CN112117853B - Stator assembly of motor, manufacturing method thereof and stator of motor - Google Patents
Stator assembly of motor, manufacturing method thereof and stator of motor Download PDFInfo
- Publication number
- CN112117853B CN112117853B CN201910531219.7A CN201910531219A CN112117853B CN 112117853 B CN112117853 B CN 112117853B CN 201910531219 A CN201910531219 A CN 201910531219A CN 112117853 B CN112117853 B CN 112117853B
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- lead
- stator assembly
- stator
- wire clamp
- winding
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- 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
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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
- H02K15/0056—Manufacturing winding connections
- H02K15/0068—Connecting winding sections; Forming leads; Connecting leads to terminals
Abstract
The embodiment of the application provides a stator assembly of a motor, a manufacturing method thereof and a stator of the motor, wherein the stator assembly of the motor is provided with: a lead for passing an electric current; the winding is formed by winding a conductive material and is electrically connected with the lead; and an upper frame for supporting the winding and the lead wire, the upper frame having a cylindrical shape extending in an axial direction, a wall portion extending in the axial direction, and a lead wire receiving groove formed to penetrate the wall portion in a radial direction, the lead wire receiving groove being formed with an opening at an upper side in the axial direction, wherein the lead wire passes through the lead wire receiving groove in the radial direction to extend to a radially outer side of the upper frame, the stator assembly of the motor further having: and the wire clamp is clamped on the upper framework and covers the opening of the lead clamping groove. According to the embodiment of the application, the lead can be reliably guided and fixed, the lead which is led out is conveniently bent along the axial direction, and the stator assembly is miniaturized.
Description
Technical Field
The present disclosure relates to the field of electrical and mechanical devices, and more particularly, to a stator assembly of an electrical machine, a method of manufacturing the same, and a stator of the electrical machine.
Background
In the water pump industry, the low power industrial motor industry or in certain household areas, the motor usually has the following parts: stator module, rotor subassembly, casing, front end housing and rear end cap. The stator assembly and the shell are installed and locked through an axial positioning structure after being in interference hot sleeve, interference cold pressing or clearance fit.
In order to meet the mode that the stator assembly is assembled with the machine shell along the axial direction, the lead of the stator assembly needs to be led out along the axial direction in the end area of the iron core and then led out to the outside of the motor through the lead hole.
Currently, a commonly used lead-out structure includes:
structure 2, for the stator assembly of the concentrated winding motor, fixing the lead wire and the combined part of the enameled wire (i.e. the welding or crimping part of the heat-shrinkable sleeve and the lead wire enameled wire) by designing a structure for fixing on the stator or the insulating skeleton;
structure 3, to the stator module of concentrated winding motor, also can be through increasing mag-mate terminal structure on the stator, realize enameled wire and lead wire be connected and fixed.
It should be noted that the above background description is only for the convenience of clear and complete description of the technical solutions of the present application and for the understanding of those skilled in the art. Such solutions are not considered to be known to the person skilled in the art merely because they have been set forth in the background section of the present application.
Disclosure of Invention
The inventor of the present application has found that the existing structures for leading out the lead wires from the stator assembly have limitations, such as:
in the structure 1, the fixed position of the combined part of the lead wire and the enameled wire is relatively random, so that the reliability cannot be ensured, and the stator injection molding cannot be performed because the binding, the paint dipping and other treatments are required to be performed after manual fixing, or the stator injection molding process is too complex and the cost is relatively high;
in the structure 2, the structure for fixing can increase the outer diameter of the stator component, so that the volume and the cost of the motor are increased, in addition, the structure 2 also needs to be fixed manually and then is subjected to treatments such as binding and paint dipping, and stator injection molding cannot be performed, or the stator injection molding process is too complicated and has higher cost, or after injection molding, leads exceed the outer edge of the stator component, so that the assembly of the stator component and the shell is influenced;
in the above structure 3, since the Mag-mate terminal structure is added, the outer diameter and cost of the stator assembly are increased, thereby increasing the volume and cost of the motor, and further, in order to ensure that the Mag-mate terminal structure has good contact and conductivity, direct injection molding cannot be performed in the above structure 3.
In order to solve at least one of the above-described problems or other similar problems, the present application provides a stator assembly of a motor, a method of manufacturing the same, and a stator of a motor, in which a lead is guided and fixed by a lead catching groove provided in an axial direction of an upper frame and a clip engaged with the upper frame, thereby being capable of reliably guiding and fixing the lead and miniaturizing the stator assembly.
According to an aspect of an embodiment of the present application, there is provided a stator assembly of an electric machine having: a lead for passing an electric current; the winding is formed by winding a conductive material and is electrically connected with the lead; and an upper frame for supporting the winding and the lead wire, the upper frame having a cylindrical shape extending in an axial direction, a wall portion extending in the axial direction, and a lead wire receiving groove formed to penetrate the wall portion in a radial direction, the lead wire receiving groove being formed with an opening at an upper side in the axial direction, wherein the lead wire passes through the lead wire receiving groove in the radial direction to extend to a radially outer side of the upper frame, the stator assembly of the motor further having: and the wire clamp is clamped on the upper framework and covers the opening of the lead clamping groove.
According to another aspect of embodiments of the present application, there is provided a stator of an electric machine having a stator housing, and a stator assembly of the electric machine as described in one aspect of the embodiments above, wherein the stator assembly of the electric machine is mounted in the stator housing.
According to yet another aspect of embodiments of the present application, there is provided a manufacturing method for manufacturing a stator assembly of an electric machine of one aspect of the above-described embodiments, the manufacturing method including:
installing the upper framework and the winding into a whole, and guiding the lead from the lead clamping groove to the radial outer side of the upper framework; and clamping the wire clamp on the upper framework.
The beneficial effect of this application lies in: the lead wire can be reliably guided and fixed, the lead wire led out is convenient to bend along the axial direction, and the stator assembly is miniaturized.
Specific embodiments of the present application are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the application may be employed. It should be understood that the embodiments of the present application are not so limited in scope. The embodiments of the application include many variations, modifications and equivalents within the spirit and scope of the appended claims.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the application, are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
fig. 1 is a perspective view of the stator assembly of the present embodiment;
FIG. 2 is a schematic view of the upper frame of example 1 of the present application;
fig. 3 is a schematic view of a wire clamp of embodiment 1 of the present application;
fig. 4 is a perspective view of a stator assembly according to embodiment 1 of the present application provided with an injection molding material;
fig. 5 is a schematic view of a method of manufacturing a stator assembly of embodiment 1 of the present application;
fig. 6 is a schematic view of a method of manufacturing a stator assembly of embodiment 1 of the present application;
figure 7 is a schematic view of the various steps of the method of manufacturing the stator assembly of embodiment 1 of the present application;
fig. 8 is a schematic view of a stator of embodiment 2 of the present application.
Detailed Description
The foregoing and other features of the present application will become apparent from the following description with reference to the accompanying drawings. In the description and drawings, particular embodiments of the application are disclosed in detail as being indicative of some of the embodiments in which the principles of the application may be employed, it being understood that the application is not limited to the embodiments described, but, on the contrary, is intended to cover all modifications, variations, and equivalents falling within the scope of the appended claims.
In the embodiments of the present application, the terms "first", "second", and the like are used for distinguishing different elements by reference, but do not denote a spatial arrangement, a temporal order, or the like of the elements, and the elements should not be limited by the terms. The term "and/or" includes any and all combinations of one or more of the associated listed terms. The terms "comprising," "including," "having," and the like, refer to the presence of stated features, elements, components, and do not preclude the presence or addition of one or more other features, elements, components, and elements.
In the embodiments of the present application, the singular forms "a", "an", and the like include the plural forms and are to be construed broadly as "a" or "an" and not limited to the meaning of "a" or "an"; furthermore, the term "the" should be understood to include both the singular and the plural, unless the context clearly dictates otherwise. Further, the term "according to" should be understood as "at least partially according to … …," and the term "based on" should be understood as "based at least partially on … …," unless the context clearly dictates otherwise.
In the following description of the embodiments of the present application, for the sake of convenience of description, a direction in which the cylindrical center axis of the upper frame extends is referred to as an "axial direction"; in the "axial direction", the direction in which the upper skeleton is directed toward the lower skeleton is referred to as the "lower" direction, and the direction opposite to the "lower" direction is the "upper" direction; a radial direction centered on the central axis is referred to as a "radial direction"; the direction around the center axis is referred to as "circumferential direction".
Example 1
The embodiment 1 of the application provides a stator assembly of a motor.
Fig. 1 is a schematic perspective view of a stator assembly according to an embodiment of the present application, and as shown in fig. 1, the stator assembly 1 includes: lead wire 11, winding 12, upper frame 13 and clip 14.
In some embodiments, the leads 11 are used to pass current; the winding 12 is formed by winding a conductive material and is electrically connected with the lead 11, for example, the winding 12 may be formed by winding a copper enameled wire or an aluminum enameled wire; the upper bobbin 13 is for supporting the winding 12 and the lead wire 11, the upper bobbin 13 being made of, for example, an insulating material; the clip 14 is engaged with the upper frame 13, and the clip 14 is made of an insulating material, for example.
Fig. 2 a) is a schematic perspective view of the upper frame 13, fig. 2 b) is a partially enlarged view of a), fig. 2C) is a front view of a partially enlarged view of a dashed circle of b) which is a partially enlarged view of a), fig. 2D) is a top view of the upper frame 13, fig. 2 e) is a cross-sectional view in the C-C direction of D), and fig. 2 f) is a cross-sectional view in the D-D direction of D).
As shown in a) of fig. 2, the upper frame 13 is cylindrical and extends in the axial direction C1, and includes a wall portion 131 extending in the axial direction and a lead wire engaging groove 132 formed to penetrate the wall portion 131 in the radial direction. F) of fig. 2 also shows a cross section of lead card slot 132.
As shown in b) and c) of fig. 2, the lead wire card slot 132 is formed with an opening 132a on the axially upper side, and the lead wire 11 (not shown in fig. 2) can extend through the lead wire card slot 132 to the radially outer side of the upper bobbin 13 in the radial direction. Thus, the lead wire engaging groove 132 can restrict the movement of the lead wire 11 in the circumferential direction of the upper frame 13.
In some embodiments, the clip 14 can cover the opening 132a of the lead wire slot 132 when the clip 14 is engaged with the upper frame 13, so that the clip 14 and the lead wire slot 132 together limit the movement of the lead wire 11 in the axial direction of the upper frame 13. In addition, in the case of performing the injection molding process on the stator assembly 1, the clip 14 can prevent the injection molding material from entering the lead wire catching groove 132.
In some embodiments, when the lead wire pocket 132 is mated with the clip 14, the clip 14 may radially divide the lead wire pocket 132 into two portions, a first portion opposite the clip 14, and a second portion not opposite the clip 14. In the first part, the clip 14 fixes the lead wire 11 by clamping the lead wire 11 together with the lead wire slot 132, and in the second part, the clip 14 does not fix the lead wire 11, so that the lead wire 11 can be bent in the lead wire slot 132, and the bending direction is, for example, in the axial direction.
According to the embodiment 1 of the application, the stator assembly of the motor is provided with the lead clamping groove arranged along the axial direction of the upper framework and the wire clamp clamped on the upper framework, so that the lead can be reliably guided and fixed, the lead led out can be conveniently bent along the axial direction, and the stator assembly is kept miniaturized; in addition, the wire clamp 14 prevents injection molding material from entering the lead clamping groove 132, so that the risk that injection molding material overflows from the lead clamping groove in the injection molding process to cause reduction of lead bending space or incapability of bending in the range of the outer edge of the stator can be reduced.
In some embodiments, as shown in a) of fig. 2, the wall portion 131 of the upper frame 13 has a frame wire fixing portion 1311 and a wall body portion 1312 in the circumferential direction, and the wire catching groove 132 is formed in the frame wire fixing portion 1311.
The radial dimension of the bobbin lead fixing portion 1311 is larger than the radial dimension of the wall body portion 1312, and for example, the inner wall surface in the radial direction of the bobbin lead fixing portion 1311 and the inner wall surface in the radial direction of the wall body portion 1312 are provided continuously, and the outer wall surface in the radial direction of the bobbin lead fixing portion 1311 is provided radially outward of the outer wall surface in the radial direction of the wall body portion 1312. Thus, the lead wire 11 can be reliably guided in the radial direction by the lead wire slot 132 of the frame lead fixing portion 1311.
As shown in a) of fig. 2, the circumferential dimension of the bobbin lead fixing portion 1311 may be smaller than the circumferential dimension of the wall body portion 1312, so that the material of the wall portion 131 can be saved and the cost can be reduced.
In some embodiments, as shown in b), c), e) of fig. 2, at least one side of the bobbin lead fixing portion 1311 in the circumferential direction is formed with a clip positioning surface 133, and the clip positioning surface 133 may restrict the position of the clip 14 in the circumferential direction of the wall portion 131. Further, the clip positioning surface 133 may extend in the axial direction, whereby the wire clip 14 may be guided to move in the axial direction to be mounted to the upper frame 13 during the mounting of the wire clip 14 to the upper frame 13.
In some embodiments, as shown in b), c), e) of fig. 2, the upper chassis 13 may also have a first clip clasp 134. The first clip catch 134 is formed on the radially outer wall surface of the wall 131, and the first clip catch 134 can engage with the clip 14 to restrict the axial displacement of the clip 14. For example, the first clip catch 134 may be formed on the wall body portion 1312 and located on at least one of circumferential two sides of the bobbin lead fixing portion 1311, and further, the first clip catch 134 may extend in the circumferential direction.
In e) of fig. 2, the first clip catch 134 may be a structure that protrudes radially outward from the wall portion 131, and the cross-section thereof is formed in a shape that is narrow at the upper portion and wide at the lower portion, which can facilitate the attachment of the clip 14 to the upper frame 13 from the top to the bottom and prevent the clip 14 from being separated from the upper frame 13 in the axial direction. In addition, the cross-section of the first clip clasp 134 can have other shapes, such as a saw-tooth shape, etc. The first clip catch 134 may be recessed radially inward from the wall portion 131.
Further, the position of the first clip catch 134 may not be limited thereto, and for example, the first clip catch 134 may be disposed on the clip positioning surface 133 and protrude or recess from the clip positioning surface 133 in the circumferential direction to the clip positioning surface 133.
As shown in a), d), and f) of fig. 2, the upper frame 13 may further include a winding support portion 135, and the winding support portion 135 may be located on the inner wall surface in the radial direction of the wall portion 131 and may protrude radially inward. The winding 12 (not shown in fig. 2) may be wound around the winding support 135.
A) of fig. 3 is a schematic perspective view of the clip 14, B) of fig. 3 is a schematic view of the clip 14 viewed in the circumferential direction, c) of fig. 3 is a schematic top view of the clip 14, d) of fig. 3 is a sectional view in the B-B direction of c), and e) of fig. 3 is a rear view of the clip 14.
As shown in a), b), e) of fig. 3, the wire clamp 14 has: a covering portion 141, a first leg portion 142, and a second leg portion 143.
As shown in a), b), and c) of fig. 3, the covering portion 141 includes a first covering portion 1411 and a second covering portion 1412 in the circumferential direction, and the first covering portion 1411 is located at least one end of the second covering portion 1412 in the circumferential direction. For example, the radial dimension of the second covering portion 1412 may be equal to or smaller than the radial dimension of the bobbin lead fixing portion 1311, and the radial dimension of the first covering portion 1411 may be equal to or larger than the radial dimension of the bobbin lead fixing portion 1311.
As shown in a) of fig. 3, the first leg portion 142 may extend axially downward from a radially outer end 1411a of the first cover portion 1411; the second leg portion 143 may extend axially downwardly from a radially inner end 1411b of the first cover portion. As a result, as shown in d) of fig. 3, the first leg portion 142, the first covering portion 1411, and the second leg portion 143 form an "n" shaped structure in the cross section of the first covering portion 1411. When the clip 14 is engaged with the upper frame 13, the first leg portion 142 may be engaged with a radially outer wall surface of the wall portion 131 of the upper frame 13, and the second leg portion 143 may be attached to a radially inner wall surface of the wall portion 131 of the upper frame 13.
In the present embodiment, as shown in d) of fig. 3, the radially inner surface 142a of the first leg portion 142 is formed with a second clip catch 144 that protrudes radially inward. The second clip catch 144 can engage with the first clip catch 134 to fix the position of the clip 14 in the axial direction of the upper frame 13.
Further, the position of the second clip catch 144 may not be limited thereto, and for example, in the case where the first clip catch 134 is provided on the clip positioning surface 133, the second clip catch 144 may be provided on a side wall 142b (as shown in a) of the first leg portion 142 near the second covering portion 1412), whereby the engagement of the second clip catch 144 with the first clip catch 134 can also be achieved. In addition, the second clip catch 144 may not be limited to a structure protruding from the surface, but may be a structure recessed from the surface.
The number of the first leg portions 142 and the second leg portions 143 is 2, and other numbers, for example, 1 or 3 or more, may be used.
In some embodiments, as shown in a), d), e) of fig. 3, the clip 14 may also have lead compression teeth 145. Wherein, the lead pressing tooth 145 may be a protrusion structure extending downward from the second covering portion 1412 in an axial direction. When the clip 14 is engaged with the upper frame 13, the lead pressing teeth 145 cover the opening 132a of the lead engaging groove 132, that is, the circumferential position of the lead pressing teeth 145 corresponds to the circumferential position of the opening 132a of the lead engaging groove 132. Therefore, the lead 12 in the lead clamping groove 132 is fixed through the lead pressing teeth 145, and the lead 12 is prevented from being separated from the lead clamping groove 132.
In some embodiments, the radial dimension of the lead pressing tooth 145 may be smaller than the radial dimension of the lead card slot 132, whereby, in the case where the lead pressing tooth 145 enters the lead card slot 132, the lead card slot 132 may be divided into the above-described first portion for fixing the lead 11 and the second portion for enabling the lead 11 to be bent.
In some embodiments, the number of lead compression teeth 145 may be the same as the number of lead slots 132.
Further, as shown in a) of fig. 3, the side wall 142b of the first leg portion 142 near the second covering portion 1412 may abut against the clip positioning surface 133 shown in c) of fig. 2, thereby guiding the clip 14 in the process of mounting the clip 14 to the upper frame 13 and fixing the circumferential position of the clip 14 after the mounting is completed.
In some embodiments, as shown in fig. 1, the stator assembly 1 of the electric machine may further have: a lower bobbin 15, and a stator core 16.
The lower bobbin 15 is located axially below the upper bobbin 13 for supporting the winding 12, and the lower bobbin 15 may be made of an insulating material. In addition, the lower frame 15 may also have a wire-passing slot and a support buckle (not shown) for winding transition.
The stator core 16 is located between the upper frame 13 and the lower frame 15 in the axial direction, wherein the stator core 16 may be formed by laminating a plurality of stator laminations in the axial direction. The stator core 16 may be formed with core slots that receive windings, whereby the windings 12 may be wound around the upper bobbin 13, the stator core 16, and the lower bobbin 15, thereby increasing the magnetic field strength of the stator.
Further, an insulating material having a shape conforming to the core slots may be installed in the core slots, thereby maintaining insulation between the stator core 16 and the windings 12.
In some embodiments, the stator assembly 1 of the electrical machine may also have an injection molded material portion. Fig. 4 is a perspective view of a stator assembly having a molded material portion disposed therein. As shown in fig. 4, in the stator assembly 1, the injection material portion 7 is used to close the gap of the winding 2.
In this embodiment, the injection molding material part 7 is made of a polymer material, and the space where the winding 2 is located can be sealed by providing the injection molding material part 7, so that the overall strength and the safety of the stator assembly 1 are improved.
In fig. 4, the lead 11 is bent to extend in the axial direction, and in fig. 1, the lead 11 is not bent in the axial direction. Since the stator assembly 1 of the present application fixes the lead wires 11 by the upper frame 13 and the clips 14, it is easy to fix and axially bend and draw out the lead wires 11, so that the lead wires 11 are bent from the state shown in fig. 1 to the axially bent state shown in fig. 4, in which the lead wires 11 can be axially bent in the above-described second portion of the lead wire slot 132, for example.
Although fig. 4 of the present embodiment shows the stator assembly 1 having the injection molded material portion 7, the present embodiment is not limited to this, and the stator assembly 1 may not have the injection molded material portion 7, and the lead wires 11 may be easily bent in the axial direction even when the injection molded material portion 7 is not provided.
Fig. 5 is a manufacturing method of manufacturing a stator assembly of the motor of embodiment 1, the stator assembly 1 having, for example, lead wires 11, windings 12, an upper bobbin 13, and a clip 14. The manufacturing method comprises the following steps:
and operation 502, clamping the wire clamp on the upper framework.
Fig. 6 is a manufacturing method of manufacturing a stator assembly of the motor of embodiment 1, and the stator assembly 1 has, for example, lead wires 11, windings 12, an upper bobbin 13, a clip 14, a lower bobbin 15, a stator core 16, and an injection molded material portion 7. The manufacturing method comprises the following steps:
in operation 603, a polymer material is injected to form a molding material portion.
Fig. 7 is a schematic view of the various steps of the manufacturing method described with respect to fig. 6.
A) of fig. 7 is a schematic view in which the lead wire 11 is guided from a lead wire card slot (not shown) to the radially outer side of the upper bobbin 13. As shown in a) of fig. 7, the lead wire 11 is guided radially outward of the upper bobbin 13.
B) of fig. 7 is a partially enlarged schematic view of a dotted circle of a), and as shown in b) of fig. 7, the lead wire 11 is guided from the lead wire notch 132 to the radially outer side of the upper bobbin 13. Furthermore, since the clip 14 has not yet been installed, the first clip catch 134 is shown in b) of fig. 7.
C) of fig. 7 is a schematic view of the mounting of the clip to the upper frame. As shown in c) of fig. 7, the clip 14 is attached to the upper frame 13 in the top-down direction indicated by the arrow a.
Fig. 7 d) is a schematic view of the clip being engaged with the upper frame. As shown in d) of fig. 7, the first clip catch 134 is not shown due to the shielding of the clip 14.
E) of fig. 7 is a side view of a partially enlarged view of the dotted circle of d), and as shown in e) of fig. 7, the upper frame 13 and the clip 14 fix the lead 11 together.
F) of fig. 7 is a front view of a partially enlarged view of the broken line circle of d), and as shown in f) of fig. 7, the lead pressing teeth 145 of the clip 14 fix the lead 11 from above the lead 11.
G) of fig. 7 is a cross-sectional view of a partial enlarged view of the dashed circle of d), as shown in g) of fig. 7, the first and second clip snaps 134, 144.
H) of fig. 7 is a perspective view of the injection molded material part 7 after it is formed. As shown in h) of fig. 7, the injection material portion 7 closes the space where the winding is located.
In this embodiment, after h) of fig. 7, the lead wires 11 may also be bent to extend in the axial direction (as shown in fig. 4), thereby facilitating the installation of the stator assembly 1 with the stator housing.
According to the embodiment of the application, the upper framework and the wire clamp are arranged, so that the lead can be fixed and led out, and the risk that the bending space of the lead is reduced or the lead cannot be bent within the range of the outer edge of the stator due to the fact that injection plastic overflows from a lead clamping groove in the injection molding process is prevented; in addition, the wire clamp and the upper framework are provided with corresponding buckles and guide structures, so that the fixation of the lead in a small radial and circumferential space and the sealing of injection molding materials can be realized, the axial bending and leading-out of the lead in the range of the outer edge of the stator are ensured, and the lead is prevented from interfering with a shell in the stator assembling process.
Compared with the prior art related to the background art, the stator assembly of the motor of the present embodiment has advantages: for example, compared with a lead leading-out fixing structure of a distributed winding stator, the structure of the embodiment is more stable and reliable, and the capability of the stator in electrical safety, moisture resistance and other severe working environments after injection molding is greatly improved; for example, compared with a concentrated winding motor, the stator assembly does not need to be additionally provided with a fixing structure and a corresponding space for fixing the joint part of the lead and the enameled wire, so that the overall structure of the stator assembly is more compact and reasonable, in addition, the lead can be bent and led out in a smaller space after the stator is injected, the process is simple, and the capability of the stator in electric safety and resisting severe working environments such as moisture and the like after the stator is injected is greatly improved; for another example, compared with a structure that the concentrated winding adopts a Mag-mate terminal, the stator assembly of the embodiment has a more compact and reasonable structure, and overcomes the defect that the structure adopting the Mag-mate terminal cannot be directly subjected to injection molding.
Example 2
The embodiment 2 of the present application provides a stator of an electric machine having the stator assembly 1 of the electric machine described in the embodiment 1. Since the stator assembly of the motor has already been described in detail in embodiment 1, the contents thereof are incorporated herein and the description thereof is omitted here.
In this embodiment, the stator of the motor may have a stator housing, and the stator assembly 1 of the motor described in embodiment 1, wherein the stator assembly 1 of the motor is installed in the stator housing.
A) of fig. 8 is a schematic view of a process of mounting the stator assembly of the motor to the stator case, and as shown in a) of fig. 8, the stator assembly 1 of the motor may be mounted to the inside of the stator case 81 in a direction shown by an arrow B, in which the lead wires 11 of the stator assembly 1 of the motor are bent axially.
B) of fig. 8 is a schematic view in which the stator assembly of the motor is mounted in the stator case, and c) of fig. 8 is an enlarged schematic view of a dotted coil portion of b), as shown in b) of fig. 8 and c) of fig. 8, the lead wires 11 of the stator assembly 1 of the motor are bent axially without interference with the stator case 81; and, the outer diameter of the stator assembly 1 of the motor is effectively controlled without a significant increase in the outer diameter due to the bending of the lead wires 11.
According to the embodiment, in the stator assembly of the motor, the lead wire is axially bent and led out within the range of the outer edge of the stator assembly, so that the lead wire is prevented from interfering with a stator shell in the assembling process of the stator assembly, and the miniaturization of the stator assembly and the stator is facilitated.
The present application has been described in conjunction with specific embodiments, but it should be understood by those skilled in the art that these descriptions are intended to be illustrative, and not limiting. Various modifications and adaptations of the present application may occur to those skilled in the art based on the spirit and principles of the application and are within the scope of the application.
Claims (12)
1. A stator assembly of an electric machine, the stator assembly of the electric machine comprising:
a lead for passing an electric current;
the winding is formed by winding a conductive material and is electrically connected with the lead; and
an upper frame for supporting the winding and the lead, the upper frame having a cylindrical shape extending in the axial direction, a wall portion extending in the axial direction, and a lead engaging groove formed to penetrate the wall portion in the radial direction, the lead engaging groove being formed with an opening on an upper side in the axial direction,
wherein the lead wire passes through the lead wire clamping groove in the radial direction and extends to the radial outer side of the upper framework,
the stator assembly of the motor further has:
a wire clamp which is clamped on the upper framework and covers the opening of the lead clamping groove,
when the wire clamp is clamped with the upper framework, the wire clamp divides the lead clamping groove into a first part and a second part in the radial direction, wherein the first part is opposite to the wire clamp and clamps the lead together with the wire clamp, and the second part is used for bending the lead,
the wire clamp has:
a covering portion including a first covering portion and a second covering portion in a circumferential direction, the first covering portion being located at least one end in the circumferential direction of the second covering portion;
a first leg portion extending axially downward from a radially outer end of the first cover portion; and
a second leg portion extending axially downward from a radially inner end of the first cover portion,
when the wire clamp is engaged with the upper frame, the first leg portion is engaged with a radially outer wall surface of the wall portion of the upper frame, and the second leg portion is attached to a radially inner wall surface of the wall portion of the upper frame.
2. The stator assembly of an electric machine of claim 1,
the wall portion of the upper frame has a frame lead fixing portion and a wall main body portion in a circumferential direction,
wherein a radial dimension of the bobbin lead fixing portion is larger than a radial dimension of the wall main body portion,
the lead clamping groove is formed in the framework lead fixing part.
3. The stator assembly of an electric machine of claim 2,
at least one side of the circumferential direction of the framework lead fixing part is provided with a wire clamp positioning surface which limits the position of the wire clamp in the circumferential direction of the wall part.
4. The stator assembly of an electric machine of claim 1,
the upper frame further has:
and the first wire clamp buckle is formed on the radial outer wall surface of the wall part and is clamped with the wire clamp to limit the axial displacement of the wire clamp.
5. The stator assembly of an electric machine of claim 1,
and a second wire clamp buckle is formed on the radial inner side surface of the first leg or the side wall facing the second covering part.
6. The stator assembly of an electric machine of claim 1,
the first covering portion has a larger radial dimension than the second covering portion.
7. The stator assembly of an electric machine of claim 1, wherein the wire clamp further comprises:
a lead pressing tooth extending downward in an axial direction from the second covering portion,
and under the condition that the wire clamp is clamped on the upper framework, the lead pressing teeth cover the opening of the lead clamping groove.
8. The stator assembly of an electric machine of claim 1,
the wall portion of the upper frame has a frame lead fixing portion and a wall main body portion in a circumferential direction,
at least one side of the circumferential direction of the framework lead fixing part is provided with a wire clamp positioning surface,
the side wall of the first leg part close to the second covering part is abutted to the wire clamp positioning surface.
9. The stator assembly of an electric machine of claim 1, further comprising:
a lower bobbin located axially below the upper bobbin for supporting the winding;
a stator core located between the upper frame and the lower frame in an axial direction; and
a plastic injection molding material portion for closing a gap of the winding.
10. A stator of an electrical machine, characterized in that the stator of the electrical machine has a stator housing, and a stator assembly of the electrical machine according to any one of claims 1-9, wherein the stator assembly of the electrical machine is mounted in the stator housing.
11. A method of manufacturing a stator assembly for an electric machine according to any of claims 1-9, characterized in that the manufacturing method comprises:
installing the upper framework and the winding into a whole, and guiding the lead from the lead clamping groove to the radial outer side of the upper framework; and
and clamping the wire clamp on the upper framework.
12. The manufacturing method according to claim 11, wherein in the case where the stator assembly of the motor further has a lower bobbin, a stator core, and an injection molded material portion,
the manufacturing method comprises the following steps:
installing the upper framework, the stator core, the lower framework and the winding into a whole, and guiding the lead wires from the lead wire clamping grooves to the radial outer side of the upper framework;
clamping the wire clamp on the upper framework; and
and injecting a high polymer material to form the injection molding material part.
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| CN201910531219.7A CN112117853B (en) | 2019-06-19 | 2019-06-19 | Stator assembly of motor, manufacturing method thereof and stator of motor |
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| CN201910531219.7A CN112117853B (en) | 2019-06-19 | 2019-06-19 | Stator assembly of motor, manufacturing method thereof and stator of motor |
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| CN112117853B true CN112117853B (en) | 2022-05-06 |
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