order to mold simultaneously with the insulator, the processing accuracy needs to be improved, so that the processing cost is increased.
In recent years, stepping motors have been used in various apparatuses more than ever, and demands for further miniaturization have been increasing.
In this regard, according to the stepping motor of patent document 2, the wiring board and the terminal are present above the winding, and the insulation distance must be secured because there is a welding portion between the winding and the wiring board, and the length of the motor in the axial direction becomes long.
Further, in the wiring board of the conventional stepping motor, the wiring pattern extends from the connector portion to the position of the lead wire of the winding, and there is a problem that a short circuit of the wiring pattern on the wiring board may occur.
Accordingly, the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a stepping motor and a wiring board for a motor, which can be more miniaturized than the conventional ones, and which can reduce the risk of short-circuiting of a wiring pattern.
The stepping motor according to the present invention includes: a rotor; a stator disposed around the rotor and having a plurality of windings; a connector section for connecting to the outside; and a wiring board on which a wiring pattern for electrically connecting each of the wires to the connector portion is formed, wherein the wiring board is not arranged on the wires but only on the connector portion.
With the above configuration, since the wiring board is not disposed above the winding, the wiring board can be miniaturized to a corresponding degree regardless of the insulation distance between the winding and the wiring board. In addition, since the distance of the wiring pattern can be shortened, the risk of short circuit in the wiring pattern can be reduced.
In the wiring board, a plurality of connector connection portions to which a plurality of connection pins of the connector portion are connected and a plurality of wire connection portions to which ends of the wires are connected may be formed on a straight line along an arrangement direction of the connection pins.
According to the above configuration, the size of the wiring board in the direction orthogonal to the direction in which the connection pins of the connector portion are arranged (i.e., the radial direction of the motor) can be reduced as much as possible.
In the connector portion, four connection pins connected to a wiring board may be arranged in this order, and four winding end portions of a first winding end portion, a second winding end portion, a third winding end portion, and a fourth winding end portion corresponding to the respective connection pins may extend toward the wiring board, and the wiring board may be characterized in that, in a plan view, the second winding connection portion to which the second winding end portion is connected, the first winding connection portion to which the first winding end portion is connected, the first connector connection portion to which the first connection pin of the connector portion is connected, the second connector connection portion to which the second connection pin of the connector portion is connected, the third connector connection portion to which the third connection pin of the connector portion is connected, and the fourth connector connection portion to which the fourth connection pin of the connector portion is connected are connected, from the left side, the wiring board may be arranged in this order, And a fourth winding connecting part for connecting the fourth winding end part and a third winding connecting part for connecting the third winding end part are formed on a straight line along the arrangement direction of the connecting pins.
According to the above configuration, the connector connection portions and the wire winding connection portions can be arranged on a straight line along the arrangement direction of the connection pins.
The wiring board for a motor according to the present invention is characterized in that the wiring board for a motor is formed in a size that electrically connects a plurality of windings in a motor with a plurality of connection pins that connect the motor to an external connector portion, and is disposed only on an upper portion of the connector portion without being disposed on an upper portion of each of the windings
With the above configuration, the wiring board is not disposed above the winding for the motor incorporating the wiring board, and therefore, the insulation distance between the winding and the wiring board is not taken into consideration, and the motor can be downsized to a corresponding extent. In addition, since the distance of the wiring pattern can be shortened, the risk of short circuit in the wiring pattern can be reduced.
According to the stepping motor and the wiring board for the motor of the present invention, the motor can be miniaturized, and the distance of the wiring pattern can be shortened, so that the risk of short circuit in the wiring pattern can be reduced.
Drawings
Fig. 1 is a side view of a stepping motor according to the present embodiment.
Fig. 2 is a plan view of a conventional wiring board as a comparative example.
Fig. 3 is a plan view of the wiring board of the present embodiment.
Fig. 4 is a side view of a stepping motor provided with a conventional wiring board as a comparative example.
Fig. 5 is a side view for explaining miniaturization of the stepping motor in comparison with fig. 4.
Detailed Description
Fig. 1 shows the overall structure of the stepping motor.
The stepping motor 20 includes a rotating shaft 21, and a rotor 22 is provided on the rotating shaft 21. The rotary shaft 21 is rotatably mounted by a bearing 33.
In the present embodiment, the right direction in fig. 1 is defined as an upper portion (upper portion), that is, the protruding side of the rotary shaft 21 is defined as a lower portion, and the opposite side is defined as an upper portion.
A stator 24 is disposed around the rotor 22.
The stator 24 is composed of a stator core 26 and an insulator 30, the stator core 26 is composed of laminated electromagnetic steel sheets, and the insulator 30 is wound with a coil 28, is formed of an insulating material, and is insulated from the stator core 26.
A bracket 31 is provided so as to cover the wire 28 and the insulator 30. The bracket 31 constitutes an exterior of the stepping motor 20.
The stepping motor 20 of the present embodiment is a two-phase bipolar type, and the number of ends of the winding 28 is four. Although only two are shown in fig. 1, actually, another winding end portion exists on the vertical depth side of the drawing.
A connector portion 32 for connecting the four ends of the wire 28 to the outside is provided.
The connector portion 32 has four connecting pins 35. In fig. 1, since four connecting pins are arranged toward the depth side in the vertical direction of the drawing, one connecting pin 35 appears in fig. 1.
The four connection pins 35 and the four terminals of the winding 28 are electrically connected to a wiring board 36. As the wiring board 36, a general printed board on which a wiring pattern such as a copper foil can be formed on a surface thereof can be used.
Here, fig. 2 is a plan view of a conventional wiring board for comparison with the wiring board of the present embodiment.
The conventional wiring board 1 is formed in a semicircular shape so as to be disposed around the rotor 22, and is disposed above the winding 28.
In the conventional wiring board 1, a first connector connection portion 2a for connecting to a first connection pin of four connection pins of the connector portion 32, a second connector connection portion 2b for connecting to a second connection pin of the connector portion 32, a third connector connection portion 2c for connecting to a 3 rd connection pin of the connector portion 32, and a fourth connector connection portion 2d for connecting to a fourth connection pin of the connector portion 32 are formed in a semicircular central portion from the left side in the drawing.
Each of the connecting portions 2a to 2d is composed of an electronic component insertion through hole into which the connecting pin 35 is inserted and a soldering land.
Further, a first wire connection portion 3a to which a first wire end portion is connected and a second wire connection portion 3b to which a second wire end portion is connected are formed at a left side portion in a plan view of a semicircular portion of the conventional wiring board 1, and a third wire connection portion 3c to which a third wire end portion is connected and a fourth wire connection portion 3d to which a fourth wire end portion is connected are formed at a right side portion in a plan view of the semicircular portion.
These connecting portions 3a to 3d are formed as pads for bonding the ends of the winding 28.
In the conventional wiring board 1, the first to 4 th wire connection portions 3a to 3d are arranged in this order from left to right in fig. 2 in a plan view.
The first to 4 th connector links 2a to 2d are arranged in this order from left to right in fig. 2 in a plan view.
In the conventional wiring board 1, the first wiring pattern 4a for electrically connecting the first wire connection portion 3a and the first connector connection portion 2a and the second wiring pattern 4b for electrically connecting the second wire connection portion 3b and the second connector connection portion 2b are formed in an arc shape along a semicircle on the left side of the semicircle, and the third wiring pattern 4c for electrically connecting the third wire connection portion 3c and the third connector connection portion 2c and the fourth wiring pattern 4d for electrically connecting the fourth wire connection portion 3d and the fourth connector connection portion 2d are formed in an arc shape along a semicircle on the right side of the semicircle.
In contrast, fig. 3 is a plan view of the wiring board 36 of the present embodiment.
The wiring board 36 of the present embodiment is substantially rectangular in plan view. The portion not forming the semicircle is not disposed above the winding 28. The wiring board 36 is disposed on the upper surface of the connector portion 32 and has a size not protruding radially inward from the connector portion 32.
In the wiring board 36 of the present embodiment, the connection portions of the winding end portion of the winding wire 28 and the connection portions of the connection pins of the connector portion 32 are formed on a straight line in the left-right direction of the drawing (i.e., the arrangement direction of the connection pins 35 of the connector portion 32). Therefore, the length of the side facing the radial direction of the wiring board 36 can be shortened.
The arrangement of the respective connection portions of the wiring board 36 of the present embodiment is as follows.
From the left side in plan view (the left side in fig. 3), the second wire connection portion 40b to which the second wire end portion is connected, the first wire connection portion 40a to which the first wire end portion is connected, the first connector connection portion 42a to which the first connection pin 35a of the connector portion 32 is connected, the second connector connection portion 42b to which the second connection pin 35b of the connector portion 32 is connected, the third connector connection portion 42c to which the third connection pin 35c of the connector portion 32 is connected, the fourth connector connection portion 42d to which the fourth connection pin 35d of the connector portion 32 is connected, the fourth wire connection portion 40d to which the fourth wire end portion is connected, and the third wire connection portion 40c to which the third wire end portion is connected are arranged in this order on a straight line.
As described above, the wiring board 36 of the present embodiment is configured such that the connection pin portion 32 is provided directly above the connection pin 35 with respect to the connector connection portions 42a to 42d of the connection pins 35, and the winding connection portions 40a to 40d of the winding end portions of the windings 28 are arranged on both the right and left sides of the connector connection portions 42a to 42 d.
In the wiring board 36 of the present embodiment, the first wiring pattern 44a electrically connecting the first wire connection portion 40a and the first connector connection portion 42a is formed to have a small distance in the left-right direction.
The second wiring pattern 44b, which electrically connects the second wire connection portion 40b and the second connector connection portion 42b, is arranged to pass around the first wire connection portion 40a and the first connector connection portion 42a on the outer side in the radial direction of the motor.
Similarly, the third wiring pattern 44c that electrically connects the third winding wire connection portion 40c and the first connector connection portion 42c bypasses the fourth connector connection portion 42d and the fourth winding wire connection portion 40d on the outer side in the radial direction of the motor.
The fourth wiring pattern 44d electrically connecting the fourth wire connection portion 40d and the fourth connector connection portion 42d is arranged at a small distance in the left-right direction.
As described above, in the wiring board 36 of the present embodiment, the distance of each wiring pattern 44 electrically connecting each wire connection portion 40a to 40d and each connector connection portion 42a to 42d can be made very short compared to the conventional one.
Therefore, the risk of short-circuiting the wiring pattern can be reduced.
In addition, fig. 4 is a side view of a conventional wiring board for comparison with the present embodiment.
As shown in fig. 4, the conventional wiring board 1 is disposed above the connector portion 32 and above the wire 28. Since the connection between the winding end of the winding wire 28 and the wiring board 1 is performed by soldering, it is necessary to secure a certain insulation distance. Here, x represents the distance from the upper surface of the conventional stator core to the upper surface of the bracket.
Fig. 5 shows a side view of the present exemplary embodiment for comparison with fig. 4. In the present embodiment, since wiring board 36 is not disposed above coil 28, it is not necessary to secure an insulation distance as in the conventional case, and the distance from the upper surface of stator core 26 to the upper surface of bracket 31 can be shortened as shown in fig. 1. Specifically, the distance x from the upper surface of the stator core to the upper surface of the bracket can be set to 0.8x in the present embodiment. In this way, in the present embodiment, the size of the stepping motor 20 is successfully reduced.
While various preferred embodiments of the present invention have been described above, it is needless to say that the present invention is not limited to the above embodiments, and many changes can be made within a range not departing from the spirit of the present invention.
Claims (6)
1. A stepper motor, comprising:
a rotor;
a stator disposed around the rotor and having a plurality of windings;
a connector portion for connection with an outside; and
a wiring board on which a wiring pattern for electrically connecting each of the wires to the connector portion is formed,
the wiring board is formed to have a size that is not disposed above each of the wires but is disposed only above the connector portion.
2. The stepping motor according to claim 1,
in the wiring board, a plurality of connector connection portions to which a plurality of connection pins of the connector portion are connected and a plurality of wire connection portions to which end portions of the wires are connected are formed on a straight line along an arrangement direction of the connection pins.
3. The stepping motor according to claim 2,
four connection pins connected to the wiring board are arranged in the connector portion in the order of a first connection pin, a second connection pin, a third connection pin, and a fourth connection pin,
four of a first winding end portion, a second winding end portion, a third winding end portion, and a fourth winding end portion corresponding to each of the connecting pins extend toward the wiring substrate,
in the wiring board, in a plan view, a second winding wire connection portion to which a second winding wire end portion is connected, a first winding wire connection portion to which a first winding wire end portion is connected, a first connector connection portion to which a first connection pin of the connector portion is connected, a second connector connection portion to which a second connection pin of the connector portion is connected, a third connector connection portion to which a third connection pin of the connector portion is connected, a fourth connector connection portion to which a fourth connection pin of the connector portion is connected, a fourth winding wire connection portion to which a fourth winding wire end portion is connected, and a third winding wire connection portion to which a third winding wire end portion is connected are formed on a straight line along an arrangement direction of the connection pins.
4. A wiring board for a motor, characterized in that,
the wiring board for motor is used for electrically connecting a plurality of windings in the motor with a plurality of connecting pins for connecting the motor with an external connector,
and is formed in a size that is disposed only on the upper portion of the connector portion and is not disposed on the upper portion of each of the windings.
5. The wiring board for motor according to claim 4, wherein,
a plurality of connector connection portions to which the plurality of connection pins of the connector portion are connected and a plurality of wire connection portions to which end portions of the wires are connected are formed on a straight line along an arrangement direction of the connection pins.
6. The wiring board for motor according to claim 5, wherein,
four connection pins connected to the wiring board are arranged in the connector portion in the order of a first connection pin, a second connection pin, a third connection pin, and a fourth connection pin,
four of a first winding end portion, a second winding end portion, a third winding end portion, and a fourth winding end portion corresponding to each of the connecting pins can be connected,
in a plan view, from the left side, a second winding wire connecting portion to which a second winding wire end portion is connected, a first winding wire connecting portion to which a first winding wire end portion is connected, a first connector connecting portion to which a first connecting pin of the connector portion is connected, a second connector connecting portion to which a second connecting pin of the connector portion is connected, a third connector connecting portion to which a third connecting pin of the connector portion is connected, a fourth connector connecting portion to which a fourth connecting pin of the connector portion is connected, a fourth winding wire connecting portion to which a fourth winding wire end portion is connected, and a third winding wire connecting portion to which a third winding wire end portion is connected are formed on a straight line along the arrangement direction of the connecting pins.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019112490A JP6916838B2 (en) | 2019-06-18 | 2019-06-18 | Stepping motor and wiring board for motor |
| JP2019-112490 | 2019-06-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112104185A true CN112104185A (en) | 2020-12-18 |
| CN112104185B CN112104185B (en) | 2023-10-03 |
Family
ID=73749695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010543173.3A Active CN112104185B (en) | 2019-06-18 | 2020-06-15 | Stepping motor and wiring board for motor |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP6916838B2 (en) |
| CN (1) | CN112104185B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0414476U (en) * | 1990-05-29 | 1992-02-05 | ||
| JPH0591167U (en) * | 1992-05-12 | 1993-12-10 | 株式会社三協精機製作所 | Rotating electric machine connection device |
| JP2010288361A (en) * | 2009-06-11 | 2010-12-24 | Nidec Sankyo Corp | Motor |
| JP2014138453A (en) * | 2013-01-15 | 2014-07-28 | Minebea Co Ltd | Stepping motor |
| CN104467350A (en) * | 2013-09-24 | 2015-03-25 | 山洋电气株式会社 | Linear motor |
| CN104578512A (en) * | 2013-10-23 | 2015-04-29 | 日本电产三协株式会社 | Motor |
| CN205017139U (en) * | 2014-10-02 | 2016-02-03 | 日本电产伺服有限公司 | Motor |
| CN106797153A (en) * | 2014-09-30 | 2017-05-31 | 日本电产株式会社 | Motor |
| JP2017158254A (en) * | 2016-02-29 | 2017-09-07 | ミネベアミツミ株式会社 | Hybrid stepping motor |
| CN107408867A (en) * | 2015-03-05 | 2017-11-28 | 美蓓亚三美株式会社 | Hybrid stepper motor |
| CN108808898A (en) * | 2017-04-28 | 2018-11-13 | 美蓓亚三美株式会社 | Stator and rotary transformer |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5567656U (en) * | 1978-10-30 | 1980-05-09 | ||
| JP2581179Y2 (en) * | 1992-08-07 | 1998-09-21 | 三洋電機株式会社 | motor |
-
2019
- 2019-06-18 JP JP2019112490A patent/JP6916838B2/en active Active
-
2020
- 2020-06-15 CN CN202010543173.3A patent/CN112104185B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0414476U (en) * | 1990-05-29 | 1992-02-05 | ||
| JPH0591167U (en) * | 1992-05-12 | 1993-12-10 | 株式会社三協精機製作所 | Rotating electric machine connection device |
| JP2010288361A (en) * | 2009-06-11 | 2010-12-24 | Nidec Sankyo Corp | Motor |
| JP2014138453A (en) * | 2013-01-15 | 2014-07-28 | Minebea Co Ltd | Stepping motor |
| CN104467350A (en) * | 2013-09-24 | 2015-03-25 | 山洋电气株式会社 | Linear motor |
| CN104578512A (en) * | 2013-10-23 | 2015-04-29 | 日本电产三协株式会社 | Motor |
| CN106797153A (en) * | 2014-09-30 | 2017-05-31 | 日本电产株式会社 | Motor |
| CN205017139U (en) * | 2014-10-02 | 2016-02-03 | 日本电产伺服有限公司 | Motor |
| CN107408867A (en) * | 2015-03-05 | 2017-11-28 | 美蓓亚三美株式会社 | Hybrid stepper motor |
| JP2017158254A (en) * | 2016-02-29 | 2017-09-07 | ミネベアミツミ株式会社 | Hybrid stepping motor |
| CN108808898A (en) * | 2017-04-28 | 2018-11-13 | 美蓓亚三美株式会社 | Stator and rotary transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112104185B (en) | 2023-10-03 |
| JP2020205700A (en) | 2020-12-24 |
| JP6916838B2 (en) | 2021-08-11 |
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