Motor shell and motor

Abstract

The utility model provides a motor shell and a motor, the motor shell comprises an outer cylinder body and an inner cylinder body, the inner cylinder body is coaxially located in the outer cylinder body, the outer cylinder body is connected with the inner cylinder body, the outer cylinder body is an injection molding part, the inner cylinder body is a metal magnetic conduction structural part, and the inner cylinder body is a metal magnetic conduction structural part. And the inner cylinder body and the outer cylinder body are structural parts integrally formed by metal injection molding. According to the motor shell provided by the invention, the processing efficiency can be improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of motors, and in particular to a motor housing and a motor. Background Art

[0002] As life enters modernization, motors can be seen everywhere in people's lives. Motors generally include motor housings and structures such as rotors and stators located inside the motor housings. The motor housing not only plays a supporting role during assembly, but is also part of the magnetic circuit. In other words, the motor housing not only has strong corrosion resistance, but also has magnetic conductivity.

[0003] In the related art, the motor housing is preferably made of metal magnetic conductive material. In order to make the motor housing have strong corrosion resistance, it is necessary to perform anodizing, sealing and spraying processes on the outer surface of the metal magnetic conductive material. In other words, the motor housing includes a metal magnetic conductive layer, an anodized layer attached to the metal magnetic conductive layer, a sealing layer filled in the pores of the anodized layer, and a sprayed layer, etc. Among them, the sealing layer is generally hydrated aluminum oxide. The sprayed layer is a protective paint, etc.

[0004] However, the process of obtaining the motor housing in the above manner is complicated and the processing efficiency is low. Utility Model Content

[0005] The embodiment of the present disclosure provides a motor housing and a motor, which can improve the corrosion resistance of the motor housing and improve the manufacturing efficiency of the motor. The technical solution is as follows:

[0006] An embodiment of the present disclosure provides a motor housing, which includes an outer cylinder and an inner cylinder, wherein the inner cylinder is coaxially located inside the outer cylinder and connected to the inner cylinder, the outer cylinder is an injection molded part, the inner cylinder is a metal magnetic conductive structural part, and the inner cylinder and the outer cylinder are metal injection molded integral structural parts.

[0007] In another implementation of the present disclosure, the outer cylinder includes a cylindrical outer shell and at least two arc-shaped connecting pieces, one end of the cylindrical outer shell has an opening, and the at least two arc-shaped connecting pieces are circumferentially distributed inside the cylindrical outer shell with the central axis of the cylindrical outer shell as the axis and spaced apart, and on the central axis of the cylindrical outer shell, one end of each of the arc-shaped connecting pieces is connected to one end of the cylindrical outer shell, and the other end of the arc-shaped connecting piece faces the opening, and an annular gap is formed between the arc-shaped connecting piece and the inner wall of the cylindrical outer shell; one end of the inner cylinder is embedded in the annular gap.

[0008] In another implementation of the present disclosure, the arc-shaped connecting piece is a T-shaped structure, and the arc-shaped connecting piece includes a connecting portion and an extending portion that are connected to each other, and the connecting portion and the extending portion are arranged along the radial direction of the cylindrical shell, and the connecting portion is connected to the inner wall of the cylindrical shell, and along the circumference of the cylindrical shell, the two ends of the extending portion respectively protrude outside the connecting portion, and a limiting space for accommodating the magnetic tile is formed between the structure in which the extending portion protrudes outside the connecting portion and the inner wall of the cylindrical shell.

[0009] In another implementation of the present disclosure, an inner wall of the cylindrical outer shell at one end close to the opening has a limiting inner flange, and an end of the inner cylinder body facing the opening abuts against the limiting inner flange.

[0010] In another implementation of the present disclosure, the outer cylinder further includes a connecting flange, which is sleeved outside an end of the cylindrical shell close to the opening and connected to an outer wall of the cylindrical shell.

[0011] In another implementation of the present disclosure, the connecting flange has a plurality of connecting holes, the plurality of connecting holes are circumferentially distributed with the central axis of the cylindrical shell as an axis, and metal connecting sleeves are embedded in the connecting holes.

[0012] In another implementation of the present disclosure, a plurality of positioning groove groups are provided on an end surface of the connecting flange away from the arc-shaped connecting plate, and each of the positioning groove groups has a plurality of positioning grooves; the plurality of positioning groove groups are arranged one-to-one correspondingly to the plurality of connecting holes, and the plurality of positioning grooves in each positioning groove group are circumferentially distributed around the corresponding connecting hole on the periphery of the connecting hole.

[0013] In another implementation of the present disclosure, the outer cylinder also includes a rotor positioning ring and a plurality of connecting ribs, wherein the rotor positioning ring is located inside the cylindrical outer shell and inside the plurality of arc-shaped connecting pieces; the plurality of connecting ribs are located inside the cylindrical outer shell, the connecting ribs extend along the radial direction of the rotor positioning ring, one end of the connecting rib is connected to the rotor positioning ring, and the other end is connected to the cylindrical outer shell.

[0014] In another implementation of the present disclosure, the inner cylinder is a soft magnetic structural component, and the outer cylinder is a polyamide structural component.

[0015] In another implementation of the present disclosure, a motor is further provided, comprising a motor housing, a motor end cover, and a stator-rotor assembly, wherein the motor end cover is located at an opening of the motor housing and is connected to the motor housing, and the stator-rotor assembly is located within the motor housing and is connected to the motor housing, and the motor housing is the motor housing described above.

[0016] The technical solution provided by the embodiments of the present disclosure has the following beneficial effects:

[0017] Since the motor housing provided by the embodiment of the present disclosure includes an outer cylinder and an inner cylinder, the inner cylinder and the outer cylinder are metal injection molded integral structural parts, so that the outer cylinder and the inner cylinder can be processed as one piece, thereby improving the processing efficiency. In addition, since the outer cylinder is an injection molded part and the inner cylinder is a metal magnetic conductive structural part, the motor housing can have strong corrosion resistance through the injection molded structure of the outer cylinder, and at the same time, the motor housing can be magnetic through the metal magnetic conductive structure of the inner cylinder. In other words, the above motor housing is not only corrosion-resistant, but also has magnetic conductivity, and the motor housing can be processed as one piece, which greatly improves the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A right side view of a motor housing provided in an embodiment of the present disclosure;

[0020] Figure 2 for Figure 1 The cross-sectional view along the AA direction;

[0021] Figure 3 A left side view of a motor housing provided in accordance with an embodiment of the present disclosure.

[0022] The symbols in the figure mean the following:

[0023] 1. outer cylinder; 11. cylindrical shell; 12. arc-shaped connecting piece; 121. connecting part; 122. extension part; 10. annular gap; 110. opening; 1100. positioning stop; 111. limiting inner flange; 13. connecting flange; 130. connecting hole; 1300. positioning groove; 131. metal connecting sleeve; 14. rotor positioning ring; 15. connecting rib;

[0024] 2. Inner cylinder; 20. Limit space. DETAILED DESCRIPTION

[0025] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0026] The present disclosure provides a motor housing, such as Figure 1As shown, 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 to the inner cylinder 2, the outer cylinder 1 is an injection molded part, the inner cylinder 2 is a metal magnetic conductive structural part, and the inner cylinder 2 and the outer cylinder 1 are metal injection molded integral structural parts.

[0027] Since the motor housing provided by the embodiment of the present disclosure includes an outer cylinder 1 and an inner cylinder 2, the inner cylinder 2 and the outer cylinder 1 are metal injection molded integral structural parts, so the outer cylinder 1 and the inner cylinder 2 can be processed as one piece, thereby improving the processing efficiency. In addition, since the outer cylinder 1 is an injection molded part and the inner cylinder 2 is a metal magnetic conductive structural part, the motor housing can have strong corrosion resistance through the injection molded structure of the outer cylinder 1, and at the same time, the motor housing can be magnetic through the metal magnetic conductive structure of the inner cylinder 2. In other words, the above motor housing is not only corrosion-resistant, but also has magnetic conductivity, and the motor housing can be processed as one piece, which simplifies the processing technology and greatly improves the processing efficiency. In addition, since the processing steps are short, the quality influencing factors of the motor housing are relatively few, which can also indirectly improve the yield of the motor housing.

[0028] The metal insert injection-molded integrally formed structural component mentioned above means that when the outer cylinder 1 is injection-molded, the inner cylinder 2 of the metal structural component is placed in the corresponding position in the mold in advance, and then the outer cylinder 1 is injection-molded. The injection-molded component obtained after the mold is opened is the metal insert injection-molded integrally formed structural component formed by the inner cylinder 2 and the outer cylinder 1.

[0029] Figure 2 for Figure 1 The cross-sectional view along the AA direction, combined with Figure 2 Optionally, the outer cylinder 1 includes a cylindrical shell 11 and at least two arc-shaped connecting pieces 12. One end of the cylindrical shell 11 has an opening 110, and at least two arc-shaped connecting pieces 12 are circumferentially distributed inside the cylindrical shell 11 with the central axis of the cylindrical shell 11 as the axis. On the central axis of the cylindrical shell 11, one end of each arc-shaped connecting piece 12 is connected to one end of the cylindrical shell 11, and the other end of the 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.

[0030] In the above implementation, an annular gap 10 can be simply formed between the arc-shaped connecting piece 12 and the cylindrical housing 11. Moreover, the arc-shaped connecting pieces 12 are arranged at intervals so that one magnetic tile can be accommodated between two adjacent arc-shaped connecting pieces 12.

[0031] The annular gap 10 can limit the inner cylinder 2 in the outer cylinder 1 so that the two can be firmly assembled together without separation.

[0032] Of course, the limiting method of the annular gap 10 can also be replaced by other structural forms, for example, the inner cylinder 2 is set to have a structure with a plurality of limiting protrusions on its outer wall. During injection molding, the limiting protrusions can be inserted into the outer wall of the outer cylinder 1 after injection molding, etc. It is just that the inner cylinder 2 is set to have a structure with limiting protrusions, which increases the manufacturing cost of the inner cylinder 2 and also makes the requirements for the mold during molding higher. In other words, as long as the inner cylinder 2 and the outer cylinder 1 can be firmly connected together, the present disclosure does not limit this limiting method.

[0033] That is to say, the above structure can not only simply form the annular gap 10 so that the inner cylinder 2 can be firmly located between the cylindrical outer shell 11 and the arc-shaped connecting piece 12, but also provide installation space for the magnetic tile.

[0034] In other examples, the structure of the outer cylinder 1 can also be formed in other forms, such as a double-layer cylinder, with an annular gap 10 formed between the double-layer cylinders, etc. However, the structure of the outer cylinder 1 is relatively complex, and the corresponding process, mold, etc. during molding are also required to be relatively high, thereby affecting the processing efficiency.

[0035] In this embodiment, there are two arc-shaped connecting pieces 12, and the two arc-shaped connecting pieces 12 are arranged symmetrically with the axis of the cylindrical housing 11. In this way, two spaces for installing magnetic tiles can be formed by the two arc-shaped connecting pieces 12.

[0036] Combination Figure 1 and Figure 2 Optionally, the arc-shaped connecting piece 12 is a T-shaped structure, and the arc-shaped connecting piece 12 includes a connecting portion 121 and an extending portion 122 that are connected to each other. The connecting portion 121 and the extending portion 122 are arranged along the radial direction of the cylindrical shell 11, and the connecting portion 121 is connected to the inner wall of the cylindrical shell 11.

[0037] Along the circumference of the cylindrical shell 11 , both ends of the extension portion 122 protrude outside the connecting portion 121 respectively, and a limiting space 20 for accommodating the magnetic tile is formed between the structure of the extension portion 122 protruding outside the connecting portion 121 and the inner wall of the cylindrical shell 11 .

[0038] In the above implementation, the limiting space 20 is used to assemble the positioning magnetic tile, so that the magnetic tile can be assembled between two adjacent arc-shaped connecting pieces 12.

[0039] Optionally, an inner wall of one end of the cylindrical outer shell 11 close to the opening 110 has a limiting inner flange 111 , and one end of the inner cylinder 2 facing the opening 110 abuts against the limiting inner flange 111 .

[0040] In the above implementation, the limiting inner flange 111 is used to limit the inner cylinder 2 in the outer cylinder 1 to further improve the connection strength between the inner cylinder 2 and the outer cylinder 1 .

[0041] In other examples, the limiting inner flange 111 may also be other limiting structures. For example, as mentioned above, during metal injection molding, a plurality of limiting protrusions are formed on the outer wall of the inner cylinder 2, and the limiting protrusions are inserted into the outer wall of the outer cylinder 1, etc.

[0042] Optionally, the outer cylinder 1 further includes a connecting flange 13 , which is sleeved outside an end of the cylindrical outer shell 11 close to the opening 110 and connected to an outer wall of the cylindrical outer shell 11 .

[0043] In the above implementation, the connecting flange 13 is used to connect with other components of the motor (such as the motor end cover, etc.).

[0044] Optionally, the connecting flange 13 has a plurality of connecting holes 130 , which are circumferentially distributed with the central axis of the cylindrical shell 11 as an axis, and a metal connecting sleeve 131 is embedded in the connecting hole 130 .

[0045] Since the connecting flange 13 is a part of the outer cylinder 1, the connecting flange 13 is also an injection molded part. In order to prevent the connecting flange 13 from being damaged when connected with other parts, a metal connecting sleeve 131 is embedded in the connecting hole 130, so that the strength of the connecting flange 13 can be further improved by the metal connecting sleeve 131 to prevent it from being damaged.

[0046] Exemplarily, there are three connecting holes 130, and the connecting line of the three connecting holes 130 forms a triangle, so that the motor housing can be uniformly stressed in the circumferential direction.

[0047] In this embodiment, in order to facilitate the rapid assembly between the connecting flange 13 and other components, a plurality of positioning groove groups are provided on one end surface of the connecting flange 13 away from the inner cylinder 2, and each positioning groove group has a plurality of positioning grooves 1300. The plurality of positioning groove groups are arranged in one-to-one correspondence with the plurality of connecting holes 130, and in each positioning groove group, the plurality of positioning grooves are distributed around the corresponding connecting holes 130. The positioning grooves may be strip grooves or the like.

[0048] A positioning stop 1100 is provided inside one end of the cylindrical housing 11 away from the arc-shaped connecting piece 12 , and the positioning stop 1100 is used for positioning when assembling other components.

[0049] Optionally, the outer cylinder 1 further includes a rotor positioning ring 14 and a plurality of connecting ribs 15 . The rotor positioning ring 14 is located inside the cylindrical outer shell 11 and inside the plurality of arc-shaped connecting pieces 12 .

[0050] A plurality of connecting ribs 15 are located in the cylindrical housing 11 . The connecting ribs 15 extend along the radial direction of the rotor positioning ring 14 . One end of the connecting rib 15 is connected to the rotor positioning ring 14 , and the other end is connected to the cylindrical housing 11 .

[0051] In the above implementation, the rotor positioning ring 14 is used to assemble the rotor, so that the rotor in the motor can be quickly connected to the motor housing.

[0052] The connecting ribs 15 can, on one hand, further increase the structural strength of the outer cylinder 1 , and, on the other hand, can further connect the rotor positioning ring 14 to the cylindrical outer shell 11 .

[0053] In other examples, the rotor positioning ring 14 may also be other structures, such as a cylindrical structure.

[0054] Optionally, the inner cylinder 2 is a soft magnetic structural component, and the outer cylinder 1 is a polyamide 66 (nylon 6, also called PA6) structural component.

[0055] The inner cylinder 2 is set as a soft magnetic structural part, so that the inside of the motor housing has magnetic conductivity. The outer cylinder 1 is set as a polyamide 6 structural part, which not only facilitates molding, but also makes the motor housing have high corrosion resistance.

[0056] The soft magnetic structural parts mentioned above may be No. 45 steel structural parts.

[0057] Figure 3 The left side view of the motor housing provided by the embodiment of the present disclosure, that is, Figure 3 for Figure 2 The left view in Figure 3 The end of the outer cylinder 1 away from the opening 110 is in a closed state, and the end of the outer cylinder 1 away from the opening 110 is a constricted structure, and the outer diameter of the end of the outer cylinder 1 away from the opening 110 is smaller than the outer diameter of the middle part of the outer cylinder 1. In this way, the outer cylinder 1 can be compact, occupy less space, and also reduce weight.

[0058] The following is a brief introduction to the manufacturing and working process of the motor housing provided by the embodiment of the present disclosure:

[0059] When manufacturing the above motor housing, the inner cylinder 2 can be embedded in the appropriate position of the mold, and then the outer cylinder 1 is injection molded, so that the inner cylinder 2 embedded after the mold is opened will be tightly wrapped by the cooled and solidified plastic and buried in the outer cylinder 1 of the injection molded structural part. The inner cylinder 2 will be in the outer cylinder 1. In this way, not only can the inner cylinder 2 be firmly connected to the outer cylinder 1, but also the inner cylinder 2 can be connected to the outer cylinder 1 during the injection molding of the outer cylinder 1, simplifying the processing steps and improving the processing efficiency.

[0060] On the other hand, an embodiment of the present disclosure also provides a motor, which includes a motor housing, a motor end cover and a stator and rotor assembly. The motor end cover is located at the opening of the motor housing and is connected to the motor housing. The stator and rotor assembly is located in the motor housing and is connected to the motor housing. The motor housing is the motor housing mentioned above.

[0061] The above motor has the same beneficial effects as the aforementioned motor housing, which will not be described in detail here.

[0062] The above are only optional embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. A motor housing, characterized in that: The motor housing comprises an outer cylinder (1) and an inner cylinder (2); the inner cylinder (2) is coaxially located inside the outer cylinder (1), and the outer cylinder (1) is connected to the inner cylinder (2); the outer cylinder (1) is an injection molded part, the inner cylinder (2) is a metal magnetic conductive structural part, and the inner cylinder (2) and the outer cylinder (1) are metal insert injection molded integral structural parts.

2. The motor housing according to claim 1, characterized in that: The outer cylinder (1) comprises a cylindrical outer shell (11) and at least two arc-shaped connecting pieces (12). One end of the cylindrical outer shell (11) has an opening (110); the at least two arc-shaped connecting pieces (12) are circumferentially distributed inside the cylindrical outer shell (11) with the central axis of the cylindrical outer shell (11) as an axis, and each arc-shaped connecting piece (12) is connected to one end of the cylindrical outer shell (11) on the central axis of the cylindrical outer shell (11); the other end of the 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 outer shell (11); One end of the inner cylinder (2) is embedded in the annular gap (10).

3. The motor housing according to claim 2, characterized in that: The arc-shaped connecting piece (12) is a T-shaped structure, and comprises a connecting portion (121) and an extending portion (122) connected to each other, wherein the connecting portion (121) and the extending portion (122) are arranged along the radial direction of the cylindrical outer shell (11), and the connecting portion (121) is connected to the inner wall of the cylindrical outer shell (11); Along the circumference of the cylindrical outer shell (11), the two ends of the extension portion (122) respectively protrude outside the connecting portion (121), and a limiting space (20) for accommodating the magnetic tile is formed between the structure where the extension portion (122) protrudes outside the connecting portion (121) and the inner wall of the cylindrical outer shell (11).

4. The motor housing according to claim 2, characterized in that: The inner wall of one end of the cylindrical outer shell (11) close to the opening (110) has a limiting inner flange (111), and one end of the inner cylinder (2) facing the opening (110) abuts against the limiting inner flange (111).

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

6. The motor housing according to claim 5, characterized in that: The connecting flange (13) has 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 a metal connecting sleeve (131) is embedded in the connecting hole (130).

7. The motor housing according to claim 6, characterized in that: An end surface of the connecting flange (13) away from the arc-shaped connecting piece (12) is provided with a plurality of positioning groove groups, and each of the positioning groove groups includes a plurality of positioning grooves (1300); The plurality of positioning groove groups are arranged in one-to-one correspondence with the plurality of connecting holes (130), and the plurality of positioning grooves in each positioning groove group are circumferentially distributed around the corresponding connecting hole (130) on the periphery of the connecting hole (130).

8. The motor housing according to claim 2, characterized in that: The outer cylinder (1) further comprises a rotor positioning ring (14) and a plurality of connecting ribs (15); the rotor positioning ring (14) is located inside the cylindrical outer shell (11) and inside the plurality of arc-shaped connecting pieces (12); The plurality of connecting ribs (15) are located inside the cylindrical outer shell (11), the connecting ribs (15) extend along the radial direction of the rotor positioning ring (14), one end of the connecting rib (15) is connected to the rotor positioning ring (14), and the other end is connected to the cylindrical outer shell (11).

9. The motor housing according to any one of claims 1 to 8, characterized in that: The inner cylinder (2) is a soft magnetic structural component, and the outer cylinder (1) is a polyamide structural component.

10. A motor, characterized in that: The motor includes a motor housing, a motor end cover and a stator-rotor assembly. The motor end cover is located at the opening of the motor housing and connected to the motor housing. The stator-rotor assembly is located in the motor housing and connected to the motor housing. The motor housing is the motor housing according to any one of claims 1 to 9.

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