Framework structure and manufacturing method thereof

Abstract

The invention provides a framework structure and a manufacturing method thereof. The framework structure is used for being connected with a coil to serve as a stator of the motor. The skeleton structure is provided with a cavity penetrating in the axial direction, the skeleton structure is arranged outside the magnetic structure in a sleeving mode so that the magnetic structure can be contained in the cavity, and the magnetic structure serves as a vibrator of the motor; the framework structure comprises a base body part with a first end and a second end which are opposite to each other in the axial direction, a first connecting part connected to the first end, and a second connecting part connected to the second end; a winding area located between the first end and the second end is formed on the peripheral side of the base part, and a coil is wound around the winding area. A matching area is arranged on the outer surface of the first side of the first connecting part, and the matching area is used for being connected with an external part in a matched mode and avoiding a lead of the coil; the base body part is manufactured through a stamping process; the first connecting part and the second connecting part are formed through an injection molding process and are connected to the base body part. Stamping and injection molding processes are combined, the structural precision and consistency are improved, and mass production is achieved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of motor stator manufacturing, and particularly relates to a framework structure and a manufacturing method thereof. BACKGROUND

[0002] The framework structure can be used as a stator, and a magnetic steel, a mass block and the like are inserted into the framework structure as a vibrator. The magnetic steel generates a magnetic field, and the magnetic field passes through the framework structure when the vibrator moves axially. The induced electrons generated by the framework structure generate an opposite magnetic field to slow down the axial movement of the vibrator, that is, the kinetic energy of the vibrator is converted into electric energy in the framework structure, thereby generating a damping effect to slow down the axial movement of the vibrator. However, the framework structure has many processing feature points, a small volume, high precision requirements, and a difficult manufacturing process, and cannot be mass-produced.

[0003] Therefore, it is necessary to provide a new framework structure and a manufacturing method thereof. SUMMARY

[0004] The present application aims to provide a framework structure and a manufacturing method thereof, which can reduce the manufacturing difficulty of the framework structure, ensure the precision, and realize mass production.

[0005] The technical scheme of the present application is as follows: The present application provides a framework structure in the first aspect, which is used for connecting a coil to serve as a stator of an electric machine. The framework structure has a cavity penetrating along an axial direction. The framework structure is used for sleeving outside a magnetic structure, so that the magnetic structure is accommodated in the cavity. The magnetic structure serves as a vibrator of the electric machine. The framework structure has a base body portion with a first end and a second end opposite along the axial direction. The framework structure further includes a first connecting portion connected to the first end and a second connecting portion connected to the second end. An outer peripheral side of the base body portion is formed with a winding area located between the first end and the second end. The winding area is used for winding a coil. The framework structure has a first side and a second side opposite along a first direction. The first connecting portion is provided with a fitting area on an outer surface of the first side, which is recessed from the outer surface to an inner portion of the first connecting portion. The fitting area is used for cooperating with an external part for connecting and for avoiding a lead wire of the coil. The first direction is orthogonal to the axial direction. The base body portion is made by a stamping process. The first connecting portion and the second connecting portion are formed by an injection molding process and connected to the base body portion.

[0006] Further, in some embodiments, the base portion is provided with a first recessed area at the edge of the first end, the first recessed area being recessed from the first end towards the second end, and a portion of the first connecting portion is embedded in the first recessed area; the base portion is provided with a second recessed area at the edge of the second end, the second recessed area being recessed from the second end towards the first end, and a portion of the second connecting portion is embedded in the second recessed area.

[0007] Further, in some embodiments, the first recessed area comprises a first groove at the first side, and a plurality of second grooves at the second side and spaced apart along a second direction, the second direction being orthogonal to the axial direction and orthogonal to the first direction; the base portion is provided with two positioning structures within the first groove, the two positioning structures extending along the axial direction and spaced apart along the second direction, the extension length of the positioning structures being less than the length of the sidewall of the first groove, the positioning structures dividing the first groove into two first sub-grooves and a second sub-groove between the two first sub-grooves; the volume of the first groove is greater than the sum of the volumes of the plurality of second grooves, and the volumes of the plurality of second grooves are the same or different.

[0008] Further, in some embodiments, the positioning structure is provided with a positioning protrusion at the side away from the second end along the axial direction, the positioning protrusion protruding along the second direction and from the first sub-groove towards the second sub-groove.

[0009] Further, in some embodiments, the bottom of the second sub-groove is recessed to form a positioning groove, and the sidewall of the positioning groove is arc-shaped.

[0010] Further, in some embodiments, the second recessed area comprises a plurality of third grooves spaced apart at the second end, the plurality of third grooves being symmetrically distributed along the first direction and / or the second direction, the second direction being orthogonal to the axial direction and orthogonal to the first direction.

[0011] Further, in some embodiments, the base portion is further provided with a first positioning hole at the first end and a second positioning hole at the second end, a portion of the first connecting portion being embedded in the first positioning hole, and a portion of the second connecting portion being embedded in the second positioning hole.

[0012] Further, in some embodiments, the base portion comprises a main body portion, and two arc-shaped portions respectively connected to the axial ends of the main body portion; the winding area is formed in the main body portion; the arc-shaped portions are bent and extended outwards from the cavity along the radial direction of the base portion; at least part of the first recessed area and / or at least part of the second recessed area extend from the arc-shaped portions to the main body portion.

[0013] The second aspect of the present application provides a manufacturing method of the skeleton structure, for manufacturing the skeleton structure; the manufacturing method comprises: step 1, manufacturing the base part through a stamping process; step 2, providing a mold, placing the base part in the mold, and reserving a glue injection port between the base part and the mold; step 3, injecting raw materials of the first connecting part and the second connecting part into the glue injection port, to form the first connecting part at the first end and the second connecting part at the second end, so as to form the skeleton structure.

[0014] Further, in some embodiments, the glue injection port is reserved between the base part and the mold in step 2, and specifically comprises: a first glue injection port is reserved between the mold and the first end, so that the first glue injection port is formed in the matching area; and a second glue injection port is reserved between the mold and the second end, so that the second glue injection port is formed at one end of the second connecting part close to the base part in the axial direction.

[0015] The present application has the beneficial effects that: the skeleton structure is divided into the base part, the first connecting part and the second connecting part. The base part is manufactured through a stamping process, and the first connecting part and the second connecting part are formed at two ends of the base part in the axial direction through an injection molding process with the base part as a medium. Since the outer peripheral side of the base part can be used as a winding area, it is not necessary to process too many complex feature points on the plane of stamping, so that the stamping process is simplified, the precision is ensured, the consistency of the base part is improved, and batch production of the base part is realized. In addition, the first connecting part and the second connecting part are injection molded on the base part without a sintering process, so that the size fluctuation of the first connecting part and the second connecting part is prevented, the structural precision and consistency are ensured, and batch production of the first connecting part and the second connecting part is realized. Therefore, the combination of the stamping process and the injection molding process in the embodiments of the present application can reduce the manufacturing difficulty, improve the structural precision, and realize mass production of the skeleton structure. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 Fig. 1 is a schematic diagram of a three-dimensional structure of the skeleton structure of the present application; Figure 2 Fig. 2 is a schematic diagram of a cross-sectional structure in the A-A direction of the skeleton structure of the present application; Figure 1 Figure 3 Fig. 3 is a schematic diagram of an exploded three-dimensional structure of the skeleton structure of the present application.

[0017] ​In the drawings, the reference signs represent: 1, base part; 11, first end; 111, first recessed area; 1111, first groove; 1111A, first sub-groove; 1111B, second sub-groove; 1112, second groove; 12, second end; 121, second recessed area; 1211, third groove; 13, winding area; 14, positioning structure; 141, positioning protrusion; 142, positioning groove; 15, first positioning hole; 16, second positioning hole; 101, main body part; 102, arc-shaped part; 2, first connecting part; 21, fitting area; 210, first glue injection port; 3, second connecting part; 30, second glue injection port; 10, first side; 20, second side; 100, cavity; 1000, glue inlet. DETAILED DESCRIPTION

[0018] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0019] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0020] The skeleton structure can serve as a stator, and the skeleton structure has a magnetic steel, a mass block and the like inserted in the middle as a vibrator. The magnetic steel generates a magnetic field, and when the vibrator moves axially, the magnetic field passes through the skeleton structure, and the induced electrons generated by the skeleton structure generate an opposite magnetic field to slow down the axial movement of the vibrator, that is, the kinetic energy of the vibrator is converted into electrical energy in the skeleton structure, thereby producing a damping effect to slow down the axial movement of the vibrator. However, the skeleton structure needs to process many feature points, usually including a winding area and a part fitting area, and the skeleton structure has a small volume, and at the same time requires a size tolerance of ±0.02 or less. Therefore, it is a challenge for those skilled in the art to manufacture a high-precision skeleton structure.

[0021] In the related art, the skeleton structure is usually directly manufactured by an injection molding process or a stamping process. However, for the injection molding process, a sintering process needs to be combined after injection molding, and the skeleton structure manufactured by injection molding is sintered at high temperature. During the sintering process, the material powder particles diffuse and fuse to form densification. However, this can cause the overall size of the skeleton structure to fluctuate greatly, can cause poor precision, and cannot meet the size requirements, and the consistency is not good. For the stamping process, the conventional production and manufacturing process is to stamp a plane first and then roll into a curved surface. This requires various feature points to be processed on a metal strip of a certain thickness, which will increase the processing difficulty and also cause the precision requirement to be unable to be met, and the mass production is not high.

[0022] Therefore, it is necessary to provide a new skeleton structure and a manufacturing method thereof.

[0023] The application will be further described below in conjunction with the drawings and embodiments.

[0024] As Figures 1-3 In a first aspect, the application provides a skeleton structure for connecting a coil to serve as a stator of an electric machine. The skeleton structure has a cavity 100 extending in an axial direction. The skeleton structure is configured to be sleeved on a magnetic structure so that the magnetic structure is accommodated in the cavity 100, and the magnetic structure serves as a vibrator of the electric machine. The skeleton structure has a base portion 1 with a first end 11 and a second end 12 opposite to each other in the axial direction. The skeleton structure further includes a first connecting portion 2 connected to the first end 11 and a second connecting portion 3 connected to the second end 12. The base portion 1 has a winding area 13 formed on an outer circumferential side thereof between the first end 11 and the second end 12. The winding area 13 is configured to wind the coil. The skeleton structure has a first side 10 and a second side 20 opposite to each other in a first direction. The first connecting portion 2 has a fitting area 21 recessed from an outer surface of the first side 10 to an inner portion of the first connecting portion. The fitting area 21 is configured to be connected to an external part and to avoid a lead wire of the coil. The first direction is orthogonal to the axial direction. The base portion 1 is manufactured by a stamping process. The first connecting portion 2 and the second connecting portion 3 are formed by an injection molding process and are connected to the base portion 1.

[0025] In the embodiment of the present application, the skeleton structure is divided into a base part 1, a first connecting part 2 and a second connecting part 3. The base part 1 is made by stamping process, and the first connecting part 2 and the second connecting part 3 are formed on the two ends of the base part 1 in the axial direction by injection molding process with the base part 1 as the medium. Since the outer peripheral side of the base part 1 can be used as a winding area 13, it is not necessary to process too many complex feature points on the plane of stamping, which simplifies the stamping process, ensures the precision, improves the consistency of the base part 1 and realizes batch production of the base part 1. In addition, the first connecting part 2 and the second connecting part 3 are injection molded on the base part 1 without sintering process, which can prevent the size fluctuation of the first connecting part 2 and the second connecting part 3, ensure the structural precision and consistency and realize batch production of the first connecting part 2 and the second connecting part 3. Therefore, the embodiment of the present application can reduce the manufacturing difficulty, improve the structural precision and realize mass production of the skeleton structure by combining the stamping process and the injection molding process.

[0026] It can be understood that the base part 1, the first connecting part 2 and the second connecting part 3 are all formed with a cavity 100 penetrating in the axial direction to allow the vibrator to be arranged in the cavity 100.

[0027] For example, as shown in FIG. 1, the first direction is the X-axis direction in the figure, and the axial direction is the Y-axis direction in the figure. Figure 1 Figure 1 Figure 1

[0028] Further, in some embodiments, the base part 1 is provided with a first recessed area 111 at the edge of the first end 11, which is recessed from the first end 11 to the second end 12, and part of the material of the first connecting part 2 is embedded in the first recessed area 111; the base part 1 is provided with a second recessed area 121 at the edge of the second end 12, which is recessed from the second end 12 to the first end 11, and part of the material of the second connecting part 3 is embedded in the second recessed area 121.

[0029] Specifically, since the edge of the first end 11 of the base part 1 is provided with the first recessed area 111, which is recessed from the first end 11 to the second end 12, when the first connecting part 2 is injection molded, part of the material can be embedded in the first recessed area 111 from the first end 11, so that stable connection of the base part 1 and the first connecting part 2 can be realized, the relative displacement of the base part 1 and the first connecting part 2 can be prevented, and the stability of the skeleton structure can be improved. Similarly, since the edge of the second end 12 of the base part 1 is provided with the second recessed area 121, part of the material of the second connecting part 3 can be embedded in the second recessed area 121, so that stable connection of the base part 1 and the second connecting part 3 can be realized, the relative displacement of the base part 1 and the second connecting part 3 can be prevented, and the stability of the skeleton structure can be improved.

[0030] ​​​Further, in some embodiments, the first recessed area 111 includes a first groove 1111 located at the first side 10, and a plurality of second grooves 1112 located at the second side 20 and spaced apart along a second direction; the second direction is orthogonal to the axial direction and orthogonal to the first direction; the base portion 1 is provided with positioning structures 14 extending along the axial direction and spaced apart along the second direction within the first groove 1111, the extension length of the positioning structures 14 is less than the length of the sidewall of the first groove 1111, and the positioning structures 14 divide the first groove 1111 into two first sub-grooves 1111A and a second sub-groove 1111B located between the two first sub-grooves 1111A; the volume of the first groove 1111 is greater than the sum of the volumes of the plurality of second grooves 1112, and the volumes of the plurality of second grooves 1112 are the same or different.

[0031] For example, the second direction is Figure 1 parallel to the Z-axis.

[0032] Specifically, at the first end 11 of the base portion 1, the first groove 1111 is provided at the first side 10 (corresponding to the side of the first connecting portion 2 where the matching area 21 is provided), and the plurality of second grooves 1112 are provided at the second side 20, so that part of the material of the first connecting portion 2 can be embedded into the first groove 1111 and part of the material can be embedded into the second groove 1112. Since the volume of the first groove 1111 is relatively greater than the sum of the volumes of the plurality of second grooves 1112, the part of the first connecting portion 2 embedded into the first groove 1111 can reserve space to form the matching area 21, preventing the first connecting portion 2 from being structurally weak at the first side 10 due to the formation of the matching area 21, and ensuring the structural strength of the first connecting portion 2 in the first groove 1111 and the second groove 1112. In addition, the positioning structures 14 are further protruded in the first groove 1111, so that the positioning structures 14 and the first connecting portion 2 cooperate with each other to improve the connection stability of the first connecting portion 2 in the first groove 1111. Furthermore, by having two first sub-grooves 1111A and one second sub-groove 1111B at the first end 11 and a plurality of second grooves 1112 at the second end 12, the first connecting portion 2 can be more uniform at the first end 11, avoiding excessive concentration, and the structural stability can be improved.

[0033] It should be noted that the first recessed area 111 includes the first groove 1111 and the second groove 1112, so the recessed direction of the first groove 1111 and the second groove 1112 is the same as the recessed direction of the first recessed area 111, which will not be described here.

[0034] It can be understood that the volume of the plurality of second grooves 1112 can not be the same, any two can be the same, and the plurality of second grooves 1112 can also be the same, which does not affect the stability of the connection of the first connecting part 2 in the first groove 1111, and can be set according to actual needs.

[0035] In addition, the volume of the first groove 1111 and the second groove 1112 and the like can depend on the depth, length and width of the groove. The first groove 1111 and the second groove 1112 can have the same width, but different lengths and depths; the second grooves 1112 can also have the same width, but different lengths and depths.

[0036] In addition, the base part 1 further includes a third side and a fourth side orthogonal to the first side 10, the third side and the fourth side are oppositely arranged along the first direction, two first sub-grooves 1111A in the first groove 1111 can respectively extend to the third side and the fourth side, similarly, in the plurality of second grooves 1112 of the second side 20, the two second grooves 1112 on the two outermost sides can respectively extend to the third side and the fourth side, so that the four corners of the first end 11 of the base part 1 can all be embedded with part of the first connecting part 2.

[0037] Further, in some embodiments, the positioning structure 14 is provided with a positioning protrusion 141 on one side away from the second end 12 in the axial direction, and the positioning protrusion 141 protrudes in the second direction and from the first sub-groove 1111A to the second sub-groove 1111B.

[0038] Specifically, the two opposite sides of the positioning structure 14 form the side walls of the second sub-groove 1111B, and the positioning structure 14 and the positioning protrusion 141 correspond one by one, and the two positioning protrusions 141 are actually formed on the two opposite side walls of the second sub-groove 1111B, so that when the first connecting part 2 is formed in the second sub-groove 1111B, the connection stability of the first connecting part 2 in the second sub-groove 1111B can be improved.

[0039] Further, in some embodiments, the bottom of the second sub-groove 1111B is recessed to form a positioning groove 142, and the groove wall of the positioning groove 142 is arc-shaped. In this way, the first connecting part 2 flowing into the second sub-groove 1111B can also have part of the material flowing between the two positioning grooves 142, thereby improving the connection stability of the first connecting part 2 in the second sub-groove 1111B.

[0040] In some specific embodiments, the positioning structure 14 protrudes towards the second sub-groove 1111B on one side in the axial direction, and the bottom of the second sub-groove 1111B is recessed to form a positioning groove 142 with an arc-shaped groove wall, so that the connection stability of the first connecting part 2 in the second sub-groove 1111B can be further improved.

[0041] Further, in some embodiments, the second recessed area 121 comprises a plurality of third grooves 1211 distributed at intervals on the second end 12, the plurality of third grooves 1211 are symmetrically distributed along the first direction and / or the second direction, the second direction is orthogonal to the axial direction and orthogonal to the first direction.

[0042] Specifically, the second recessed area 121 can be a plurality of third grooves 1211, and among the plurality of third grooves 1211, some can be symmetrically distributed along the first direction, some can be symmetrically distributed along the second direction, and some can be symmetrically distributed along the first direction and some can be symmetrically distributed along the second direction, in this way, part of the material of the second connecting part 3 can be respectively embedded into the plurality of third grooves 1211, so as to improve the connection stability of the second connecting part 3 and the base part 1, and further make the connection of the second connecting part 3 and the base part 1 more uniform and stable.

[0043] In some specific embodiments, the second recessed area 121 can be four third grooves 1211 distributed at intervals on the four corners of the second end 12, and part of the material of the second connecting part 3 can be respectively embedded into the four third grooves 1211, in this way, the connection stability of the second connecting part 3 and the base part 1 can be improved. In addition, the four third grooves 1211 are arranged respectively, so that the second connecting part 3 is embedded on the four corners of the second end 12 of the base part 1, so as to make the connection of the second connecting part 3 and the base part 1 more uniform and stable.

[0044] It should be noted that the second recessed area 121 comprises the third groove 1211, therefore, the recess direction of the third groove 1211 is the same as the recess direction of the second recessed area 121, which will not be described here.

[0045] In some specific embodiments, the framework structure has a first side 10 and a second side 20 oppositely arranged along the first direction, and a third side and a fourth side orthogonal to the first side 10, the third side and the fourth side are oppositely arranged along the first direction, the first side 10 can be provided with two third grooves 1211, and one of the two third grooves 1211 can extend to the third side, and the other third groove 1211 can extend to the fourth side; similarly, the second side 20 can be provided with two third grooves 1211, and the two third grooves 1211 respectively extend to the third side and the fourth side, which can improve the connection stability of the second connecting part 3 and the base part 1.

[0046] Further, in some embodiments, the base part 1 is further provided with a first positioning hole 15 located at the first end 11 and a second positioning hole 16 located at the second end 12, part of the material of the first connecting part 2 is embedded into the first positioning hole 15, and part of the material of the second connecting part 3 is embedded into the second positioning hole 16.

[0047] Specifically, by embedding part of the material of the first connecting portion 2 into the first positioning hole 15, the connection stability of the first connecting portion 2 and the base portion 1 can be improved, and the relative displacement of the base portion 1 and the first connecting portion 2 can be prevented, thereby improving the stability of the framework structure; by embedding part of the material of the second connecting portion 3 into the second positioning hole 16, the connection stability of the second connecting portion 3 and the base portion 1 can be improved, and the relative displacement of the base portion 1 and the second connecting portion 3 can be prevented, thereby improving the stability of the framework structure.

[0048] In some specific embodiments, the framework structure has a first side 10 and a second side 20 oppositely arranged along a first direction, and a third side and a fourth side orthogonal to the first side 10, the third side and the fourth side oppositely arranged along the first direction, the first recessed area 111 and the second recessed area 121 can be mainly arranged on the first side 10 and the second side 20, and the first positioning hole 15 and the second positioning hole 16 can be mainly arranged on the third side and the fourth side, thereby improving the connection firmness of the first connecting portion 2 and the base portion 1 and the second connecting portion 3 and the base portion 1, and improving the structural stability of the framework structure.

[0049] Further, in some embodiments, the base portion 1 includes a main body portion 101 and two arc-shaped portions 102 respectively connected to the main body portion 101 at both axial ends, and the winding area 13 is formed on the main body portion 101; the arc-shaped portion 102 extends outwardly from the cavity 100 along the radial direction of the base portion 1; at least part of the first recessed area 111 and / or at least part of the second recessed area 121 extends from the arc-shaped portion 102 to the main body portion 101.

[0050] Specifically, the main body portion 101 of the base portion 1 is mainly in the shape of a circular ring column, and the two arc-shaped portions 102 are respectively formed by bending outwardly at both axial ends of the main body portion 101. That is, the first end 11 and the second end 12 of the base portion 1 are respectively the two arc-shaped portions 102, so that one of the arc-shaped portions 102 can be connected to the first connecting portion 2, so that the first connecting portion 2 and the corresponding arc-shaped portion 102 have multidirectional interaction forces, and the connection stability of the first connecting portion 2 and the base portion 1 can be improved; the other arc-shaped portion 102 can be connected to the second connecting portion 3, so that the second connecting portion 3 and the corresponding arc-shaped portion 102 have multidirectional interaction forces, and the connection stability of the second connecting portion 3 and the base portion 1 can also be improved.

[0051] In addition, it is understandable that the first recessed area 111 is arranged at the edge of the first end 11, and thus the first recessed area 111 is arranged at least partially in one of the arc-shaped portions 102. Similarly, the second recessed area 121 is arranged at the edge of the second end 12, and thus the second recessed area 121 is arranged at least partially in the other arc-shaped portion 102. In some specific embodiments, the first recessed area 111 extends from one of the arc-shaped portions 102 to the main body portion 101 by a distance, and the second recessed area 121 extends from the edge of the other arc-shaped portion 102 to the main body portion 101 by a distance. In this way, the first connecting portion 2 and the main body portion 1, and the second connecting portion 3 and the main body portion 1 are connected firmly.

[0052] In some specific embodiments, the first connecting portion 2 is arranged at the first end 11 of the main body portion 1 and surrounds the outer periphery of the main body portion 1. In addition, the first connecting portion 2 protrudes outward relative to the outer periphery of the main body portion 1 along the radial direction of the main body portion 1. In this way, the connection stability of the first connecting portion 2 to the main body portion 1 is further improved. Similarly, the second connecting portion 3 is arranged at the second end 12 of the main body portion 1 and surrounds the outer periphery of the main body portion 1. In addition, the second connecting portion 3 protrudes outward relative to the outer periphery of the main body portion 1 along the radial direction of the main body portion 1. In this way, the connection stability of the second connecting portion 3 to the main body portion 1 is further improved.

[0053] The second aspect of the embodiments of the present application provides a manufacturing method for manufacturing the framework structure. The manufacturing method comprises the following steps. Step 1: manufacturing the main body portion 1 by a stamping process; Step 2: providing a mold, placing the main body portion 1 in the mold, and reserving a glue injection port between the main body portion 1 and the mold; Step 3: injecting raw materials of the first connecting portion 2 and the second connecting portion 3 into the glue injection port, so as to form the first connecting portion 2 at the first end 11 of the main body portion 1 and the second connecting portion 3 at the second end 12 of the main body portion 1, thereby forming the framework structure.

[0054] Specifically, the base part 1 is made by a stamping process, since the outer peripheral side of the base part 1 can be used as the winding area 13, it is not necessary to process too many complex feature points on the plane of the stamping, which simplifies the stamping process, and also ensures the precision and consistency of the base part 1, and realizes batch production of the base part 1. In addition, in the injection molding process, the mold and the base part 1 can be used as media, and a glue injection port is reserved between the mold and the base part 1, so that the raw materials of the first connecting part 2 and the second connecting part 3 can be injected through the glue injection port, thereby forming the first connecting part 2 at the first end 11 of the base part 1 and forming the second connecting part 3 at the second end 12 of the base part 1. Since the injection molding process does not need to go through the sintering process, it can prevent the size fluctuation of the first connecting part 2 and the second connecting part 3, and also ensure the structural precision and consistency, and realize batch production of the first connecting part 2 and the second connecting part 3. Therefore, the embodiment of the present application can reduce the manufacturing difficulty, improve the structural precision, and realize mass production of the skeleton structure by combining the stamping process and the injection molding process.

[0055] For example, the base part 1 can be made of copper or stainless steel; and the raw materials of the first connecting part 2 and the second connecting part 3 can be plastic materials.

[0056] Further, in some embodiments, a glue injection port is reserved between the base part 1 and the mold in step 2, specifically including: a first glue injection port 210 is reserved between the mold and the first end 11, so that the first glue injection port 210 is formed on the matching area 21; and a second glue injection port 30 is reserved between the mold and the second end 12, so that the second glue injection port 30 is formed on the end of the second connecting part 3 close to the base part 1 in the axial direction.

[0057] Specifically, the first glue injection port 210 is present between the mold and the first end 11 of the base part 1, and when the first connecting part 2 is injection molded, the raw materials of the first connecting part 2 can be injected from the first glue injection port 210, so that the first connecting part 2 is formed on the first end 11. After the mold is removed, the structure of the first glue injection port 210 is formed on the matching area 21 of the first connecting part 2. Similarly, the second glue injection port 30 is present between the mold and the second end 12 of the base part 1, and when the second connecting part 3 is injection molded, the raw materials of the second connecting part 3 can be injected from the second glue injection port 30, so that the second connecting part 3 is formed on the second end 12. After the mold is removed, the structure of the second glue injection port 30 is formed on the end of the second connecting part 3 close to the base part 1 in the axial direction.

[0058] In some specific embodiments, the first glue injection port 210 formed on the matching area 21 includes a body part protruding from the matching area 21, and a groove is recessed inward from the surface of the body part. Similarly, the second glue injection port 30 is a groove recessed inward from the surface of the second connecting part 3.

[0059] Further, in some embodiments, the skeleton structure can be used to connect with the shell, and the skeleton structure and the shell can jointly serve as the stator of the motor. For example, a plurality of glue inlets 1000 are arranged at the end of the first connecting portion 2 away from the base portion 1 in a circumferential direction, and a plurality of glue inlets 1000 are arranged at the end of the second connecting portion 3 away from the base portion 1 in a circumferential direction. When the skeleton structure and the shell are assembled, glue can be injected from the glue inlets 1000, so that the skeleton structure and the shell are bonded. By arranging a plurality of glue inlets, the connection between the skeleton structure and the shell can be more uniform and firm.

[0060] The above merely illustrates the embodiments of the present application, and it should be noted that, for those skilled in the art, improvements can be made without departing from the concept of the present application, and these improvements shall fall within the protection scope of the present application.

Claims

1. A skeleton structure for connecting coils to serve as the stator of a motor; the skeleton structure having an axially extending cavity, the skeleton structure being fitted over a magnetic structure so that the magnetic structure is housed within the cavity, the magnetic structure serving as an oscillator of the motor; characterized in that, The skeleton structure has a base portion having a first end and a second end opposite to each other along the axial direction. The skeleton structure further includes a first connecting portion connected to the first end and a second connecting portion connected to the second end. A winding region is formed on the outer periphery of the base portion between the first end and the second end, and the winding region is used to wind a coil. The skeleton structure has a first side and a second side opposite to each other along a first direction. The first connecting portion has a mating region on the outer surface of the first side that is recessed from the outer surface to the inside of the first connecting portion. The mating region is used to connect with external parts and to avoid the lead wire of the coil. The first direction is orthogonal to the axial direction. The base portion is formed by a stamping process; the first connecting portion and the second connecting portion are formed and connected to the base portion by an injection molding process.

2. The skeleton structure according to claim 1, characterized in that, The base portion has a first recessed area at the edge of the first end that is recessed from the first end toward the second end, and a portion of the material of the first connecting portion is embedded in the first recessed area; the base portion has a second recessed area at the edge of the second end that is recessed from the second end toward the first end, and a portion of the material of the second connecting portion is embedded in the second recessed area.

3. The skeleton structure according to claim 2, characterized in that, The first recessed area includes a first groove located on the first side and a plurality of second grooves located on the second side and spaced apart along a second direction, wherein the second direction is orthogonal to the axial direction and orthogonal to the first direction; The base portion is provided with two positioning structures that extend axially and are spaced apart in the second direction within the first groove. The extension length of the positioning structure is less than the length of the sidewall of the first groove. The positioning structure divides the first groove into two first sub-grooves and a second sub-grooves located between the two first sub-grooves. The volume of the first groove is greater than the sum of the volumes of the plurality of second grooves, and the volumes of the plurality of second grooves may be the same or different.

4. The skeleton structure according to claim 3, characterized in that, The positioning structure has a positioning protrusion on the side away from the second end along the axial direction. The positioning protrusion protrudes along the second direction and from the first sub-groove to the second sub-groove.

5. The skeleton structure according to claim 3, characterized in that, The bottom of the second sub-groove is recessed to form a positioning groove, and the wall of the positioning groove is arc-shaped.

6. The skeleton structure according to claim 2, characterized in that, The second recessed area includes a plurality of third grooves spaced apart at the second end. The plurality of third grooves are symmetrically distributed along the first direction and / or the second direction, wherein the second direction is orthogonal to the axial direction and orthogonal to the first direction.

7. The skeleton structure according to claim 1, characterized in that, The base portion is further provided with a first positioning hole at the first end and a second positioning hole at the second end, wherein a portion of the material of the first connecting portion is embedded in the first positioning hole and a portion of the material of the second connecting portion is embedded in the second positioning hole.

8. The skeleton structure according to claim 2, characterized in that, The base portion includes a main body portion and two arc-shaped portions respectively connected to both ends of the main body portion along the axial direction; The winding region is formed in the main body portion; the arc-shaped portion bends and extends outward from the cavity along the radial direction of the base portion; at least a portion of the first recessed region and / or at least a portion of the second recessed region extends from the arc-shaped portion to the main body portion.

9. A method for manufacturing a skeleton structure, characterized in that, A method for manufacturing the skeleton structure according to any one of claims 1 to 8; the manufacturing method includes: Step 1: Manufacture the base part using a stamping process; Step 2: Provide a mold, place the base part inside the mold, and leave a glue injection port between the base part and the mold; Step 3: Inject the raw materials of the first connecting part and the second connecting part into the glue dispensing port to form the first connecting part at the first end and the second connecting part at the second end to form a skeleton structure.

10. The method for manufacturing the skeleton structure according to claim 9, characterized in that, In step 2, a glue-applying opening is provided between the base and the mold, specifically including: A first glue-applying opening is provided between the mold and the first end, so that the first glue-applying opening is formed in the mating area; a second glue-applying opening is provided between the mold and the second end, so that the second glue-applying opening is formed at one end of the second connecting portion along the axial direction close to the base portion.

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