CN114679014A - Motor and assembling method - Google Patents
Motor and assembling method Download PDFInfo
- Publication number
- CN114679014A CN114679014A CN202210311393.2A CN202210311393A CN114679014A CN 114679014 A CN114679014 A CN 114679014A CN 202210311393 A CN202210311393 A CN 202210311393A CN 114679014 A CN114679014 A CN 114679014A
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- CN
- China
- Prior art keywords
- positioning
- end cover
- circuit board
- shell
- stator core
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/14—Casings; Enclosures; Supports
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
Abstract
The invention provides a motor and an assembly method thereof, wherein the motor comprises a shell, a stator core, an end cover, a circuit board and a Hall element arranged on the circuit board; the stator core and the circuit board are both positioned in the shell; the stator core is fixedly connected with the shell through a first positioning structure; the circuit board is fixedly connected with the end cover through a second positioning structure; the end cover is fixedly connected with the machine shell through a third positioning structure. The first positioning structure comprises a positioning key; and key grooves matched with the positioning keys in a positioning manner are formed in the inner side wall of the shell and the outer side wall of the stator core.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a motor and an assembly method.
Background
The Hall element is used in the motor for detecting the relative position of the motor rotor to the stator winding in the moving process and converting the position signal of the permanent magnet rotor magnetic field into an electric signal. The precision of the position of the Hall element determines the efficiency of the motor, in the prior art, one is to mount a circuit board welded with the Hall element on a stator winding and fix the circuit board by gluing, although the mounting method is simple and easy to operate, the reliability of the fixed structure is poor; the other method is to reserve a Hall element positioning structure on an insulating structure for installing the stator core, and then directly install a circuit board for welding the Hall element on the insulating structure, although the reliability is higher, the method is not suitable for a small-volume motor which has small stator core outer diameter and higher slot area utilization and can not design the Hall installation structure.
Disclosure of Invention
In order to solve the technical problem that the motor with small volume cannot be used, the invention provides the motor which is accurate in Hall element positioning, high in reliability and suitable for the motor with small volume and the assembling method.
According to an aspect of the present invention, an electric machine includes: the motor comprises a shell, a stator core, an end cover, a circuit board and a Hall element arranged on the circuit board;
the stator core and the circuit board are both positioned in the shell;
the stator core is fixedly connected with the shell through a first positioning structure;
the circuit board is fixedly connected with the end cover through a second positioning structure;
the end cover is fixedly connected with the machine shell through a third positioning structure.
According to at least one embodiment of the invention, the first positioning structure comprises a positioning key;
and key grooves matched with the positioning keys in a positioning manner are formed in the inner side wall of the shell and the outer side wall of the stator core.
According to at least one embodiment of the invention, the key slot of the housing opens at least to one end face of the housing.
According to at least one embodiment of the invention, the central axis of the positioning key coincides with the magnetomotive force axis of the stator core.
According to at least one embodiment of the present invention, the second positioning structure comprises a first positioning pin and a first positioning hole in positioning fit with the first positioning pin;
the end cover and the circuit board are both provided with the first positioning hole, and two ends of the first positioning pin are respectively inserted into the first positioning hole of the end cover and the first positioning hole of the circuit board; or, one of the end cover and the circuit board is provided with the first positioning hole, and the other is fixed with the first positioning pin inserted into the first positioning hole.
According to at least one embodiment of the invention, one end of the casing is matched with the shaft hole of the end cover, and the matching surface is a cylindrical surface;
the third positioning structure comprises a second positioning pin;
and a second positioning hole matched with the second positioning pin in a positioning way is formed in the inner side wall of one end of the shell and the outer side wall of the end cover.
A method of assembling an electric machine comprising:
mounting a Hall element on a circuit board;
positioning and connecting the circuit board and the end cover, and then positioning and connecting the end cover and the shell;
and positioning and connecting the shell and the stator core.
According to at least one embodiment of the invention, the positioning and connecting the housing and the stator core comprises:
key grooves are processed on the inner side wall of the shell and the outer side wall of the stator core;
and installing a positioning key at the key slot of the stator core, aligning the positioning key to the key slot of the shell, and inserting the stator core into the shell.
According to at least one embodiment of the invention, after the key grooves are processed on the inner side wall of the machine shell and the outer side wall of the stator core, the stator winding is wound by taking the key grooves of the stator core as a starting position, so that the phase sequence position of the motor is determined.
According to at least one embodiment of the present invention, the positioning and connecting the circuit board and the end cap, and then the positioning and connecting the end cap and the housing, comprises:
respectively processing a first positioning hole and a second positioning hole on the circuit board, the shell and the end cover;
inserting two ends of a first positioning pin into a first positioning hole of the end cover and a first positioning hole of the circuit board respectively, and fixing the circuit board to the end cover by using screws;
and inserting the end cover into the shell, respectively inserting the second positioning pin into the second positioning hole of the end cover and the second positioning hole of the shell, and fixing the end cover to the shell by using a screw.
The invention has the beneficial effects that: the circuit board of the Hall element is fixed on the end cover, so that the Hall element is more suitable for a small-volume motor which cannot be designed with an insulation structure due to the size problem; secondly, the relative position between the stator core and the shell is determined through the first positioning structure, the relative position between the circuit board provided with the Hall element and the end cover is determined through the second positioning structure, and the relative position between the end cover and the shell is determined through the third positioning structure, so that the relative position between the Hall element and the stator core is determined; the Hall element has high fixing reliability and more accurate position, so that the performance parameters of the motor are stable; and, the whole assembly process of motor easy operation.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the principles of the invention.
Fig. 1 is a schematic structural view of a motor according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of the phase sequence of the stator windings in the machine shown in fig. 1.
Fig. 3 is a schematic view of the position of the orientation key relative to the stator windings in the motor of fig. 1.
Fig. 4 is an exploded view of the assembly of the housing and stator core of the motor shown in fig. 1.
Fig. 5 is an exploded view of the assembly of the circuit board and end cap of the motor shown in fig. 1.
Fig. 6 is an exploded view of the assembly of the housing and end cap of the motor shown in fig. 1.
Reference numerals are as follows: 1-a rotor; 2-front end cover; 3-a machine shell; 4-a stator core; 5-a key slot; 6-end cover; 7-a circuit board; 8-a Hall element; 9-a positioning key; 10-a first locator pin; 11-a first locating hole; 12-a second locating pin; 13-second positioning hole.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
According to a first embodiment of the present invention, as shown in fig. 1 to 6, there is provided a motor including: the motor comprises a shell 3, a stator core 4, an end cover 6, a circuit board 7 and a Hall element 8 arranged on the circuit board 7; the stator core 4 and the circuit board 7 are both positioned in the shell 3; the stator core 4 is fixedly connected with the shell 3 through a first positioning structure; the circuit board 7 is fixedly connected with the end cover 6 through a second positioning structure; the end cover 6 is fixedly connected with the casing 3 through a third positioning structure.
The hall element 8 may be soldered to the circuit board 7 by a soldering fixture, which is well known in the art, to secure the position of the hall element 8 relative to the circuit board 7.
As shown in fig. 3, the motor further includes a front end cover 2 and a rotor 1, and the installation form of the front end cover 2, the rotor 1 and the housing 3 is conventional and does not belong to the improvement point of the present invention, and details are not described here.
The first positioning structure, the second positioning structure and the third positioning structure can adopt the existing positioning structures such as a seam allowance and a profile modeling. For example, the outer peripheral side wall of the stator core 4 and the inner peripheral side wall of the housing 3 may be made to be matched non-circular, while the outer peripheral side wall of the end cover 6 is also made to be matched non-circular, such as square, with the inner peripheral side wall of the housing 3; similarly, the circuit board 7 may be non-circular, such as rectangular, and the end cap 6 may be provided with a positioning groove adapted to the circuit board 7, so as to directly embed the circuit board 7 into the positioning groove.
In one embodiment, the housing 3, the stator core 4 and the end cap 6 are each cylindrical, and the first positioning structure includes a positioning key 9; key grooves 5 matched with the positioning keys 9 in a positioning way are formed in the inner side wall of the shell 3 and the outer side wall of the stator core 4; the stator core 4 may be interference-fitted with the housing 3.
For the convenience of installation, the key slot 5 of the casing 3 is at least communicated with one end face of the casing 3, namely, the positioning key 9 can be firstly placed in the key slot 5 of the stator core 4, then the positioning key 9 is aligned with the key slot 5 of the casing 3, and the stator core 4 is pressed into the casing 3.
In one embodiment, the central axis of the positioning key 9 coincides with the magnetomotive force axis of the stator core 4, so that the key slot 5 is used as the starting position defined by the motor slot for winding, and further the phase sequence position of the motor is determined.
In one embodiment, the second positioning structure comprises a first positioning pin 10 and a first positioning hole 11 in positioning fit with the first positioning pin 10; the end cover 6 and the circuit board 7 are both provided with a first positioning hole 11, and two ends of a first positioning pin 10 are respectively inserted into the first positioning hole 11 of the end cover 6 and the first positioning hole 11 of the circuit board 7; or, one of the end cover 6 and the circuit board 7 is provided with a first positioning hole 11, and the other is fixed with a first positioning pin 10 inserted into the first positioning hole 11. Specifically, in the present embodiment, the end cover 6 and the circuit board 7 are both provided with two first positioning holes 11, and correspondingly, two first positioning pins 10 are provided, and two ends of the two first positioning pins 10 are respectively inserted into the two first positioning holes 11 of the end cover 6 and the circuit board 7; the circuit board 7 may be fixed to the end cap 6 by screws. The first positioning hole 11 and the first positioning pin 10 may be interference-fitted.
In one embodiment, one end of the casing 3 is matched with the shaft hole of the end cover 6, and the matching surface is a cylindrical surface, specifically, the outer side wall of one end of the casing 3 and the inner side wall of the end cover 6 are cylindrical surfaces matched with each other, or the inner side wall of the casing 3 and the outer side wall of the end cover 6 are cylindrical surfaces matched with each other, on the basis, the third positioning structure may include a second positioning pin 12; and a second positioning hole 13 matched with the second positioning pin 12 in a positioning way is formed in the inner side wall of one end of the machine shell 3 and the outer side wall of the end cover 6. The second positioning hole 13 and the second positioning pin 12 may be interference-fitted.
The end cap 6 may be fixed to the casing 3 by screws.
The invention also provides an assembly method based on the motor structure, which comprises the following steps:
mounting the hall element 8 on the circuit board 7; the Hall element 8 can be welded on the circuit board 7 through a welding tool, so that the position of the Hall element 8 relative to the circuit board 7 is ensured;
the circuit board 7 is connected with the end cover 6 in a positioning way, and then the end cover 6 is connected with the shell 3 in a positioning way;
the housing 3 and the stator core 4 are positioned and connected.
In one embodiment, positioning and connecting the housing 3 and the stator core 4 includes:
and installing a positioning key 9 at the key slot 5 of the stator core 4, aligning the positioning key 9 to the key slot 5 of the machine shell 3, and inserting the stator core 4 into the machine shell 3.
In one embodiment, after the key slots 5 are machined on both the inner side wall of the housing 3 and the outer side wall of the stator core 4, the slot number of each slot is defined according to fig. 2 with the key slot 5 of the stator core 4 as a starting position, and the stator winding is wound according to fig. 3 to determine the phase sequence position of the motor.
In one embodiment, positioning the circuit board 7 and the end cap 6, and positioning the end cap 6 and the housing 3 comprises:
respectively processing a first positioning hole 11 and a second positioning hole 13 on the circuit board 7, the shell 3 and the end cover 6;
inserting two ends of a first positioning pin 10 into a first positioning hole 11 of the end cover 6 and a first positioning hole 11 of the circuit board 7 respectively, and fixing the circuit board 7 to the end cover 6 by using screws;
inserting the end cover 6 into the housing 3, specifically, one end of the housing 3 is a cylindrical hole, one end of the end cover 6 is provided with a cylindrical shaft which is in positioning fit with the cylindrical hole, inserting the cylindrical shaft into the cylindrical hole, then inserting the second positioning pin 12 into the second positioning hole 13 of the end cover 6 and the second positioning hole 13 of the housing 3, respectively, and fixing the end cover 6 to the housing 3 with screws.
In the description herein, reference to the description of the terms "one embodiment/mode," "some embodiments/modes," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
It will be appreciated by those skilled in the art that the above embodiments are only for clarity of illustration of the invention, and are not intended to limit the scope of the invention. Other variations or modifications will occur to those skilled in the art based on the foregoing disclosure and are within the scope of the invention.
Claims (10)
1. An electric machine, comprising: the motor comprises a shell (3), a stator core (4), an end cover (6), a circuit board (7) and a Hall element (8) arranged on the circuit board (7);
the stator core (4) and the circuit board (7) are both positioned in the shell (3);
the stator core (4) is fixedly connected with the shell (3) through a first positioning structure;
the circuit board (7) is fixedly connected with the end cover (6) through a second positioning structure;
the end cover (6) is fixedly connected with the shell (3) through a third positioning structure.
2. The machine according to claim 1, characterized in that the first positioning structure comprises a positioning key (9);
the inner side wall of the shell (3) and the outer side wall of the stator core (4) are both provided with key grooves (5) matched with the positioning keys (9) in a positioning mode.
3. An electric machine according to claim 2, characterized in that the key slot (5) of the housing (3) opens at least to one end face of the housing (3).
4. An electric machine according to claim 2 or 3, characterized in that the centre axis of the positioning key (9) coincides with the magnetomotive force axis of the stator core (4).
5. The machine according to claim 1, characterized in that the second positioning structure comprises a first positioning pin (10) and a first positioning hole (11) in positioning engagement with the first positioning pin (10);
the end cover (6) and the circuit board (7) are both provided with the first positioning hole (11), and two ends of the first positioning pin (10) are respectively inserted into the first positioning hole (11) of the end cover (6) and the first positioning hole (11) of the circuit board (7); or, one of the end cover (6) and the circuit board (7) is provided with the first positioning hole (11), and the other is fixed with the first positioning pin (10) inserted into the first positioning hole (11).
6. The motor according to claim 1, characterized in that one end of the casing (3) is matched with the shaft hole of the end cover (6), and the matching surface is a cylindrical surface;
the third positioning structure comprises a second positioning pin (12);
and a second positioning hole (13) which is matched with the second positioning pin (12) in a positioning way is formed in the inner side wall of one end of the machine shell (3) and the outer side wall of the end cover (6).
7. The assembling method of an electric motor according to any one of claims 1 to 6, comprising:
mounting the Hall element (8) on the circuit board (7);
the circuit board (7) is connected with the end cover (6) in a positioning way, and then the end cover (6) is connected with the shell (3) in a positioning way;
and the shell (3) is connected with the stator core (4) in a positioning way.
8. The assembly method of an electric machine according to claim 7, wherein said positioning the housing (3) and the stator core (4) comprises:
key grooves (5) are processed on the inner side wall of the shell (3) and the outer side wall of the stator core (4);
and a positioning key (9) is arranged at the key groove (5) of the stator core (4), then the positioning key (9) is aligned to the key groove (5) of the machine shell (3), and the stator core (4) is inserted into the machine shell (3).
9. The assembling method of the motor according to claim 8, wherein after the key slots (5) are formed on both the inner side wall of the casing (3) and the outer side wall of the stator core (4), the stator winding is wound with the key slots (5) of the stator core (4) as a starting position, thereby determining the phase sequence position of the motor.
10. The method of assembling an electric machine according to claim 7, wherein the positioning the circuit board (7) and the end cap (6) and the positioning the end cap (6) and the housing (3) comprises:
respectively processing a first positioning hole (11) and a second positioning hole (13) on the circuit board (7), the shell (3) and the end cover (6);
inserting two ends of a first positioning pin (10) into a first positioning hole (11) of the end cover (6) and a first positioning hole (11) of the circuit board (7) respectively, and fixing the circuit board (7) to the end cover (6) by using screws;
the end cover (6) is inserted into the machine shell (3), the second positioning pins (12) are respectively inserted into the second positioning holes (13) of the end cover (6) and the second positioning holes (13) of the machine shell (3), and the end cover (6) is fixed to the machine shell (3) through screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210311393.2A CN114679014A (en) | 2022-03-28 | 2022-03-28 | Motor and assembling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210311393.2A CN114679014A (en) | 2022-03-28 | 2022-03-28 | Motor and assembling method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114679014A true CN114679014A (en) | 2022-06-28 |
Family
ID=82077146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210311393.2A Pending CN114679014A (en) | 2022-03-28 | 2022-03-28 | Motor and assembling method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114679014A (en) |
-
2022
- 2022-03-28 CN CN202210311393.2A patent/CN114679014A/en active Pending
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