CN211701704U - Motor with a stator having a stator core - Google Patents
Motor with a stator having a stator core Download PDFInfo
- Publication number
- CN211701704U CN211701704U CN201921723652.2U CN201921723652U CN211701704U CN 211701704 U CN211701704 U CN 211701704U CN 201921723652 U CN201921723652 U CN 201921723652U CN 211701704 U CN211701704 U CN 211701704U
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- motor
- circuit board
- bus bar
- wall portion
- stator
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Abstract
Providing a motor having: a rotor (12) fixed to a shaft that is rotatable about a central axis; a stator (10) disposed radially outside the rotor; a housing (20) that holds the stator; a circuit board (30) disposed on one axial side of the stator; and a plate (60) which is arranged on one side of the circuit board in the axial direction, wherein a wall portion (61) extending in the axial direction is provided on the plate, a connecting portion (41) for connecting a coil wire drawn out from the stator is arranged on the outer side of the wall portion in the radial direction, and the connecting portion is composed of a bus bar terminal.
Description
The application is a divisional application of a utility model patent application with the application number of 201920207276.5, the application date of 2019, 2 and 18 months and the name of a utility model of a motor.
Technical Field
The utility model relates to a motor.
Background
The following motors are known: a circuit board on which a control circuit for controlling the rotation of the motor is mounted is disposed in the motor. A plurality of leads connected with the circuit board penetrate and wind in the motor and are led out to the outside of the shell.
Further, the following motors are known: a bus bar that electrically connects the coil wire of the stator and an external power supply is disposed in the motor. Normally, the bus bar is held by a bus bar holder made of resin (for example, japanese laid-open patent publication No. 2007-267525).
In a space in the motor through which a plurality of lead wires connected to the circuit board are passed, there are also bus bars, coil wires connected to the bus bars, and the like.
Therefore, when the lead wire is led out to the outside of the case while being passed through the motor, the lead wire may interfere with the bus bar or the like.
The lead can be protected by a tube or the like so that the lead is not damaged when interference occurs, but the occurrence of interference itself cannot be avoided.
SUMMERY OF THE UTILITY MODEL
The present invention provides a motor which can prevent interference between a plurality of lead wires connected to a circuit board and a bus bar.
An exemplary first invention motor of the present application includes: a rotor fixed to a shaft rotatable about a central axis; a stator disposed radially outward of the rotor; a housing that holds the stator; a circuit board disposed on one side of the stator in an axial direction; and a plate disposed on one side in an axial direction with respect to the circuit board, the plate being provided with a wall portion extending in the axial direction, and a connection portion to which a coil wire drawn out from the stator is connected being disposed radially outward with respect to the wall portion, the connection portion being constituted by a bus bar terminal.
According to the first exemplary embodiment of the present application, a motor that prevents interference between a plurality of leads connected to a circuit board and a bus bar or the like can be provided.
The above and other features, elements, steps, features and advantages of the present invention will become more apparent from the following detailed description of preferred embodiments of the present invention when taken in conjunction with the accompanying drawings.
Drawings
Fig. 1 is a sectional view schematically showing the structure of a motor according to an embodiment of the present invention.
Fig. 2 is a bottom view of the bearing holder of the present embodiment as viewed from the lower side in the axial direction.
Fig. 3 is a partial sectional view schematically showing the structure of a motor according to another embodiment of the present invention.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The present invention is not limited to the following embodiments. In addition, appropriate modifications can be made without departing from the scope of the effects of the present invention.
In the present specification, a direction parallel to the central axis of the motor is referred to as an "axial direction", a radial direction about the central axis is referred to as a "radial direction", and a circumferential direction about the central axis is referred to as a "circumferential direction". The upper side of the drawing is simply referred to as "upper side" and the lower side is simply referred to as "lower side" with the axial direction as the vertical direction. However, the vertical direction does not indicate the positional relationship and direction when the motor of the present embodiment is actually assembled to the machine.
Fig. 1 is a sectional view schematically showing the structure of a motor according to an embodiment of the present invention.
As shown in fig. 1, a motor 1 of the present embodiment includes: a rotor 12 fixed to a shaft 14 that rotates about a central axis J; and a stator 10 disposed radially outside the rotor 12. The stator 10 has a plurality of coils 11 arranged in the circumferential direction and is held by the housing 20. A plurality of magnets 13 are provided on the outer peripheral surface of the rotor 12. The shaft 14 is rotatably supported by a bearing 70 disposed axially upward and downward.
In the present embodiment, the circuit board 30 is disposed on the upper side (one side) in the axial direction of the stator 10. A sensor (not shown) for detecting the rotation angle and rotation speed of the rotor 12 is mounted on the circuit board 30. A control circuit (not shown) for controlling the rotation of the motor based on a detection signal of the sensor is mounted on the circuit board 30.
Further, a bearing holder 50 for holding the bearing 70 is disposed at an upper side (one side) in the axial direction with respect to the circuit board 30. In the present embodiment, the bearing holder 50 is attached to the housing 20 so as to close the opening of the housing 20.
A bus bar holder 40 that holds a bus bar (not shown) connected to a coil wire drawn out from the stator 10 is disposed on the lower side (the other side) in the axial direction with respect to the circuit board 30. For example, in the case of a three-phase synchronous motor, each bus bar is connected to a coil line corresponding to each phase or neutral point, or to coil lines of both phases. Further, a bus bar terminal 41 extending upward (one side) in the axial direction is provided on the peripheral edge portion of the bus bar holder 40. Here, the peripheral edge portion of the bus bar holder 40 is referred to as a portion on the housing 20 side in the radial direction, and in fig. 1, the bus bar terminal 41 is provided on the upper surface of the bus bar holder 40 on the housing 20 side.
Fig. 2 is a bottom view of the bearing holder 50 as viewed from the lower side (the other side) in the axial direction. In addition, the circuit board 30 and the bus bar holder 40 are shown by phantom lines.
As shown in fig. 2, a plurality of leads 90 connected to the circuit board 30 are passed through the gap 80 between the circuit board 30 and the bearing holder 50 shown in fig. 1, and led out to the outside of the housing 20. Here, the plurality of leads 90 are connected to a terminal block 91 attached to the outer periphery of the case 20. Further, the bus bar terminal 41 extending in the axial direction from the peripheral edge portion of the bus bar holder 40 is also connected to a terminal block 42 provided on the outer peripheral portion of the housing 20. Here, three bus bar terminals 41 corresponding to respective phases of the three-phase synchronous motor are exemplified.
As shown in fig. 1 and 2, the bearing holder 50 is provided with a wall 51 extending in the axial direction toward the circuit board 30. As shown in fig. 2, the plurality of leads 90 drawn from the circuit board 30 are routed at least through the wall 51 radially inward of the wall 51 and led out of the housing 20.
In the present embodiment, as shown in fig. 1, although the bus bar terminal 41 is positioned in the gap 80 between the circuit board 30 and the bearing holder 50, the wall portion 51 is provided radially inward of the bus bar terminal 41, and the plurality of lead wires 90 are wound radially inward of the wall portion 51, so that the plurality of lead wires 90 can be prevented from interfering with the bus bar terminal 41. In other words, in the gap 80 between the circuit board 30 and the bearing holder 50, even if the lead wire 90 partially overlaps the bus bar terminal 41 in the radial direction, by providing the wall portion 51 on the radially inner side of the bus bar terminal 41, the lead wire 90 can be prevented from interfering with the bus bar terminal 41. Further, since the plurality of leads 90 are surrounded by the wall portion 51, the circuit board 30, and the bearing holder 50, they do not protrude at least radially outward of the wall portion 51.
In the present embodiment, as shown in fig. 1, there may be a gap between the wall 51 and the circuit board 30, but the distance of the gap is preferably smaller than the diameter of the lead 90. By making the distance of the gap smaller than the diameter of the lead 90, the lead 90 can be prevented from coming out to the outside in the radial direction from the gap between the wall 51 and the circuit board 30, and therefore the lead 90 can be more reliably prevented from interfering with the bus bar terminal 41. Further, an axial end of the wall 51 may be connected to the circuit board 30. Since the axial end of the wall 51 is connected to the circuit board 30, the gap between the wall 51 and the circuit board 30 is eliminated, and thus the lead 90 and the bus bar terminal 41 can be more reliably prevented from interfering with each other. The wall 51 and the circuit board 30 can be connected to each other by, for example, bolts.
In the present embodiment, the wall 51 preferably overlaps the circuit board 30 in the axial direction. By overlapping the wall portion 51 and the circuit board 30 in the axial direction, the lead 90 can be surrounded by the wall portion 51, the circuit board 30, and the bearing holder 50 at least on the radially inner side of the wall portion 51, and therefore interference between the lead 90 and the bus bar terminal 41 can be more reliably prevented.
In the present embodiment, as shown in fig. 1, the bearing holder 50 includes a holding portion 52 that holds the bearing 70. The holding portion 52 extends in the axial direction toward the circuit board 30 like the wall portion 51, and thus functions as a second wall portion. By causing the holding portion 52 to function as the second wall portion and passing the plurality of leads 90 between the wall portion 51 and the holding portion 52, it is possible to more reliably prevent the leads 90 from interfering with the bus bar terminals 41.
Fig. 3 is a partial sectional view schematically showing the structure of a motor according to another embodiment of the present invention. Here, the structure other than the bearing holder 50 is the same as that shown in fig. 1.
As shown in fig. 3, in the present embodiment, a plate 60 is disposed at an upper side (one side) in the axial direction with respect to the circuit board 30. Here, the board 60 is arranged to partially overlap with the circuit board 30 in the axial direction.
In the present embodiment, as shown in fig. 1, instead of providing the wall portion 51 on the bearing holder 50, a first wall portion 61 and a second wall portion 62 extending in the axial direction toward the circuit board 30 are provided on the plate 60. Here, the first wall portion 61 and the second wall portion 62 are arranged to partially overlap in the radial direction.
In the present embodiment, a plurality of leads 90 drawn from the circuit board 30 are led out to the outside of the case 20 while being wound between the first wall portion 61 and the second wall portion 62. Since the plurality of leads 90 are inserted and wound between the first wall portion 61 and the second wall portion 62, the leads 90 can be surrounded by the first wall portion 61, the second wall portion 62, the circuit board 30, and the board 60, and therefore the leads 90 can be prevented from interfering with the bus bar terminals 41.
In the present embodiment, the plate 60 is provided with the two wall portions 61 and 62, but it is needless to say that there may be one wall portion. In this case, the lead wire 90 is wound at a position radially inward of the wall portion.
In the present embodiment, the wall portion may be located at a position overlapping the circuit board 30 in the axial direction. Therefore, when the plurality of leads 90 are led out to the outside of the case 20 while being wound around the gap between the circuit board 30 and the bus bar holder 40, a wall portion extending in the axial direction toward the circuit board 30 may be provided on the bus bar holder 40.
In the present embodiment, the bus bar terminal 41 has been described as an example of the object of interfering with the plurality of lead wires 90 drawn out from the circuit board 30, but the same effects can be exerted on the electrical connection portion disposed in the motor and the lead wire such as the coil wire, in addition to the bus bar terminal 41. That is, in the case where the lead 90 partially overlaps the electrical connection portion or the like in the radial direction in the gap through which the lead 90 is passed (for example, the gap 80 between the circuit board 30 and the bearing holder 50), the wall portion of the present embodiment is provided, whereby the lead 90 can be prevented from interfering with the electrical connection portion or the like.
While the present invention has been described above with reference to the preferred embodiments, it is to be understood that the description is not limited thereto, and various changes may be made. For example, in the above-described embodiment, as shown in fig. 1, an inner rotor type motor is exemplified, but an outer rotor type motor can be applied to the present invention.
Claims (13)
1. A motor, comprising:
a rotor fixed to a shaft rotatable about a central axis;
a stator disposed radially outward of the rotor;
a housing that holds the stator;
a circuit board disposed on one side of the stator in an axial direction; and
a plate disposed on one axial side of the circuit board,
a wall portion extending in the axial direction is provided on the plate,
a connecting portion to which a coil wire drawn out from the stator is connected is arranged radially outward of the wall portion,
the connecting portion is constituted by a bus bar terminal.
2. The motor of claim 1,
a bus bar holder that holds a bus bar connected to a coil wire drawn out from the stator is provided on the other side in the axial direction with respect to the circuit board,
the bus bar holder has a peripheral edge portion provided with a bus bar terminal extending to one side in the axial direction.
3. The motor of claim 1,
the bus bar terminal is connected to a terminal block provided at an outer peripheral portion of the housing.
4. The motor of claim 2,
the peripheral edge portion of the bus bar holder is a portion on the side of the housing in the radial direction,
the bus bar terminal is provided on an upper surface of the bus bar holder on the side of the case.
5. The motor of claim 2,
the motor has a wall portion extending in an axial direction from the bus bar holder toward the circuit board.
6. The motor according to any one of claims 1 to 5,
the lead wire connected with the circuit board is wound around the gap between the circuit board and the board and led out to the outer side of the shell,
the lead wire is wound around at least the wall portion at a position radially inward of the wall portion.
7. The motor of claim 6,
in the gap between the circuit board and the board, the lead partially overlaps the connection portion in the radial direction.
8. The motor of claim 6,
the distance of the gap between the wall portion and the circuit board is smaller than the diameter of the lead.
9. The motor of claim 6,
the motor has a bearing that supports the shaft to enable the shaft to rotate,
the plate is formed of a bearing holder that holds the bearing.
10. The motor of claim 9,
the bearing holder has a holding portion for holding the bearing,
the lead wire is passed between the wall portion and the holding portion.
11. The motor of claim 1,
the wall portion overlaps with the circuit board in the axial direction.
12. The motor of claim 1,
the axial end of the wall portion is connected to the circuit board.
13. The motor of claim 1,
the wall portion is connected to the circuit board by a bolt.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018026897A JP7059678B2 (en) | 2018-02-19 | 2018-02-19 | motor |
| JP2018-026897 | 2018-12-10 | ||
| CN201920207276.5U CN209608462U (en) | 2018-02-19 | 2019-02-18 | Motor |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920207276.5U Division CN209608462U (en) | 2018-02-19 | 2019-02-18 | Motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211701704U true CN211701704U (en) | 2020-10-16 |
Family
ID=67773285
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921723652.2U Active CN211701704U (en) | 2018-02-19 | 2019-02-18 | Motor with a stator having a stator core |
| CN201920207276.5U Active CN209608462U (en) | 2018-02-19 | 2019-02-18 | Motor |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920207276.5U Active CN209608462U (en) | 2018-02-19 | 2019-02-18 | Motor |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP7059678B2 (en) |
| CN (2) | CN211701704U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023103223A1 (en) * | 2021-12-09 | 2023-06-15 | 安徽威灵汽车部件有限公司 | Motor, electric power steering system and vehicle |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001268843A (en) * | 2000-03-17 | 2001-09-28 | Fujitsu General Ltd | Motor |
| JP6009856B2 (en) * | 2012-08-03 | 2016-10-19 | 日本電産サーボ株式会社 | Rotating electric machine |
| JP6469550B2 (en) * | 2015-08-27 | 2019-02-13 | ミネベアミツミ株式会社 | Motor and blower |
-
2018
- 2018-02-19 JP JP2018026897A patent/JP7059678B2/en active Active
-
2019
- 2019-02-18 CN CN201921723652.2U patent/CN211701704U/en active Active
- 2019-02-18 CN CN201920207276.5U patent/CN209608462U/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN209608462U (en) | 2019-11-08 |
| JP2019146322A (en) | 2019-08-29 |
| JP7059678B2 (en) | 2022-04-26 |
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