CN109193998B - End cover and motor with same - Google Patents
End cover and motor with same Download PDFInfo
- Publication number
- CN109193998B CN109193998B CN201811276940.8A CN201811276940A CN109193998B CN 109193998 B CN109193998 B CN 109193998B CN 201811276940 A CN201811276940 A CN 201811276940A CN 109193998 B CN109193998 B CN 109193998B
- Authority
- CN
- China
- Prior art keywords
- end cover
- stator assembly
- central axis
- end cap
- motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
-
- 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
Abstract
The invention relates to an end cover and a motor provided with the same, wherein the end cover is provided with a central axis, the end surface of the end cover facing a stator assembly is provided with a mounting groove for assembling the stator assembly, and the groove wall of the mounting groove adjacent to the central axis is provided with an avoiding surface corresponding to an electrified part on the stator assembly; the avoidance surface and the charged component meet the preset safety condition. According to the end cover, the avoiding surface is arranged on the groove wall of the mounting groove, which is adjacent to the central axis, and the avoiding surface is sunken relative to the groove wall along the radial direction of the end cover towards the central axis direction of the end cover so as to avoid the electrified part, so that the avoiding surface only compresses the size of the avoiding surface from the central axis direction of the end cover, and the size of the end cover cannot be increased outwards along the radial direction or the axial direction, so that the preset safety condition is met between the electrified part and the end cover so as to ensure the safe operation of the motor, the overlarge axial and radial sizes of the motor are avoided, the motor production process is simplified, the motor production difficulty is reduced, and.
Description
Technical Field
The invention relates to the technical field of motors, in particular to an end cover and a motor with the same.
Background
The motor is an electromagnetic device for realizing electric energy conversion or transmission according to the electromagnetic induction law, and is widely applied to various aspects of production and life as a power source of electrical appliances or various machines. In order to meet the electrical safety requirements, the stator and the end cover of the motor are assembled to meet the required electrical clearance and creepage distance, but the overall installation size of the motor is increased to a certain extent, so that the miniaturization development of a device provided with the motor is not facilitated.
At present, in order to increase the torque density of the motor (i.e. reduce the installation size of the motor under the same output torque) while satisfying the electrical safety, an insulation-type gasket is usually added to increase the minimum distance of the space between the stator and the accessible surface of the end cover, and the minimum distance measured along the surface of the insulation material, so that the electrical clearance and the creepage distance of the motor meet the requirements. However, by adopting the mode, the design and production difficulty of the motor is increased, and the size of the motor is increased to a certain extent.
Disclosure of Invention
In view of this, it is necessary to provide an end cover and a motor provided with the same, which can reduce the size of the motor while ensuring electrical safety, in order to solve the problem that the size of the motor cannot be reduced while ensuring electrical safety.
An end cover can be fixed relative to a stator assembly, the end cover is provided with a central axis, an end face, facing the stator assembly, of the end cover is provided with a mounting groove for assembling the stator assembly, and a groove wall, adjacent to the central axis, of the mounting groove is provided with an avoiding surface corresponding to an electrified part on the stator assembly;
and a preset safety condition is met between the avoiding surface and the electrified part.
According to the end cover, the avoiding surface is arranged on the groove wall of the mounting groove, which is adjacent to the central axis, and the avoiding surface is sunken relative to the groove wall along the radial direction of the end cover towards the central axis direction of the end cover so as to avoid the electrified part, so that the avoiding surface only compresses the size of the avoiding surface from the central axis direction of the end cover, and the size of the end cover cannot be increased outwards along the radial direction or the axial direction, so that the preset safety condition is met between the electrified part and the end cover so as to ensure the safe operation of the motor, the overlarge axial and radial sizes of the motor are avoided, the motor production process is simplified, the motor production difficulty is reduced, and.
In one embodiment, a plurality of the relief surfaces are spaced circumferentially about the central axis along the end cap.
In one embodiment, the preset safety condition comprises a preset creepage distance and/or a preset electrical clearance.
In one embodiment, the end cover comprises a main end face perpendicular to the central axis, the main end face is provided with an identification component, and the identification component comprises a plurality of first identification pieces and at least one second identification piece different from the first identification pieces and is used for identifying a target assembly angle of the end cover and the stator assembly.
In one embodiment, the first markers and the at least one second marker are circumferentially arranged around the central axis in a protruding manner at intervals on the main end surface, and the lengths of the first markers and the second markers in the radial direction of the end cover are different.
In one embodiment, the end cover is provided with a positioning boss, and when the end cover is assembled on the stator assembly at the target assembly angle, the positioning boss is used for limiting the circumferential displacement of the end cover and the stator assembly.
In one embodiment, when the end cover is assembled to the stator assembly at the target assembly angle, each of the avoiding surfaces is arranged corresponding to each of the groups of the electrified parts, and a connecting line between the electrified part and the central axis passes through the avoiding surfaces.
In one embodiment, the mounting slot is an interference fit with the stator assembly.
An electric machine comprises the end cover.
In one embodiment, the motor further comprises a stator assembly, the stator assembly is mounted on the end cover, the stator assembly is provided with at least one set of electrified components along the circumferential direction, and each set of electrified components is arranged corresponding to one avoidance surface.
Drawings
FIG. 1 is a schematic view of an assembly of a stator assembly and an end cap according to an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a schematic structural view of the stator assembly shown in FIG. 1;
FIG. 4 is a schematic structural view of the end cap shown in FIG. 1;
FIG. 5 is a front view of the end cap shown in FIG. 4;
figure 6 is a cross-sectional view of the end cap shown in figure 5 taken along line B-B.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, an electric machine (not shown) according to an embodiment of the present invention includes a stator assembly 40 and an end cover 20 installed at one end of the stator assembly 40 in a central axis direction, and the end cover 20 is fixed relative to the stator assembly 40 so as not to rotate relative to the stator assembly 40.
As shown in fig. 3, the stator assembly 40 is a substantially hollow cylindrical structure, and includes a stator core, a bobbin, a coil winding, and a housing 41, wherein the stator core is a hollow cylindrical structure, and the rotor is accommodated in the stator core. The winding frame is sleeved outside the stator core, the coil winding is wound on the winding frame, and the insulating shell 41 is coated outside the winding frame and the coil winding.
The stator assembly 40 further includes a live part 45 and an insulating structure 43, wherein the insulating structure 43 is disposed at one end of the bobbin in the central axis direction of the stator assembly 40. The electrified components 45 are in multiple groups, the multiple groups of electrified components 45 are arranged at intervals around the central axis direction of the stator assembly 40, each group of electrified components 45 at least comprises one electrified component 45, one end of each electrified component 45 is electrically connected to the winding frame, the other end of each electrified component 45 penetrates through the central axis direction of the stator assembly 40 and protrudes out of the insulating structure 43, the inner side wall of the shell 41 is provided with a concave surface 412 which is concave towards the central axis direction far away from the stator assembly 40, and the concave surface 412 corresponds to the electrified components 45 to form a certain interval distance with the electrified components 45 so as to ensure electrical safety.
As shown in fig. 1, 4-6, the end cap 20 has a central axis, the cap is disposed at the end of the stator assembly 40 where the live part 45 is disposed, and the central axis of the main body of the end cap 20 coincides with the central axis of the stator assembly 40. The end cover 20 comprises a hollow cylindrical connecting structure 21 and a main end face 22 surrounding the connecting structure 21, the connecting structure 21 is used for penetrating through a transmission shaft, and the main end face 22 is perpendicular to the central axis of the end cover 20 and used for covering one end of the stator assembly 40 to play roles of isolating, preventing dust and connecting the stator assembly 40.
As shown in fig. 1, 2 and 6, the end surface of the main end surface 22 facing the stator assembly 40 is provided with a mounting groove 23 for mounting the stator assembly 40, and the mounting groove 23 circumferentially surrounds the central axis of the end cover 20. The housing 41 of the stator assembly 40 is held in the mounting groove 23 toward the side wall of the end cover 20 and is in interference fit with the mounting groove 23, thereby preventing the stator assembly 40 from rotating relative to the main body of the end cover 20.
The groove wall of the mounting groove 23 adjacent to the central axis is provided with an avoiding surface 234 corresponding to the charged part 45 on the stator assembly 40, and a preset safety condition is met between the avoiding surface 234 and the charged part 45.
In the end cover 20, the avoiding surface 234 is arranged on the groove wall of the mounting groove 23 adjacent to the central axis, and the avoiding surface 234 is recessed relative to the groove wall in the direction of the central axis of the end cover 20 along the radial direction of the end cover 20 to avoid the electrified component 45, so that the avoiding surface 234 only compresses the size of the avoiding surface from the direction of the central axis of the end cover 20, and the size of the end cover 20 cannot be increased radially or axially outwards, thereby satisfying the preset safety condition between the electrified component 45 and the end cover 20 to ensure the safe operation of the motor, avoiding the overlarge axial and radial sizes of the motor, simplifying the motor production process, reducing the motor production difficulty, and reducing the mounting size of the motor.
In particular, in some embodiments, the preset safety condition includes a preset creepage distance and/or a preset electrical clearance, thereby ensuring electrical safety. The creepage distance is the shortest distance between two adjacent conductors or between one conductor and the surface of the adjacent motor casing, which is measured along the insulating surface, and specifically, in the present application, the preset creepage distance is the shortest distance between the live part 45 and the avoiding surface 234, which is measured along the surface of the end cover 20. The electrical gap is the shortest distance between two adjacent conductors or between one conductor and the surface of the adjacent motor casing, which is measured along the air, and specifically, in this application, the preset electrical gap is the shortest distance between the electrified part 45 and the avoiding surface 234, which is measured along the air. Because the distance between the avoiding surface 234 and the charged part 45 is greater than the preset creepage distance and the preset electric clearance, the phenomena of electrification and electric breakdown caused by the electric polarization of the end cover 20 around the charged part 45 are avoided, and the stability of the electric performance of the motor is ensured.
Further, since the number of the charging members 45 is plural, the escape surface 234 is plural and the number is the same as the number of the groups of the charging members 45. A plurality of escape surfaces 234 are spaced about the central axis of the end cap 20 such that each set of live parts 45 corresponds to a respective one of the escape surfaces 234.
As shown in fig. 1 and 3, the end cap 20 further includes a marking assembly disposed on the main end surface 22 of the end cap 20, including a plurality of first marking members 252 and at least one first marking member 254 different from the first marking members 252. The identification component is used for identifying a target assembly angle of the end cover 20 and the stator assembly 40, and the external installation device can identify the installation direction of the end cover 20 by scanning the identification component, so that the end cover 20 is installed on the stator assembly 40 at the target assembly angle.
In some embodiments, a plurality of first indicators 252 and at least one first indicator 254 are circumferentially spaced about the central axis of the end cap 20 at the major end surface 22 of the end cap 20, and the first indicators 252 and the second indicators 254 have different lengths in the radial direction of the end cap 20, thereby facilitating identification by an external installation device.
Specifically, in one embodiment, the positioning structure includes a plurality of first identifiers 252 and a first identifier 254, the first identifiers 252 and the first identifier 254 are both ribs protruding from the main end surface 22 in a direction away from the stator assembly 40, the plurality of first identifiers 252 and the first identifier 254 are circumferentially and equidistantly disposed on the main end surface 22, the first identifiers 252 and the first identifier 254 extend in a radial direction of the end cover 20, and a dimension of the first identifier 254 in the radial direction of the end cover 20 is smaller than a dimension of the first identifier 252 in the radial direction of the end cover 20.
In this way, the external mounting device can obtain the position of the first identifier 254 by recognizing the lengths of the first identifier 252 and the first identifier 254, so as to obtain the assembly angle of the end cover 20 in the circumferential direction, and finally, the end cover 20 is accurately fixed to the stator assembly 40 at the target assembly angle, so that each avoiding surface 234 and each group of the charged members 45 are accurately arranged in correspondence, and the connection line between each charged member 45 and the central axis of the end cover 20 passes through the avoiding surface 234.
As shown in fig. 3 and 4, in some embodiments, a positioning boss 221 is further disposed on an edge of the main end surface 22, a positioning groove is disposed on an edge of the housing 41 of the stator assembly 40, when the end cover 20 is assembled to the stator assembly 40 at a target assembly angle, the positioning boss 221 is inserted into the positioning groove, and the positioning boss 221 is used for limiting circumferential displacement of the end cover 20 and the stator assembly 40, so as to achieve accurate positioning of the end cover 20, and prevent the end cover 20 and the stator assembly 40 from rotating relatively.
The end cover 20 and the motor provided with the end cover 20 are provided with the avoidance surface 234 which avoids the charged member 45 in the radial direction, so that the safe distance between the charged member 45 and the end cover 20 can be satisfied without adding structures such as an insulating spacer, and the stability of the electrical performance of the motor can be ensured. Meanwhile, the oversize of the end cover 20 cannot be caused, so that the structure of the motor is more compact, the motor is miniaturized, the production difficulty of the motor is effectively reduced, and the product percent of pass is improved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An end cover (20) capable of being fixed relative to a stator assembly (40), wherein the end cover (20) has a central axis, an end surface of the end cover (20) facing the stator assembly (40) is provided with a mounting groove (23) for assembling the stator assembly (40), a groove wall of the mounting groove (23) adjacent to the central axis is provided with an avoiding surface (234) corresponding to an electrified component (45) on the stator assembly (40), and the avoiding surface (234) is recessed relative to the groove wall along the radial direction of the end cover (20) towards the central axis direction of the end cover (20);
the avoidance surface (234) and the charged component (45) meet preset safety conditions.
2. The end cap (20) of claim 1, wherein the relief surface (234) is a plurality of relief surfaces (234), the plurality of relief surfaces (234) being spaced circumferentially of the end cap (20) about the central axis.
3. The end cap (20) of claim 1, wherein the preset safety condition comprises a preset creepage distance and/or a preset electrical clearance.
4. The end cap (20) of any of claims 1-3, wherein the end cap (20) includes a major end surface (22) perpendicular to the central axis, the major end surface (22) having disposed thereon an identification assembly including a plurality of first identification members (252) and at least one second identification member (254) different from the first identification members (252) for identifying a target assembly angle of the end cap (20) to the stator assembly (40).
5. The end cap (20) of claim 4, wherein the plurality of first indicators (252) and the at least one second indicator (254) project from the major end surface (22) at circumferentially spaced intervals about the central axis, and the first indicators (252) and the second indicators (254) differ in length in a radial direction of the end cap (20).
6. The end cover (20) of claim 4, wherein the end cover (20) is provided with a positioning boss (221), the positioning boss (221) being used for limiting circumferential displacement of the end cover (20) and the stator assembly (40) when the end cover (20) is assembled to the stator assembly (40) at the target assembly angle.
7. The end cap (20) of claim 4, wherein each said relief surface (234) is disposed in correspondence with each said set of live parts (45) when said end cap (20) is assembled to said stator assembly (40) at said target assembly angle, a line connecting said live parts (45) to said central axis passing through said relief surface (234).
8. The end cover (20) of claim 1, wherein the mounting slot (23) is an interference fit with the stator assembly (40).
9. An electrical machine, characterized by comprising an end cap (20) according to any one of claims 1-8.
10. The electric machine of claim 9, further comprising a stator assembly (40), wherein the stator assembly (40) is mounted to the end cap (20), and wherein the stator assembly (40) is circumferentially provided with at least one set of live parts (45), and wherein each set of live parts (45) is disposed in correspondence with one of the bypass surfaces (234).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811276940.8A CN109193998B (en) | 2018-10-30 | 2018-10-30 | End cover and motor with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811276940.8A CN109193998B (en) | 2018-10-30 | 2018-10-30 | End cover and motor with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109193998A CN109193998A (en) | 2019-01-11 |
| CN109193998B true CN109193998B (en) | 2019-12-31 |
Family
ID=64940653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811276940.8A Active CN109193998B (en) | 2018-10-30 | 2018-10-30 | End cover and motor with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109193998B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201758317U (en) * | 2010-07-07 | 2011-03-09 | 珠海格力电器股份有限公司 | Motor |
| CN202374083U (en) * | 2011-12-13 | 2012-08-08 | 珠海格力电器股份有限公司 | Plastic sealed motor |
| CN105099013B (en) * | 2014-04-23 | 2019-05-03 | 德昌电机(深圳)有限公司 | The motor of motor stator component and the application stator module |
| CN205407455U (en) * | 2016-01-11 | 2016-07-27 | 珠海格力电器股份有限公司 | A end cover and plastic envelope direct current motor for plastic envelope direct current motor |
| CN107453509B (en) * | 2017-08-21 | 2023-06-27 | 珠海格力节能环保制冷技术研究中心有限公司 | Insulating block, motor with insulating block and motor installation method |
| CN108365691A (en) * | 2018-05-15 | 2018-08-03 | 中山大洋电机股份有限公司 | A kind of electric motor end cap and its motor of application |
| CN208904805U (en) * | 2018-10-30 | 2019-05-24 | 珠海格力电器股份有限公司 | End cap and motor equipped with it |
-
2018
- 2018-10-30 CN CN201811276940.8A patent/CN109193998B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109193998A (en) | 2019-01-11 |
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