A framework structure and method of manufacture thereof

Abstract

The application provides a skeleton structure and a manufacturing method thereof. The skeleton structure is used for connecting coils to serve as a stator of an electric machine; the skeleton structure has a cavity penetrating in an axial direction, the skeleton structure is sleeved outside a magnetic structure so that the magnetic structure is accommodated in the cavity, and the magnetic structure serves as a vibrator of the electric machine; the skeleton structure comprises a base part having opposite first and second ends in the axial direction, a first connecting part connected to the first end, and a second connecting part connected to the second end; an outer peripheral side of the base part is formed with a winding area located between the first and second ends, and the winding area is used for winding the coils; the first connecting part is provided with a matching area on an outer surface of the first side, and the matching area is used for matching connection with external parts and avoiding lead wires of the coils; the base part is manufactured through a stamping process; and the first and second connecting parts are formed through an injection molding process and are connected to the base part. The stamping and injection molding processes are combined, the structural precision and consistency are improved, and mass production is realized.

Description

Technical Field

[0001] This invention belongs to the field of motor stator manufacturing, and particularly relates to a frame structure and its manufacturing method. Background Technology

[0002] The frame structure can serve as the stator, with interspersed magnets and mass blocks acting as oscillators. The magnets generate a magnetic field, which passes through the frame structure as the oscillator moves axially. The induced electrons in the frame structure generate an opposing magnetic field, slowing down the oscillator's axial movement. In other words, the oscillator's kinetic energy is converted into electrical energy within the frame structure, thus producing a damping effect and reducing its axial motion. However, the frame structure has many machining features, a small size, high precision requirements, and is difficult to manufacture, making mass production impossible.

[0003] Therefore, it is necessary to provide a new skeleton structure and its manufacturing method. Summary of the Invention

[0004] The purpose of this invention is to provide a skeleton structure and its manufacturing method, which can reduce the manufacturing difficulty of the skeleton structure, ensure accuracy, and achieve mass production.

[0005] The technical solution of the present invention is as follows:

[0006] The first aspect of the present invention provides a skeleton structure for connecting a coil as a stator of a motor; the skeleton structure has an axially penetrating 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; 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 including 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, the winding region being used to wind the coil; the skeleton structure has a first side and a second side opposite to each other along a first direction, the first connecting portion having a mating region recessed from the outer surface of the first side into the first connecting portion, the mating region being 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.

[0007] Furthermore, in some embodiments, 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.

[0008] Further, in some embodiments, 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, the second direction being orthogonal to the axial direction and orthogonal to the first direction; the base portion is provided with two positioning structures extending axially and spaced apart along the second direction within the first groove, 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-grooves located between the two first sub-grooves; the distance between the two sidewalls of the first groove along the second direction is greater than the sum of the distances between the two sidewalls of the plurality of second grooves along the second direction; the distances between the two sidewalls of the plurality of second grooves along the second direction are the same or different.

[0009] Furthermore, in some embodiments, the positioning structure is provided with a positioning protrusion on the side axially away from the second end, the positioning protrusion protruding along the second direction and from the first sub-groove to the second sub-groove.

[0010] Furthermore, in some embodiments, the bottom of the second sub-groove is recessed to form a positioning groove, and the wall of the positioning groove is arc-shaped.

[0011] Furthermore, in some embodiments, the second recessed area includes 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.

[0012] Furthermore, in some embodiments, the base portion is also 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.

[0013] Furthermore, in some embodiments, the base portion includes a main body portion and two arcuate 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 arcuate portions bend and extend radially outward from the cavity along the base portion; at least a portion of the first recessed region and / or at least a portion of the second recessed region extend from the arcuate portions to the main body portion.

[0014] A second aspect of the present invention provides a method for manufacturing a skeleton structure, for manufacturing the aforementioned skeleton structure; the manufacturing method includes: step 1, manufacturing a base part by a stamping process; step 2, providing a mold, placing the base part inside the mold, wherein a glue-applying opening is provided between the base part and the mold; step 3, injecting raw materials for a first connecting part and a second connecting part into the glue-applying opening to form a first connecting part at a first end and a second connecting part at a second end, thereby forming a skeleton structure.

[0015] Furthermore, in some embodiments, a glue-applying opening is provided between the base portion and the mold in step 2, 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 axially close to the base portion.

[0016] The beneficial effects of this invention are as follows: This invention divides the skeleton structure into a base portion, a first connecting portion, and a second connecting portion. The base portion is manufactured through a stamping process, and then, using the base portion as a medium, the first and second connecting portions are formed at both ends of the base portion along the axial direction through injection molding. Since the outer periphery of the base portion can serve as a winding area, it is unnecessary to process too many complex feature points on the stamping plane, simplifying the stamping process, ensuring accuracy, improving the consistency of the base portion, and enabling mass production of the base portion. Furthermore, the injection molding of the first and second connecting portions onto the base portion does not require a sintering process, thus preventing large dimensional fluctuations in the first and second connecting portions, again ensuring structural accuracy and consistency, and enabling mass production of the first and second connecting portions. Therefore, this invention, by combining stamping and injection molding processes, can reduce manufacturing difficulty, improve structural accuracy, and achieve mass production of the skeleton structure. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the skeleton structure of the present invention;

[0018] Figure 2 for Figure 1 A cross-sectional view along the AA direction;

[0019] Figure 3This is a three-dimensional exploded structural diagram of the skeleton structure of the present invention.

[0020] In the accompanying drawings, the reference numerals denote: 1. Base portion; 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 portion; 102. Arc-shaped portion; 2. First connecting portion; 21. Mating area; 210. First glue inlet; 3. Second connecting portion; 30. Second glue inlet; 10. First side; 20. Second side; 100. Cavity; 1000. Glue inlet. Detailed Implementation

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "circumferential," and "radial," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] The skeleton structure can serve as the stator, with interspersed magnets and mass blocks acting as oscillators. The magnets generate a magnetic field, which passes through the skeleton structure as the oscillator moves axially. The induced electrons generated by the skeleton structure produce an opposite magnetic field, slowing down the axial movement of the oscillator. In other words, the kinetic energy of the oscillator is converted into electrical energy within the skeleton structure, thus producing a damping effect and slowing down the axial movement. However, the skeleton structure requires machining many feature points, typically including the winding area and the component mating area. Furthermore, the skeleton structure is relatively small in size and requires dimensional tolerances within ±0.02. Therefore, manufacturing high-precision skeleton structures is a challenge for those skilled in the art.

[0024] In related technologies, the skeleton structure is usually directly produced through injection molding or stamping. However, for injection molding, a sintering process is required after injection molding to sinter the molded skeleton structure at high temperature. During sintering, the material powder particles diffuse and fuse to form densification. However, this leads to large fluctuations in the overall size of the skeleton structure, resulting in poor accuracy, inability to meet dimensional requirements, and poor consistency. For stamping, the conventional manufacturing process involves stamping a flat surface and then rolling it into a curved surface. This requires machining various feature points on a metal strip of a certain thickness, which increases the processing difficulty and also leads to failure to meet accuracy requirements, resulting in low mass production capability.

[0025] Therefore, it is necessary to provide a new skeleton structure and its manufacturing method.

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] like Figure 1-3 The first aspect of this invention provides a skeleton structure for connecting coils to serve as the stator of a motor. The skeleton structure has an axially penetrating cavity 100. The skeleton structure is fitted over a magnetic structure so that the magnetic structure is housed within the cavity 100, and the magnetic structure serves as the oscillator of the motor. The skeleton structure has a base portion 1, which has a first end 11 and a second end 12 axially opposed to each other. 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. A positioning feature is formed on the outer periphery of the base portion 1. A winding region 13 is located between the first end 11 and the second end 12, and the winding region 13 is used to wind the coil; the skeleton structure has a first side 10 and a second side 20 that are opposite to each other along a first direction; the first connecting part 2 is provided with a mating region 21 that is recessed from the outer surface to the inside of the first connecting part on the outer surface of the first side 10; the mating region 21 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 part 1 is formed by a stamping process; the first connecting part 2 and the second connecting part 3 are formed by an injection molding process and connected to the base part 1.

[0028] In this embodiment of the invention, the skeleton structure is divided into a base portion 1, a first connecting portion 2, and a second connecting portion 3. The base portion 1 is manufactured by stamping, and the first connecting portion 2 and the second connecting portion 3 are formed on both ends of the base portion 1 along the axial direction using injection molding, with the base portion 1 as the medium. Since the outer periphery of the base portion 1 can serve as a winding region 13, it is unnecessary to process too many complex feature points on the stamping plane, simplifying the stamping process, ensuring accuracy, improving the consistency of the base portion 1, and enabling mass production of the base portion 1. Furthermore, the injection molding of the first connecting portion 2 and the second connecting portion 3 onto the base portion 1 does not require a sintering process, thus preventing large dimensional fluctuations in the first connecting portion 2 and the second connecting portion 3, and similarly ensuring structural accuracy and consistency, enabling mass production of the first connecting portion 2 and the second connecting portion 3. Therefore, this embodiment of the invention, by combining stamping and injection molding processes, can reduce manufacturing difficulty, improve structural accuracy, and achieve mass production of the skeleton structure.

[0029] Understandably, the base portion 1, the first connecting portion 2, and the second connecting portion 3 are all formed to penetrate along the axial direction to form a cavity 100, for the oscillator to be inserted into the cavity 100.

[0030] For example, such as Figure 1 As shown, the first direction is Figure 1 In the X-axis direction, the axial direction is Figure 1 In the Y-axis direction.

[0031] Furthermore, in some embodiments, the base portion 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 a portion of the material of the first connecting portion 2 is embedded in the first recessed area 111; the base portion 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 a portion of the material of the second connecting portion 3 is embedded in the second recessed area 121.

[0032] Specifically, since a first recessed area 111 is provided at the edge of the first end 11 of the base portion 1, and the first recessed area 111 is formed by recessing from the first end 11 towards the second end 12, when the first connecting portion 2 is injection molded, a portion of the material can be embedded into the first recessed area 111 from the first end 11, thereby achieving a stable connection between the base portion 1 and the first connecting portion 2, preventing relative displacement between the base portion 1 and the first connecting portion 2, and improving the stability of the skeleton structure; similarly, a second recessed area 121 is provided at the edge of the second end 12 of the base portion 1, and a portion of the material of the second connecting portion 3 can be embedded into the second recessed area 121, thereby achieving a stable connection between the base portion 1 and the second connecting portion 3, preventing relative displacement between the base portion 1 and the second connecting portion 3, and improving the stability of the skeleton structure.

[0033] Further, in some embodiments, the first recessed area 111 includes a first groove 1111 located on the first side 10 and a plurality of second grooves 1112 located on the second side 20 and spaced apart along the second direction; the second direction is orthogonal to the axial direction and orthogonal to the first direction; the base portion 1 is provided with a positioning structure 14 extending axially and spaced apart along the second direction in the first groove 1111, the extension length of the positioning structure 14 is less than the length of the sidewall of the first groove 1111, the positioning structure 14 divides the first groove 1111 into two first sub-grooves 1111A and a second sub-grooves 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, that is, the distance between the two sidewalls of the first groove 1111 along the second direction is greater than the sum of the distances between the two sidewalls of the plurality of second grooves 1112 along the second direction; the volume of the plurality of second grooves 1112 is the same or different, that is, the distance between the two sidewalls of the plurality of second grooves 1112 along the second direction is the same or different.

[0034] For example, the second direction is Figure 1 The direction is parallel to the Z-axis.

[0035] Specifically, at the first end 11 of the base portion 1, a first groove 1111 is provided on the first side 10 (the side corresponding to the first connecting portion 2 where the mating area 21 is provided), and a plurality of second grooves 1112 are provided on the second side 20. This allows part of the material of the first connecting portion 2 to be embedded in the first groove 1111 and part of the material to be embedded in the second grooves 1112. Since the volume of the first groove 1111 is relatively larger than the sum of the volumes of the plurality of second grooves 1112, space can be reserved in the portion of the first connecting portion 2 embedded in the first groove 1111 to form the mating area 21. This prevents the first connecting portion 2 from becoming structurally weak on the first side 10 due to the formation of the mating area 21, thus ensuring the structural strength of the first connecting portion 2 in the first groove 1111 and the second groove 1112. In addition, a positioning structure 14 protrudes from the first groove 1111. Thus, the positioning structure 14 and the first connecting portion 2 cooperate with each other, improving the connection stability of the first connecting portion 2 within the first groove 1111. Furthermore, by having two first sub-grooves 1111A and one second sub-grooves 1111B on the first side 10, and multiple second grooves 1112 on the second end 12, the first connecting portion 2 can be made more uniform at the first end 11, avoiding excessive concentration and improving structural stability.

[0036] It should be noted that the first recessed area 111 includes a first groove 1111 and a second groove 1112. Therefore, 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 elaborated here.

[0037] Understandably, the volume of the multiple second grooves 1112 can be different, any two can be the same, or all of the multiple second grooves 1112 can be the same. This does not affect the connection stability of the first connecting part 2 in the first groove 1111, and can be set according to actual needs.

[0038] Furthermore, the volume of the first groove 1111 and the second groove 1112, etc., 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.

[0039] In addition, the base portion 1 also includes a third side and a fourth side orthogonal to the first side 10. The third side and the fourth side are arranged opposite each other along the first direction. The two first sub-grooves 1111A in the first groove 1111 can extend partially to the third side and the fourth side, respectively. Similarly, in the plurality of second grooves 1112 on the second side 20, the two outermost second grooves 1112 on both sides can extend partially to the third side and the fourth side, respectively. Thus, a portion of the first connecting portion 2 can be embedded in each of the four corners of the first end 11 of the base portion 1.

[0040] Furthermore, in some embodiments, the positioning structure 14 is provided with a positioning protrusion 141 on the side away from the second end 12 along the axial direction. The positioning protrusion 141 protrudes along the second direction and from the first sub-groove 1111A to the second sub-groove 1111B.

[0041] Specifically, the two positioning structures 14 form the sidewalls of the second sub-groove 1111B on opposite sides. The positioning structures 14 and the positioning protrusions 141 correspond one-to-one. The two positioning protrusions 141 are actually formed on opposite sidewalls of the second sub-groove 1111B. In this way, 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.

[0042] Furthermore, in some embodiments, the bottom of the second sub-groove 1111B is recessed to form a positioning groove 142, and the wall of the positioning groove 142 is arc-shaped. In this way, some material flowing to the first connecting portion 2 of the second sub-groove 1111B can flow between the two positioning grooves 142, thereby improving the connection stability of the first connecting portion 2 within the second sub-groove 1111B.

[0043] In some specific embodiments, the positioning structure 14 has a positioning protrusion 141 protruding into the second sub-groove 1111B on one side along the axial direction. At the same time, the bottom of the second sub-groove 1111B is recessed to form a positioning groove 142 with an arc-shaped groove wall. In this way, the connection stability of the first connecting part 2 in the second sub-groove 1111B can be further improved.

[0044] Furthermore, in some embodiments, the second recessed region 121 includes a plurality of third grooves 1211 spaced apart at the second end 12, the plurality of third grooves 1211 being symmetrically distributed along a first direction and / or a second direction, the second direction being orthogonal to the axial direction and orthogonal to the first direction.

[0045] Specifically, the second recessed area 121 can be a plurality of third grooves 1211. Among the plurality of third grooves 1211, they can be symmetrically distributed along the first direction, or symmetrically distributed along the second direction. Alternatively, some of the third grooves 1211 can be symmetrically distributed along the first direction while others are symmetrically distributed along the second direction. In this way, a portion of the material of the second connecting part 3 can be embedded into the plurality of third grooves 1211, thereby improving the connection stability between the second connecting part 3 and the base part 1. Furthermore, it can make the connection between the second connecting part 3 and the base part 1 more uniform and stable.

[0046] In some specific embodiments, the second recessed area 121 can be four third grooves 1211 spaced apart at the four corners of the second end 12. A portion of the material of the second connecting part 3 can be embedded in each of the four third grooves 1211, thereby improving the connection stability between the second connecting part 3 and the base part 1. Furthermore, the four third grooves 1211 are arranged separately, so that the second connecting part 3 is embedded at each of the four corners of the second end 12 of the base part 1, making the connection between the second connecting part 3 and the base part 1 more uniform and stable.

[0047] It should be noted that the second recessed area 121 includes the third groove 1211. Therefore, the recessed direction of the third groove 1211 is the same as the recessed direction of the second recessed area 121, which will not be elaborated here.

[0048] In some specific embodiments, the skeleton structure has a first side 10 and a second side 20 arranged opposite to each other 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 are arranged opposite to each other along the first direction. The first side 10 may be provided with two third grooves 1211, and one of the third grooves 1211 may extend to the third side and the other third groove 1211 may extend to the fourth side. Similarly, the second side 20 may be provided with two third grooves 1211, and the two third grooves 1211 extend to the third side and the fourth side respectively, which can improve the connection stability between the second connecting part 3 and the base part 1.

[0049] Furthermore, in some embodiments, the base portion 1 is also 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, with a portion of the material of the first connecting portion 2 embedded in the first positioning hole 15 and a portion of the material of the second connecting portion 3 embedded in the second positioning hole 16.

[0050] Specifically, by embedding a portion of the material of the first connecting part 2 into the first positioning hole 15, the connection stability between the first connecting part 2 and the base part 1 can be improved, preventing relative displacement between the base part 1 and the first connecting part 2, and improving the stability of the skeleton structure; by embedding a portion of the material of the second connecting part 3 into the second positioning hole 16, the connection stability between the second connecting part 3 and the base part 1 can be improved, preventing relative displacement between the base part 1 and the second connecting part 3, and improving the stability of the skeleton structure.

[0051] In some specific embodiments, the skeleton structure has a first side 10 and a second side 20 arranged opposite to each other 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 are arranged opposite to each other 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, while the first positioning hole 15 and the second positioning hole 16 can be mainly arranged on the third side and the fourth side. In this way, the connection between the first connecting part 2 and the base part 1, and the second connecting part 3 and the base part 1 can be strengthened, thereby improving the structural stability of the skeleton structure.

[0052] Furthermore, in some embodiments, the base portion 1 includes a main body portion 101 and two arcuate portions 102 respectively connected to the two ends of the main body portion 101 along the axial direction, and a winding region 13 is formed in the main body portion 101; the arcuate portions 102 bend and extend outward from the cavity 100 in the radial direction of the base portion 1; at least a portion of the first recessed region 111 and / or at least a portion of the second recessed region 121 extend from the arcuate portion 102 to the main body portion 101.

[0053] Specifically, the main body 101 of the base portion 1 is mainly cylindrical in shape, and arc-shaped portions 102 are formed by bending outwards at both ends of the main body 101 along the axial direction. That is, the first end 11 and the second end 12 of the base portion 1 are two arc-shaped portions 102. Therefore, one arc-shaped portion 102 can be connected to the first connecting portion 2, so that there is a multi-directional interaction force between the first connecting portion 2 and the corresponding arc-shaped portion 102, which can improve the connection stability between the first connecting portion 2 and the base portion 1; the other arc-shaped portion 102 can be connected to the second connecting portion 3, so that there is a multi-directional interaction force between the second connecting portion 3 and the corresponding arc-shaped portion 102, which can also improve the connection stability between the second connecting portion 3 and the base portion 1.

[0054] Furthermore, it is understood that the first recessed area 111 is formed at the edge of the first end 11, thus indicating that the first recessed area 111 is at least partially disposed in one of the arcuate portions 102. Similarly, the second recessed area 121 is formed at the edge of the second end 12, thus the second recessed area 121 is at least partially disposed in the other arcuate portion 102. In some specific embodiments, the first recessed area 111 extends a distance from one of the arcuate portions 102 toward the main body portion 101, and the second recessed area 121 extends a distance from the edge of the other arcuate portion 102 toward the main body portion 101. This facilitates a firm connection between the first connecting portion 2 and the base portion 1, and between the second connecting portion 3 and the base portion 1.

[0055] In some specific embodiments, the first connecting portion 2 is disposed at the first end 11 of the base portion 1 and surrounds the outer periphery of the base portion 1; furthermore, the first connecting portion 2 protrudes outward relative to the outer periphery of the base portion 1 along the radial direction of the base portion 1, thereby further improving the connection stability of the first connecting portion 2 in the base portion 1. Similarly, the second connecting portion 3 is disposed at the second end 12 of the base portion 1 and surrounds the outer periphery of the base portion 1; furthermore, the second connecting portion 3 protrudes outward relative to the outer periphery of the base portion 1 along the radial direction, thereby further improving the connection stability of the second connecting portion 3 in the base portion 1.

[0056] A second aspect of this invention provides a manufacturing method for manufacturing a skeleton structure; the manufacturing method includes:

[0057] Step 1: Manufacture the base part 1 using a stamping process;

[0058] Step 2: Provide a mold, place the base part 1 inside the mold, and leave a glue injection port between the base part 1 and the mold;

[0059] Step 3: Inject the raw materials of the first connecting part 2 and the second connecting part 3 into the glue dispensing nozzle to form the first connecting part 2 at the first end 11 of the base part 1 and the second connecting part 3 at the second end 12 of the base part 1 to form a skeleton structure.

[0060] Specifically, the base portion 1 is manufactured through a stamping process. Since the outer periphery of the base portion 1 can serve as the winding area 13, it is unnecessary to process too many complex feature points on the stamping plane, simplifying the stamping process, ensuring accuracy, improving the consistency of the base portion 1, and enabling mass production of the base portion 1. Furthermore, during injection molding, the mold and the base portion 1 can be used as a medium. By pre-reserving a sprue between the mold and the base portion 1, the raw materials for the first connecting portion 2 and the second connecting portion 3 can be injected through the sprue, thereby forming the first connecting portion 2 at the first end 11 of the base portion 1 and the second connecting portion 3 at the second end 12 of the base portion 1. Since the injection molding process does not require a sintering process, large dimensional fluctuations in the first connecting portion 2 and the second connecting portion 3 can be prevented, ensuring structural accuracy and consistency, and enabling mass production of the first connecting portion 2 and the second connecting portion 3. Therefore, this embodiment of the invention, by combining stamping and injection molding processes, can reduce manufacturing difficulty, improve structural accuracy, and achieve mass production of the skeleton structure.

[0061] For example, the base part 1 can be made of copper or stainless steel; the raw materials of the first connecting part 2 and the second connecting part 3 can be plastic.

[0062] Furthermore, in some embodiments, a glue-applying opening is provided between the base portion 1 and the mold in step 2, specifically including: a first glue-applying opening 210 is provided between the mold and the first end 11, so that the first glue-applying opening 210 is formed in the mating area 21; a second glue-applying opening 30 is provided between the mold and the second end 12, so that the second glue-applying opening 30 is formed at one end of the second connecting portion 3 along the axial direction close to the base portion 1.

[0063] Specifically, a first injection port 210 exists between the mold and the first end 11 of the base portion 1. When injection molding the first connecting portion 2, the raw material of the first connecting portion 2 can be injected through the first injection port 210, thereby forming the first connecting portion 2 at the first end 11. Furthermore, after removing the mold, the structure of the first injection port 210 is formed in the mating area 21 of the first connecting portion 2. Similarly, a second injection port 30 exists between the mold and the second end 12 of the base portion 1. When injection molding the second connecting portion 3, the raw material of the second connecting portion 3 can be injected through the second injection port 30, thereby forming the second connecting portion 3 at the second end 12. Furthermore, after removing the mold, the structure of the second injection port 30 is formed at the axial end of the second connecting portion 3 near the base portion 1.

[0064] In some specific embodiments, the first glue-applying opening 210 formed in the mating region 21 includes a body portion protruding from the mating region 21, and a groove is formed recessed inward from the surface of the body portion. Similarly, the second glue-applying opening 30 is formed recessed inward from the surface of the second connecting portion 3.

[0065] Furthermore, in some embodiments, the skeleton structure can be used to connect with the housing, and the skeleton structure and the housing can together serve as the stator of the motor. For example, a plurality of circumferentially spaced glue inlets 1000 are provided at the end of the first connecting portion 2 away from the base portion 1, and a plurality of circumferentially spaced glue inlets 1000 are provided at the other end of the second connecting portion 3 away from the base portion 1. During assembly of the skeleton structure and the housing, glue can be injected through the glue inlets 1000 to bond the skeleton structure and the housing. By providing multiple glue inlets, the connection between the skeleton structure and the housing can be made more uniform and secure.

[0066] The above description is merely an embodiment of the present invention. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements all fall within the protection scope of the present invention.

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 distance between the two sidewalls of the first groove along the second direction is greater than the sum of the distances between the two sidewalls of the plurality of second grooves along the second direction; the distances between the two sidewalls of the plurality of second grooves along the second direction 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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