CN222366132U - Motor housing and motor - Google Patents

Abstract

The utility model provides a motor housing and motor, the motor housing includes outer barrel and interior barrel, interior barrel coaxial is located in the urceolus, just the urceolus with interior barrel links to each other, the urceolus is the injection molding, interior barrel is metal magnetic conduction structure, the interior barrel with the urceolus is metal injection molding integrated into one piece structure. The motor housing provided by the disclosure can improve the processing efficiency.

Description

Motor shell and motor

Technical Field

The disclosure relates to the technical field of motors, and in particular relates to a motor housing and a motor.

Background

As life enters modernization, motors are seen everywhere in people's life. The motor generally includes a motor housing, and a rotor, a stator, etc. structure disposed within the motor housing. The motor housing not only serves a supporting function at the time of assembly, but also is a part of the magnetic circuit. That is, the motor case has not only strong corrosion resistance but also magnetic permeability and the like.

In the related art, a metal magnetic conductive material is preferred for the motor housing. In order to make the motor housing have strong corrosion resistance, it is necessary to perform anodic oxidation, sealing treatment, spraying process and the like on the outer surface of the metal magnetic conductive material. That is, the motor housing includes a metal magnetically permeable layer, an anodized layer attached to the metal magnetically permeable layer, a sealing layer filled in pores of the anodized layer, and a spray coating, etc. Wherein the capping layer is typically hydrated alumina. The spray coating is protective paint, etc.

However, the motor housing is obtained in the above manner, the process is complicated, and the processing efficiency is low.

Disclosure of utility model

The embodiment of the disclosure provides a motor shell and a motor, which can improve the manufacturing efficiency of the motor while improving the corrosion resistance of the motor shell. The technical scheme is as follows:

The embodiment of the disclosure provides a motor housing, the motor housing includes outer barrel and inner barrel, the inner barrel is coaxial to be located in the urceolus, just the urceolus with the inner barrel links to each other, the urceolus is the injection molding, the inner barrel is metal magnetic conduction structure, the inner barrel with the urceolus is metal injection molding integrated into one piece structure.

In still another implementation manner of the present disclosure, the outer cylinder body includes a cylindrical shell and at least two arc-shaped connection pieces, one end of the cylindrical shell is provided with an opening, the at least two arc-shaped connection pieces are circumferentially distributed inside the cylindrical shell with a central axis of the cylindrical shell as an axis interval, one end of each arc-shaped connection piece is connected with one end of the cylindrical shell on the central axis of the cylindrical shell, the other end of each arc-shaped connection piece faces the opening, an annular gap is formed between the arc-shaped connection piece and an inner wall of the cylindrical shell, and one end of the inner cylinder body is embedded in the annular gap.

In still another implementation manner of the present disclosure, the arc-shaped connecting piece is of a T-shaped structure, the arc-shaped connecting piece includes a connecting portion and an extending portion that are connected to each other, the connecting portion and the extending portion are arranged along a radial direction of the cylindrical housing, the connecting portion is connected to an inner wall of the cylindrical housing, two ends of the extending portion respectively protrude outside the connecting portion along a circumferential direction of the cylindrical housing, and a limit space for accommodating the magnetic shoe is formed between a structure of the extending portion protruding outside the connecting portion and the inner wall of the cylindrical housing.

In yet another implementation of the present disclosure, an inner wall of the cylindrical housing near an end of the opening has a limiting inner flange, and an end of the inner cylinder facing the opening abuts against the limiting inner flange.

In yet another implementation of the present disclosure, the outer cylinder further includes a connection flange, and the connection flange is sleeved outside one end of the cylindrical housing near the opening and is connected to an outer wall of the cylindrical housing.

In yet another implementation manner of the present disclosure, the connection flange has a plurality of connection holes, the plurality of connection holes are circumferentially distributed with a central axis of the cylindrical shell as an axis interval, and metal connection sleeves are embedded in the connection holes.

In a further implementation manner of the present disclosure, a plurality of positioning groove groups are provided on an end surface of the connecting flange, which is far away from the arc-shaped connecting piece, and each positioning groove group is provided with a plurality of positioning grooves, the plurality of positioning groove groups are arranged in one-to-one correspondence with the plurality of connecting holes, and the plurality of positioning grooves in each positioning groove group are circumferentially distributed around the corresponding connecting hole at the periphery of the connecting hole.

In a further implementation manner of the present disclosure, the outer cylinder body further includes a rotor positioning ring and a plurality of connection ribs, the rotor positioning ring is located in the cylindrical housing and located in the plurality of arc-shaped connection pieces, the plurality of connection ribs are located in the cylindrical housing, the connection ribs extend along the radial direction of the rotor positioning ring, one end of each connection rib is connected with the rotor positioning ring, and the other end of each connection rib is connected with the cylindrical housing.

In yet another implementation of the present disclosure, the inner cylinder is a soft magnetic structure and the outer cylinder is a polyamide structure.

In still another implementation manner of the present disclosure, a motor is further provided, where the motor includes a motor housing, a motor end cover, and a stator and rotor assembly, where the motor end cover is located at an opening of the motor housing and connected to the motor housing, and where the stator and rotor assembly is located in the motor housing and connected to the motor housing, and where the motor housing is described above.

The technical scheme provided by the embodiment of the disclosure has the beneficial effects that:

Because the motor shell provided by the embodiment of the disclosure comprises the outer cylinder body and the inner cylinder body, the inner cylinder body and the outer cylinder body are integrally formed structural members through metal injection molding, the outer cylinder body and the inner cylinder body can be integrally processed, and the processing efficiency is improved. Moreover, as the outer cylinder body is an injection molding piece, the inner cylinder body is a metal magnetic conduction structural member, so that the motor shell has strong corrosion resistance through the outer cylinder body of the injection molding structure, and meanwhile, the motor shell can conduct magnetic conduction through the inner cylinder body of the metal magnetic conduction structure. That is, the above motor housing not only has corrosion resistance, but also has magnetic permeability, and the motor housing can be integrally processed, thereby greatly improving the processing efficiency.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.

FIG. 1 is a right side view of a motor housing provided by an embodiment of the present disclosure;

FIG. 2 is a cross-sectional view taken along the line A-A in FIG. 1;

Fig. 3 is a left side view of a motor housing provided by an embodiment of the present disclosure.

The symbols in the drawings are as follows:

1. the device comprises an outer cylinder, a cylindrical shell, 12, an arc-shaped connecting sheet, 121, a connecting part, 122, an extending part, 10, an annular gap, 110, an opening, 1100, a positioning spigot, 111, a limiting inner flange, 13, a connecting flange, 130, a connecting hole, 1300, a positioning groove, 131, a metal connecting sleeve, 14, a rotor positioning ring and 15, a connecting rib;

2. And 20, an inner cylinder body and a limit space.

Detailed Description

For the purposes of clarity, technical solutions and advantages of the present disclosure, the following further details the embodiments of the present disclosure with reference to the accompanying drawings.

The embodiment of the disclosure provides a motor housing, as shown in fig. 1, the motor housing includes an outer cylinder 1 and an inner cylinder 2, the inner cylinder 2 is coaxially located in the outer cylinder 1, and the outer cylinder 1 is connected with the inner cylinder 2, the outer cylinder 1 is an injection molding piece, the inner cylinder 2 is a metal magnetic conduction structural member, and the inner cylinder 2 and the outer cylinder 1 are metal injection molding integrated structural members.

Because the motor housing provided by the embodiment of the disclosure comprises the outer cylinder body 1 and the inner cylinder body 2, the inner cylinder body 2 and the outer cylinder body 1 are integrally formed structural members through metal injection molding, and thus the outer cylinder body 1 and the inner cylinder body 2 can be integrally processed, and the processing efficiency is improved. Moreover, as the outer cylinder body 1 is an injection molding part, the inner cylinder body 2 is a metal magnetic conduction structural part, the motor shell has strong corrosion resistance through the outer cylinder body 1 of the injection molding structure, and meanwhile, the motor shell can be magnetically conducted through the inner cylinder body 2 of the metal magnetic conduction structure. That is, the motor housing not only has corrosion resistance, but also has magnetism conductivity, and the motor housing can be integrally processed, so that the processing technology is simplified, and the processing efficiency is greatly improved. In addition, as the processing procedure is short, the quality influence factors of the motor shell are relatively few, and the yield of the motor shell can be indirectly improved.

The above-mentioned metal insert injection molding integral molding structural member means that the inner cylinder 2 of the metal structural member is placed in the corresponding position in the mold in advance when the outer cylinder 1 is injection molded, and then the outer cylinder 1 is injection molded. The injection molding piece obtained after the mold opening is the metal insert injection molding integrated structural piece formed by the inner cylinder body 2 and the outer cylinder body 1.

Fig. 2 is a cross-sectional view taken along A-A in fig. 1, and in combination with fig. 2, the outer cartridge 1 optionally includes a cylindrical housing 11 and at least two arcuate tabs 12. One end of the cylindrical shell 11 is provided with an opening 110, at least two arc-shaped connecting pieces 12 are circumferentially distributed in the cylindrical shell 11 with the central axis of the cylindrical shell 11 as an axial interval, one end of each arc-shaped connecting piece 12 is connected with one end of the cylindrical shell 11 on the central axis of the cylindrical shell 11, the other end of each arc-shaped connecting piece 12 faces the opening 110, and an annular gap 10 is formed between each arc-shaped connecting piece 12 and the inner wall of the cylindrical shell 11. One end of the inner cylinder 2 is embedded in the annular gap 10.

In the above-described implementation, the annular gap 10 may be simply formed between the arcuate connecting piece 12 and the cylindrical housing 11. Moreover, the arcuate tabs 12 are spaced apart to allow a magnetic shoe to be received between two adjacent arcuate tabs 12.

The annular gap 10 can limit the inner cylinder 2 within the outer cylinder 1 so that the two can be firmly assembled together without separation.

Of course, the limiting mode of the annular gap 10 can be replaced by other structural modes, for example, the inner cylinder 2 is provided with a structure with a plurality of limiting protrusions on the outer wall. In injection molding, the limit projection can be inserted into the outer wall of the outer cylinder 1 after injection molding, and the like. Only the inner cylinder body 2 is provided with a limiting bulge structure, so that the manufacturing cost of the inner cylinder body 2 is increased, and the requirement on a die during molding is high. That is, the present disclosure is not limited to this limitation as long as the inner cylinder 2 and the outer cylinder 1 can be firmly connected together.

That is, the above structure can simply form the annular gap 10 so that the inner cylinder 2 can be firmly located between the cylindrical housing 11 and the arc-shaped connecting piece 12, and can also provide an installation space for the magnetic shoe.

In other examples, the structure of the above outer cylinder 1 may be other forms, such as a double-layer cylinder, an annular gap 10 formed between double-layer cylinders, and the like. Only the structure of the outer cylinder 1 is complex, and the corresponding requirements of the process, the grinding tool and the like during molding are high, so that the processing efficiency is affected.

In this embodiment, there are two arc-shaped connection pieces 12, and the two arc-shaped connection pieces 12 are arranged axisymmetrically with respect to the axis of the cylindrical housing 11. Two spaces for mounting the magnetic shoes can thus be formed by the two arcuate connecting pieces 12.

Referring to fig. 1 and 2, alternatively, the arc-shaped connection piece 12 is of a T-shaped structure, the arc-shaped connection piece 12 includes a connection portion 121 and an extension portion 122 connected to each other, the connection portion 121 and the extension portion 122 are arranged along a radial direction of the cylindrical housing 11, and the connection portion 121 is connected to an inner wall of the cylindrical housing 11.

Along the circumferential direction of the cylindrical housing 11, two ends of the extension portion 122 respectively protrude outside the connection portion 121, and a spacing space 20 for accommodating the magnetic shoe is formed between the structure of the extension portion 122 protruding outside the connection portion 121 and the inner wall of the cylindrical housing 11.

In the above-described implementation, the spacing space 20 is used for fitting and positioning the magnetic shoe so that the magnetic shoe can be fitted between the adjacent two arc-shaped connection pieces 12.

Optionally, the inner wall of the cylindrical shell 11 near one end of the opening 110 is provided with a limiting inner flange 111, and one end of the inner cylinder 2 facing the opening 110 abuts against the limiting inner flange 111.

In the above implementation, the limiting inner flange 111 is used to limit the inner cylinder 2 in the outer cylinder 1, and further process the connection strength between the inner cylinder 2 and the outer cylinder 1.

In other examples, the limiting inner flange 111 may be other limiting structures, such as the above-mentioned limiting protrusions formed on the outer wall of the inner cylinder 2 during the metal injection molding, the limiting protrusions inserted into the outer wall of the outer cylinder 1, and so on.

Optionally, the outer cylinder 1 further comprises a connecting flange 13, and the connecting flange 13 is sleeved outside one end of the cylindrical shell 11 near the opening 110 and is connected with the outer wall of the cylindrical shell 11.

In the above described implementation, the connection flange 13 is used for connection with other components of the motor, such as the motor end cap or the like.

Optionally, the connecting flange 13 is provided with a plurality of connecting holes 130, the plurality of connecting holes 130 are circumferentially distributed with the central axis of the cylindrical shell 11 as an axis, and the connecting holes 130 are embedded with metal connecting sleeves 131.

Since the connection flange 13 is part of the outer cylinder 1, the connection flange 13 is also an injection-molded part. In order to prevent the connection flange 13 from being damaged when being connected with other components, the metal connecting sleeve 131 is embedded in the connection hole 130, so that the strength of the connection flange 13 can be further improved through the metal connecting sleeve 131, and the damage and the like are prevented.

Illustratively, the number of the connection holes 130 is three, and the connection lines of the three connection holes 130 form a triangle. Thus, the motor shell can be uniformly stressed in the circumferential direction.

In this embodiment, in order to facilitate quick assembly between the connection flange 13 and other components, a plurality of positioning groove sets are disposed on an end surface of the connection flange 13 away from the inner cylinder 2, and each positioning groove set has a plurality of positioning grooves 1300 therein. The positioning groove groups are arranged in a one-to-one correspondence with the connecting holes 130, and in each positioning groove group, the positioning grooves are distributed around the corresponding connecting holes 130. The positioning groove can be a strip-shaped groove and the like.

The inside of the end of the cylindrical housing 11 remote from the arc-shaped connecting piece 12 has a positioning spigot 1100, and the positioning spigot 1100 is used for positioning when other components are assembled.

Optionally, the outer cylinder 1 further includes a rotor positioning ring 14 and a plurality of connecting ribs 15, wherein the rotor positioning ring 14 is located in the cylindrical housing 11 and is located in the plurality of arc-shaped connecting pieces 12.

A plurality of connection ribs 15 are located in the cylindrical housing 11, the connection ribs 15 extend in the radial direction of the rotor positioning ring 14, one end of the connection ribs 15 is connected with the rotor positioning ring 14, and the other end is connected with the cylindrical housing 11.

In the above described implementation, the rotor positioning ring 14 is used to assemble the rotor so that the rotor in the motor can be quickly connected in the motor housing.

The connecting rib 15 can further increase the structural strength of the outer cylinder 1, and can further connect the rotor positioning ring 14 to the cylindrical housing 11.

In other examples, the rotor positioning ring 14 may be of other configurations, such as a cylindrical configuration, etc.

Optionally, the inner cylinder 2 is a soft magnetic structural member, and the outer cylinder 1 is a polyamide 66 (nylon 6, also called PA 6) structural member.

The inner cylinder 2 is provided as a soft magnetic structure, so that the inside of the motor housing can have magnetic permeability. The outer cylinder 1 is arranged to be a polyamide 6 structural member, so that the motor shell can be conveniently molded and has high corrosion resistance.

The soft magnetic structural member can be a No. 45 steel structural member.

Fig. 3 is a left side view of a motor housing provided in an embodiment of the present disclosure, that is, fig. 3 is a left side view in fig. 2, and in combination with fig. 3, one end of the outer cylinder 1, which is far away from the opening 110, is in a closed state, and one end of the outer cylinder 1, which is far away from the opening 110, is in a necking structure, and an outer diameter of one end of the outer cylinder 1, which is far away from the opening 110, is smaller than an outer diameter of a middle part of the outer cylinder 1. Therefore, the outer cylinder body 1 has a small structure, occupies less space and can reduce weight.

The following briefly describes the manufacturing and working processes of the motor housing provided in the embodiments of the present disclosure:

When the motor shell is manufactured, the inner cylinder body 2 can be embedded in a proper position of a die, and then the outer cylinder body 1 is injection molded, so that the embedded inner cylinder body 2 after die opening is tightly embedded in the outer cylinder body 1 of the injection molding structural part by cooled and solidified plastic. The inner cylinder 2 is located in the outer cylinder 1. Therefore, the inner cylinder body 2 can be firmly connected in the outer cylinder body 1, and meanwhile, the inner cylinder body 2 can be connected in the outer cylinder body 1 during injection molding of the outer cylinder body 1, so that the processing steps are simplified, and the processing efficiency is improved.

On the other hand, the embodiment of the disclosure also provides a motor, which comprises a motor shell, a motor end cover and a stator and rotor assembly, wherein the motor end cover is positioned at the opening of the motor shell and is connected with the motor shell, the stator and rotor assembly is positioned in the motor shell and is connected with the motor shell, and the motor shell is the motor shell.

The motor has the same beneficial effects as the motor shell, and the description is omitted here.

The foregoing is merely an alternative embodiment of the present disclosure, and is not intended to limit the present disclosure, any modification, equivalent replacement, improvement, etc. that comes within the spirit and principles of the present disclosure are included in the scope of the present disclosure.

Claims (10)

1. The motor shell is characterized by comprising an outer shell body (1) and an inner shell body (2), wherein the inner shell body (2) is coaxially arranged in the outer shell body (1), the outer shell body (1) is connected with the inner shell body (2), the outer shell body (1) is an injection molding piece, the inner shell body (2) is a metal magnetic conduction structural member, and the inner shell body (2) and the outer shell body (1) are metal insert injection molding integrated structural members.

2. The motor housing according to claim 1, characterized in that the outer cylinder (1) comprises a cylindrical shell (11) and at least two arcuate connecting pieces (12),

One end of the cylindrical shell (11) is provided with an opening (110), the at least two arc-shaped connecting pieces (12) are circumferentially distributed in the cylindrical shell (11) by taking the central axis of the cylindrical shell (11) as an axis interval, one end of each arc-shaped connecting piece (12) is connected with one end of the cylindrical shell (11) on the central axis of the cylindrical shell (11), the other end of each arc-shaped connecting piece (12) faces the opening (110), and an annular gap (10) is formed between the arc-shaped connecting piece (12) and the inner wall of the cylindrical shell (11);

one end of the inner cylinder (2) is embedded in the annular gap (10).

3. The motor housing according to claim 2, wherein the arc-shaped connection piece (12) is of a T-shaped structure, the arc-shaped connection piece (12) including a connection portion (121) and an extension portion (122) connected to each other, the connection portion (121) and the extension portion (122) being arranged along a radial direction of the cylindrical housing (11), the connection portion (121) being connected to an inner wall of the cylindrical housing (11);

Along the circumference of the cylindrical shell (11), two ends of the extension part (122) respectively protrude out of the connecting part (121), and a limit space (20) for accommodating the magnetic shoe is formed between a structure of the extension part (122) protruding out of the connecting part (121) and the inner wall of the cylindrical shell (11).

4. The motor housing according to claim 2, characterized in that an inner wall of the cylindrical shell (11) near one end of the opening (110) is provided with a limit inner flange (111), and one end of the inner cylinder (2) facing the opening (110) is abutted against the limit inner flange (111).

5. The motor housing according to claim 2, wherein the outer cylinder (1) further comprises a connecting flange (13), and the connecting flange (13) is sleeved outside one end of the cylindrical housing (11) close to the opening (110) and is connected with the outer wall of the cylindrical housing (11).

6. The motor housing according to claim 5, wherein the connecting flange (13) is provided with a plurality of connecting holes (130), the plurality of connecting holes (130) are circumferentially distributed with a central axis of the cylindrical shell (11) as an axis, and a metal connecting sleeve (131) is embedded in the connecting holes (130).

7. The motor housing according to claim 6, characterized in that an end face of the connecting flange (13) remote from the arcuate connecting piece (12) is provided with a plurality of positioning groove groups, each comprising a plurality of positioning grooves (1300);

The positioning groove groups are arranged in one-to-one correspondence with the connecting holes (130), and the positioning grooves in each positioning groove group are circumferentially distributed on the periphery of the connecting hole (130) around the corresponding connecting hole (130).

8. The motor housing according to claim 2, wherein the outer cylinder (1) further comprises a rotor positioning ring (14) and a plurality of connection ribs (15), the rotor positioning ring (14) being located within the cylindrical shell (11) and inside the plurality of arcuate connection tabs (12);

The plurality of connecting ribs (15) are located in the cylindrical shell (11), the connecting ribs (15) extend along the radial direction of the rotor positioning ring (14), one end of each connecting rib (15) is connected with the rotor positioning ring (14), and the other end of each connecting rib is connected with the cylindrical shell (11).

9. The motor housing according to any one of claims 1 to 8, wherein the inner cylinder (2) is a soft magnetic structure and the outer cylinder (1) is a polyamide structure.

10. A motor, characterized in that, the motor includes motor casing, motor end cover and stator rotor subassembly, the motor end cover is located motor casing's opening part, and with motor casing links to each other, stator rotor subassembly is located motor casing is internal, and with motor casing links to each other, motor casing is the motor casing of any one of claims 1 to 9.