CN112165194A

CN112165194A - Motor stator fixing structure and forming method thereof

Info

Publication number: CN112165194A
Application number: CN202011079448.9A
Authority: CN
Inventors: 杜涛
Original assignee: Hexing Automotive Electronics Taicang Co ltd
Current assignee: Hexing Automotive Electronics Taicang Co ltd
Priority date: 2020-10-10
Filing date: 2020-10-10
Publication date: 2021-01-01

Abstract

The invention provides a motor stator fixing structure and a forming method thereof, belonging to the technical field of motor stators, wherein the motor stator fixing structure comprises: the insert is wrapped outside the stator core; a base housing integrally molded with the insert by injection molding, and a portion of the base housing extending to the insert and an inside of the stator core; according to the motor stator fixing structure, the stator core is fixed with the base shell in an injection molding mode, so that the reliable installation of the motor stator is ensured, the sealing requirement of the motor stator is ensured, and the dust prevention, the water prevention and the oil drainage of the motor stator are realized.

Description

Motor stator fixing structure and forming method thereof

Technical Field

The invention relates to the technical field of motor stators, in particular to a motor stator fixing structure and a forming method thereof.

Background

The motor stator is an important component of motors such as a generator, a starter and the like; the motor stator is the stationary part of the motor. The stator consists of three parts, namely a stator iron core, a stator winding and a machine base.

In the existing vehicle motor, a stator core and a stator base are assembled together through a buckle structure; however, during the use of the motor, the stator is subjected to the reaction force of the motor rotor, which can cause the failure of the assembled parts, so that the motor system generates a large gap, and the electromagnetic interaction function fails.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to overcome the defect that assembly parts of a stator fail due to the reaction force of a motor rotor on the stator in the using process of a motor in the prior art, so that a motor stator fixing structure is provided.

The invention also provides a forming method of the motor stator fixing structure.

The invention provides a motor stator fixing structure, comprising:

the insert is wrapped outside the stator core;

and a base housing integrally formed with the insert by injection molding, and a portion of the base housing extends to the insert and an inside of the stator core.

Preferably, the bottom of the insert has a support base for supporting the stator core.

Preferably, the support base has a first through hole adapted to allow the base housing to pass through during injection molding.

Preferably, the stator core has a positioning groove in an interior thereof opposite to the first through hole.

Preferably, the opening of the positioning groove faces the center direction of the stator core.

Preferably, the support table of the insert has a second through hole adapted to allow the base housing to pass through during injection molding, and a top end of the second through hole is closed by the stator core.

Preferably, the outer wall of the insert has a melting point which is lower than the melting point of the insert itself.

Preferably, the fusible point includes: the flange comprises an annular flange and a protruding column located in the center of the annular flange, wherein a gap is formed between the protruding column and the inner wall of the annular flange.

Preferably, the bottom wall of the insert is provided with a positioning platform extending towards the center.

Preferably, the side wall of the insert is provided with a hanging platform which extends outwards.

The invention also provides a forming method of the motor stator fixing structure, which comprises the following steps:

wrapping the insert outside the stator core;

the base housing is integrally formed with the insert by injection molding, and a portion of the base housing is extended to the insert and the inside of the stator core.

Preferably, the insert is wrapped outside the stator core in an injection molding mode.

The technical scheme of the invention has the following advantages:

1. the invention provides a motor stator fixing structure, comprising: the stator comprises an insert and a base shell, wherein the insert is wrapped outside a stator core, and the base shell is formed into a whole with the insert through injection molding; the stator core is fixed with the base shell in an injection molding mode, the motor stator is guaranteed to be reliably mounted, the sealing requirement of the motor stator is guaranteed, and dust prevention, water prevention and oil drainage of the motor stator are achieved.

2. According to the motor stator fixing structure provided by the invention, the bottom of the insert is provided with the support table, and the support table is used for supporting the stator core and preventing an injection molding agent from being injected onto the stator core during secondary injection molding.

3. The invention provides a motor stator fixing structure, wherein a support table is provided with a first through hole, and a positioning groove opposite to the first through hole is formed in a stator core; the fixing of inserts, stator core and base casing is convenient when moulding plastics.

4. According to the motor stator fixing structure provided by the invention, the support table of the insert is provided with the second through hole, so that when the base shell is subjected to injection molding, an injection molding agent is injected into the second through hole, and the bonding force between the insert and the base shell is increased; the rotor structure arranged in the middle of the insert is guaranteed not to be separated.

5. According to the motor stator fixing structure provided by the invention, the bottom of the insert is provided with a positioning platform extending towards the center direction; and positioning the insert when the base housing is injection molded.

6. According to the motor stator fixing structure provided by the invention, the hanging table extending outwards is arranged on the side wall of the insert, and when the base shell is subjected to injection molding, the hanging table is arranged, so that the fixing force of the insert and the base shell after injection molding is ensured, and the looseness is prevented; meanwhile, the positioning can be carried out in the injection molding process, the rotation of the insert in the injection molding process is prevented, and the misplacement of the insert is prevented.

7. According to the forming method of the motor stator fixing structure, the stator core and the base shell are fixed through injection molding on two sides, the fixing mode ensures the reliable installation of the stator core, the stator core can resist severe vibration environment, and the use temperature range is-40 ℃ to +150 ℃; and meanwhile, the dustproof, waterproof and oilproof requirements of the motor can be met.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic perspective view of a stator fixing structure of a motor according to the present invention.

Fig. 2 is a perspective view of the stator core shown in fig. 1.

Fig. 3 is a schematic view of a first angular perspective structure of the insert shown in fig. 1.

Fig. 4 is a second angular perspective view of the insert shown in fig. 1.

Fig. 5 is a partially enlarged view of a portion a shown in fig. 4.

Fig. 6 is a perspective view of the base housing shown in fig. 1.

Fig. 7 is a partially enlarged view of fig. 6 at B.

Description of reference numerals:

1. a stator core; 2. an insert; 3. a base housing; 4. a support table; 5. a first through hole; 6. a second pass-through aperture; 7. positioning the platform; 8. hanging a table; 9. a melting point is easy; 10. positioning a groove; 11. an annular flange; 12. a projecting post; 13. a positioning groove; 14. a hollow bore; 15. an annular recessed rim; 16. and a positioning column.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

The motor stator fixing structure provided by this embodiment, as shown in fig. 1, includes: the stator comprises an insert 2 wrapped outside a stator core 1 and a base shell 3 formed integrally with the insert 2 through injection molding; the stator core 1 is fixed with the base shell 3 in an injection molding mode, the reliability installation of the motor stator is guaranteed, the sealing requirement of the motor stator is guaranteed, and the dustproof, waterproof and oil drainage of the motor stator are achieved.

As shown in fig. 2, the stator core 1 is formed by riveting and stacking a plurality of layers of thin silicon steel sheets, a positioning groove 10 is disposed on the stator core 1, and an opening of the positioning groove 10 faces the center direction of the stator core 1.

As shown in fig. 3, the insert 2 is injection-molded outside the stator core 1, the bottom of the insert 2 has a support table 4, the support table 4 is used for supporting the stator core 1, and a first through hole 5 is provided on the support table 4, and the first through hole 5 is arranged opposite to a positioning groove 10 of the stator core 1; a second through hole 6 is further provided in the support table 4, the second through hole 6 being formed in a square shape, and the top end of the second through hole 6 being closed by the stator core 1.

As shown in fig. 4, a positioning platform 7 protruding toward the center is provided on the bottom wall of the insert 2; the positioning platform 7 is arranged in a circle along the bottom wall of the insert 2 and is in a closed shape; a hanging table 8 extending outwards is arranged on the side wall of the insert 2; the bottom of the outer wall of the insert 2 is provided with a plurality of easy melting points 9, and the melting point of each easy melting point 9 is lower than that of the inlay body;

as shown in fig. 5, the fusible point 9 has an annular flange 11 and a protruding column 12 located at the center of the annular flange 11, and the protruding column 12 has a gap with the inner wall of the annular flange 11.

As an alternative embodiment, the insert 2 may also be produced in one piece and snapped into the stator core 1.

For the shell base, the insert 2 obtained by injection molding on the stator core 1 is placed on a mold of the shell base, in the placing process, the positioning platform 7 and the mold of the shell base are used for positioning, the inlay is fixed on the mold of the shell base through the hanging platform 8, and meanwhile, the positioning is carried out again;

after the mold for the inlay and the housing base are fixed, injection molding is performed, and an injection molding agent is injected to obtain the base housing 3 shown in fig. 6.

In the injection molding process, the injection molding agent enters the second through hole 6, so that the binding force between the inlay and the base shell 3 is increased; since the positioning platform 7 is provided on the inlay, a positioning groove 13 is formed on the housing; be provided with relatively on inlay and stator core 1 and set up first passing hole 5 and constant head tank 10, the agent of moulding plastics enters into wherein, forms reference column 16 on base casing 3, and reference column 16 has realized the fixed of inlay, stator core 1 and casing base, simultaneously, because have the orientation on the constant head tank 10 the opening of 1 central direction of stator core, consequently be provided with the bulge on the support column, the lower extreme of bulge with the brace table 4 butt of inserts 2.

As shown in fig. 7, the provision of the fusible point 9 enables accurate positioning when the inlay is placed in the mould of the base shell 3; meanwhile, the melting point of the fusible point 9 is lower than that of the insert 2, and in the process of injection molding of the base shell 3, the fusible point 9 is melted to form an annular concave edge 15 and a hollow hole 14 of the base shell 3 corresponding to the insert 2; the fusible point 9 and the base shell 3 are fused together, so that the air tightness of the insert 2 and the base shell 3 is ensured; and the shape characteristics of the fusible point 9 are more beneficial to the processing and forming of the die, and the injection molding is stable.

Method of use and principles

Placing a stator core 1 into a mold of an inlay, and performing injection molding to obtain an insert 2, wherein the insert 2 is wrapped outside the stator core 1; and placing the insert 2 and the stator core 1 into a mold of the base shell 3, and performing injection molding to obtain the base shell 3.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. A motor stator fixing structure characterized by comprising:

the insert (2) is wrapped outside the stator core (1);

a base housing (3) formed integrally with the insert (2) by injection molding, and a portion of the base housing (3) extends to the inside of the insert (2) and the stator core (1).

2. The motor stator fixing structure according to claim 1, wherein the bottom of the insert (2) has a support table (4) that supports the stator core (1).

3. Motor stator fixing structure according to claim 2, characterized in that said support table (4) has a first through hole (5) suitable for the passage of said base housing (3) during the injection moulding.

4. The motor stator fixing structure according to claim 3, wherein the stator core (1) has a positioning groove (10) in the inside thereof opposite to the first passing hole (5).

5. The motor stator fixing structure according to claim 4, wherein the opening of the positioning groove (10) is directed toward the center of the stator core (1).

6. The electric machine stator fixing structure according to claim 2, characterized in that the support table (4) of the insert (2) has a second through hole (6) adapted to allow the base housing (3) to pass through during injection molding, and the top end of the second through hole (6) is closed by the stator core (1).

7. The electric machine stator fixing structure according to any one of claims 1-6, characterized in that the insert (2) has a melting point (9) on its outer wall, the melting point (9) being lower than the melting point of the insert (2) itself.

8. The motor stator fixing structure according to claim 7, wherein the fusible point (9) includes: the annular flange (11) and a protruding column (12) located in the center of the annular flange (11), wherein a gap is formed between the protruding column (12) and the inner wall of the annular flange (11).

9. The stator fixing structure of the motor according to claim 7, wherein the bottom wall of the insert (2) is provided with a positioning platform (7) protruding towards the center.

10. The stator fixing structure of the motor according to claim 7, wherein the side wall of the insert (2) is provided with a hanging platform (8) which extends outwards.

11. A forming method of a motor stator fixing structure is characterized by comprising the following steps:

wrapping the insert (2) outside the stator core (1);

the base shell (3) and the insert (2) are integrally formed through injection molding, and part of the base shell (3) extends to the insert (2) and the interior of the stator core (1).

12. The molding method of the stator fixing structure of the motor according to claim 11, wherein the insert (2) is wrapped outside the stator core (1) by injection molding.