Stator assembly and servo motor
By setting up glue filling holes that do not penetrate the outer ring edge on the ring circuit board of the servo motor, the problem of difficult potting glue operation is solved, and simpler operation and higher power density are achieved.
Patent Information
- Application Number
- CN202422133791.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-08-30
AI Technical Summary
In existing servo motors, the filling holes on the printed circuit board are partially covered because the outer periphery needs to be wrapped in insulating tape, which makes the filling glue operation difficult.
A stator assembly is designed, including a core assembly, a stator winding assembly and a stator terminal board. A glue filling hole is installed on the ring circuit board, but the glue filling hole does not penetrate the outer ring edge, thereby avoiding the covering of the insulating tape.
Make the glue filling holes work normally, simplify the potting operation, improve process manufacturing and the power density of the servo motor.
Smart Images
Figure CN223039717U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of servo motors, and particularly relates to a stator assembly and a servo motor. Background Art
[0002] At present, high power density is the market trend of servo motors; using a printed circuit board to realize the connection between each winding and the extraction of three-phase current is beneficial to realize the miniaturization of the motor and improve the process manufacturability; in order to solve the problems of the installation stability and heat generation of the printed circuit board, a potting adhesive is used to fill the gap between the printed circuit board and each winding.
[0003] For the convenience of potting, potting holes are opened on the outer peripheral side of the printed circuit board (as Figure 1 shown), but the potting holes opened in this way will be partially covered by the insulating tape wound around the outer periphery of the printed circuit board for insulation protection, thus affecting the normal use of the potting holes and making the operation of the potting adhesive difficult. Summary of the Utility Model
[0004] The main purpose of the utility model is to propose a stator assembly and a servo motor, aiming to solve the problem of difficult operation when potting the potting holes opened on the existing printed circuit board.
[0005] To achieve the above purpose, a stator assembly proposed by the utility model is used for a servo motor. The stator assembly includes an iron core assembly, a stator winding assembly, and a stator wiring board. The stator winding assembly is arranged inside the iron core assembly. A plurality of pins protrude from the stator winding assembly. The stator wiring board is arranged on the stator winding assembly. The stator wiring board includes:
[0006] A circular circuit board, having an inner ring edge and an outer ring edge, and pads for welding with the pins of the stator winding assembly are arranged on the outer ring edge;
[0007] Potting holes are arranged on the circular circuit board, and the potting holes do not penetrate the outer ring edge.
[0008] In one embodiment, the potting holes are arranged on the inner ring edge of the circular circuit board.
[0009] In one embodiment, the potting holes penetrate the inner ring edge.
[0010] In one embodiment, the number of the potting holes is multiple, and the multiple potting holes are arranged at intervals along the circumferential direction of the circular circuit board.
[0011] In one embodiment, at least part of the diameters of the potting holes are different.
[0012] In one embodiment, the number of the pads is multiple, and the multiple pads are arranged at intervals along the circumferential direction of the outer ring edge;
[0013] The multiple potting holes and the multiple pads are arranged staggeredly on the annular circuit board.
[0014] In one embodiment, a wiring terminal is further formed on the annular circuit board, and the wiring terminal is arranged between the inner ring edge and the outer ring edge of the annular circuit board.
[0015] In one embodiment, the minimum distance d between the wiring terminal and the pad is greater than 0.65 mm.
[0016] In one embodiment, the stator winding assembly is provided with an installation groove, and the stator winding assembly is detachably arranged in the iron core assembly through the installation groove.
[0017] The present utility model further provides a servo motor, including the stator assembly as described in the above embodiment.
[0018] The technical solution of the present utility model adopts the method of forming potting holes on the annular circuit board, and the potting holes do not penetrate through the outer ring edge of the annular circuit board. Since the potting holes do not penetrate through the outer ring edge of the annular circuit board, when the annular circuit board is welded to the pins of the stator winding assembly in the stator assembly through the pads arranged on the outer ring edge, and then the outer peripheral side of the annular circuit board is insulated and wrapped by using insulating tape. Since the potting holes are not arranged to penetrate through the outer ring edge of the annular circuit board, when the insulating tape is wound around the outer peripheral side of the annular circuit board, the potting holes will not be covered, so that the potting holes can be used normally, and further the potting operation is more convenient. Description of the Drawings
[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.
[0020] Figure 1 It is a schematic structural diagram of a stator wiring board provided by the prior art;
[0021] Figure 2 It is a schematic structural diagram of an embodiment of the stator wiring board provided by the present utility model;
[0022] Figure 3 It is a schematic structural diagram of another embodiment of the stator wiring board provided by the present utility model;
[0023] Figure 4 Schematic structural diagram of an embodiment of the stator assembly provided by the present utility model;
[0024] Figure 5 Schematic wiring principle diagram of a stator wiring board provided by the present utility model;
[0025] Figure 6 Another schematic wiring principle diagram of a stator wiring board provided by the present utility model;
[0026] Figure 7 Still another schematic wiring principle diagram of a stator wiring board provided by the present utility model.
[0027] Explanation of reference numerals in the drawings:
[0028] 1. Wiring terminal; 2. Pad; 3. Potting hole; 4. Stator winding assembly; 41. Pin; 5. Inner stator core; 6. Outer stator core; 7. Ring-shaped circuit board; 71. Inner ring edge; 72. Outer ring edge; 8. Notch.
[0029] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments
[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0031] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0032] In addition, if the embodiments of the present utility model involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, or scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or inability to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0033] The potting holes opened on the outer peripheral side of the printed circuit board (as Figure 1 shown), although they can solve the problem of potting glue between the printed circuit board and the winding, the potting holes opened in this way will be partially covered by the insulating tape wound around the outer periphery of the printed circuit board for insulation protection, thus affecting the normal use of the potting holes and making it difficult to perform the potting operation of the potting glue.
[0034] The present utility model provides a stator wiring board.
[0035] Please refer to Figure 2 and Figure 3 , in an embodiment of the present utility model, the stator assembly is for a servo motor. The stator assembly includes an iron core assembly, a stator winding assembly, and a stator wiring board. The stator winding assembly is disposed within the iron core assembly. A plurality of pins protrude from the stator winding assembly. The stator wiring board is disposed on the stator winding assembly. The stator wiring board includes an annular circuit board 7. The annular circuit board 7 has an inner ring edge 71 and an outer ring edge 72. The outer ring edge 72 is provided with pads 2 for soldering to the pins 41 of the stator winding assembly 4. The annular circuit board 7 is provided with potting holes 3, and the potting holes 3 do not penetrate the outer ring edge 72.
[0036] In this embodiment, the stator assembly includes an iron core assembly, a stator winding assembly 4, and a stator wiring board. The iron core assembly includes an inner stator iron core 5 and an outer stator iron core 6. The stator winding assembly 4 includes a stator winding and a stator plastic frame for winding conductors. The stator winding assembly 4 is disposed between the inner stator iron core 5 and the outer stator iron core 6, and the stator wiring board is disposed above the stator winding assembly 4 and is used to cover the stator winding assembly 4.
[0037] The technical solution of the present utility model adopts a potting hole 3 opened on the annular circuit board 7, and the potting hole 3 does not communicate with the outer ring edge 72 of the annular circuit board 7. Since the potting hole 3 does not communicate with the outer ring edge 72 of the annular circuit board 7, when the annular circuit board 7 is welded to the pin 41 of the stator winding assembly 4 in the stator assembly through the pad 2 provided on the outer ring edge 72, and then the outer peripheral side of the annular circuit board 7 is insulated and wrapped by using insulating tape. Since the potting hole 3 is not provided through the outer ring edge 72 of the annular circuit board 7, when insulating tape is wound around the outer peripheral side of the annular circuit board 7, it will not cover the potting hole 3, so that the potting hole 3 can be used normally. In this embodiment, the pad 2 can be opened through the outer ring edge 72 or provided through the outer ring edge 72. Specifically, reference can be made to Figure 2 and Figure 3 , and there are no excessive restrictions on the specific opening position of the pad 2. Secondly, in this embodiment, in order to make the annular circuit board 7 more conveniently arranged on the stator winding assembly 4, a notch 8 can also be opened on the outer ring edge 72 of the annular circuit board 7, and a convex column corresponding to the notch 8 is protrudingly provided on the stator winding assembly 4 at the same time, so that when the annular circuit board 7 is installed on the stator winding assembly 4, the two can be connected by plugging. Of course, there are no excessive restrictions on the position and number of the notches 8 opened.
[0038] The specific opening position of the potting hole 3 can be on the inner ring edge 71 of the annular circuit board 7, or can be provided through the inner ring edge 71, or can be provided at any position between the inner ring edge 71 and the outer ring edge 72. Of course, the above three setting methods can also be combined in pairs or all three can be combined at the same time, and there are no excessive restrictions on this.
[0039] In one embodiment, the potting hole 3 is provided on the inner ring edge 71 of the annular circuit board 7. In this embodiment, the potting hole 3 is provided on the inner ring edge 71 of the annular circuit board 7. The potting hole 3 can be provided through the inner ring edge 71 or can be provided close to the inner ring edge 71 without passing through the inner ring edge 71. Setting the potting hole 3 on the inner ring edge 71 of the annular circuit board 7 can reduce the influence on the wiring between the stator winding assemblies 4.
[0040] Specifically, as Figure 2 shown, the potting hole 3 is provided through the inner ring edge 71. In this embodiment, the potting hole 3 is provided through the inner ring edge 71. Such a setting can further reduce the influence on the wiring of the stator winding assembly 4 compared with the potting hole 3 opened close to the inner ring edge 71 in the above embodiment.
[0041] In another embodiment, as Figure 3As shown, the potting holes 3 are provided between the inner ring edge 71 and the outer ring edge 72 of the annular circuit board 7. In this embodiment, the potting holes 3 are provided between the inner ring edge 71 and the outer ring edge 72 of the annular circuit board 7. The potting holes 3 arranged in this way can also be the same as the potting holes 3 in the above embodiment, and can be free from the influence of the insulating tape wound around the outer periphery of the annular circuit board 7. During the potting operation, the potting glue can be poured into the gap between the annular circuit board 7 and the stator winding assembly 4 through the potting holes 3. Thus, the annular circuit board 7 can not only be stably arranged above the stator winding assembly 4, but also achieve the functions of optimizing heat dissipation and waterproofing.
[0042] In one embodiment, as Figures 2 to 4 shown, the number of the potting holes 3 is multiple, and the multiple potting holes 3 are arranged at intervals along the circumferential direction of the annular circuit board 7. In this embodiment, considering that it takes a lot of time for the potting glue to enter the gap between the annular circuit board 7 and the stator winding assembly 4 through a single potting hole 3, and the filling effect is relatively poor. Therefore, in this embodiment, in order to improve the potting efficiency, multiple potting holes 3 are provided, and the multiple potting holes 3 are arranged at intervals along the circumferential direction of the annular circuit board 7. Arranging the multiple potting holes 3 at intervals along the circumferential direction of the annular circuit board 7 can not only improve the potting efficiency during potting, but also ensure the stability of the structure of the annular circuit board 7 itself.
[0043] Specifically, as Figure 2 shown, the diameters of at least some of the potting holes 3 are different. In order to further improve the potting efficiency of the potting holes 3, in this embodiment, the diameters of adjacent potting holes 3 are set differently. For example, if one of the adjacent potting holes 3 has a larger diameter, the other has a smaller diameter. Such a setting is mainly considered for the comprehensive use effect of the annular circuit board 7 during use. If all the potting holes 3 have large apertures, although it is more beneficial for potting, it is not conducive to the wiring and heat dissipation of the annular circuit board 7; if all the potting holes 3 have small apertures, although it is beneficial to the wiring and heat dissipation of the annular circuit board 7, it is not conducive to the potting operation. Therefore, in this embodiment, adjacent potting holes 3 are arranged in a large-small pattern. In other embodiments, for example, when the potting holes 3 penetrate the inner ring edge 71, the opening size of the potting holes 3 at this time is limited with reference to the hole depth and aperture of the potting holes 3. Specifically, the diameter size of the potting holes 3 can be adjusted according to the tightness of the wiring when the annular circuit board 7 is actually put into use. When the wiring is tight, the diameter of the potting holes 3 can be reduced to reduce the impact on the wiring. On the contrary, when the wiring is relatively loose, the diameter of the potting holes 3 can be increased to facilitate the potting operation.
[0044] In one embodiment, as Figure 2As shown, the number of the pads 2 is multiple, and the multiple pads 2 are arranged at intervals along the circumferential direction of the outer ring edge 72; the multiple potting holes 3 and the multiple pads 2 are arranged staggeredly on the annular circuit board 7. To ensure that the annular circuit board 7 itself can still maintain a certain strength after opening multiple potting holes 3, in this embodiment, the multiple potting holes 3 and the pads 2 provided on the outer ring edge 72 are arranged in a staggered manner. The stagger in this embodiment means that a potting hole 3 is arranged at a position between two extension lines formed along the opening direction of two adjacent pads 2 on the annular circuit board 7. Such a setting can effectively increase the distance between the potting holes 3 and the pads 2, thereby achieving the purpose of enhancing the structural strength of the annular circuit board 7 itself.
[0045] In one embodiment, the multiple pads 2 are arranged symmetrically according to the center of the circle, and the resistance between the pads 2 located in the symmetrical positions is less than 0.01 ohm. By such a setting, the connection mode between the respective stator winding assemblies 4 can be realized, and the star-delta hybrid connection of the stator assembly can be realized by using the annular circuit board 7 for connection, which is beneficial to improving the winding coefficient.
[0046] In one embodiment, as Figures 2 to 4 shown, a wiring terminal 1 is further opened on the annular circuit board 7, and the wiring terminal 1 is arranged between the inner ring edge 71 and the outer ring edge 72 of the annular circuit board 7. In this embodiment, the annular circuit board 7 is further provided with a wiring terminal 1 for connecting the three-phase power of the motor, and this wiring terminal 1 is used to realize electrical connection with the stator winding assembly 4.
[0047] Specifically, as Figure 2 shown, the minimum distance d between the wiring terminal 1 and the pad 2 is greater than 0.65 mm. In this embodiment, the minimum distance d between the wiring terminal 1 and the pad 2 needs to be set greater than 0.65 mm. Such a setting can effectively simulate local overheating and ensure the reliability of the product.
[0048] In this embodiment, the inner stator core 5 is formed by laminating sun tooth punching sheets without notches, and the outer stator core 6 is formed by laminating yoke punching sheets in a ring shape.
[0049] In the embodiment of the present utility model, the stator winding assembly 4 is provided with an installation groove, and the stator winding assembly 4 is detachably arranged in the iron core assembly through the installation groove. In this embodiment, an installation groove is further arranged on the inner side of the stator winding assembly 4, and the stator winding assembly 4 can be assembled outside the inner stator core 5 through the installation groove. Of course, an installation groove can also be arranged on the outer side of the stator winding assembly 4, and the stator winding assembly 4 can be assembled inside the outer stator core 6 through the installation groove, and no excessive limitation is made thereto.
[0050] In the embodiment of the present utility model, the wiring mode of the stator assembly can refer to as Figures 5 to 7The connection is made in the following manner, and no excessive limitations are imposed on this.
[0051] The present utility model also proposes a servo motor, which includes a stator assembly. The specific structure of the stator assembly refers to the above embodiments. Since this servo motor adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated one by one here.
[0052] The above is only an exemplary embodiment of the present utility model, and does not limit the patent scope of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.
Claims
1. A stator assembly for a servo motor, characterized in that: The stator assembly includes an iron core assembly, a stator winding assembly and a stator terminal board. The stator winding assembly is arranged in the iron core assembly. A plurality of pins are protruding from the stator winding assembly. The stator terminal board is arranged on the stator winding assembly. The stator terminal board includes: An annular circuit board having an inner ring edge and an outer ring edge, wherein the outer ring edge is provided with a pad for welding with the pins of the stator winding assembly; The annular circuit board is provided with a glue injection hole, and the glue injection hole does not penetrate the outer ring edge.
2. The stator assembly according to claim 1, characterized in that The glue injection hole is arranged on the inner ring edge of the annular circuit board.
3. The stator assembly according to claim 2, characterized in that The glue injection hole is arranged through the inner ring edge.
4. The stator assembly according to claim 1, characterized in that There are multiple glue injection holes, and the multiple glue injection holes are arranged at intervals along the circumference of the annular circuit board.
5. The stator assembly according to claim 4, characterized in that At least some of the glue injection holes have different diameters.
6. The stator assembly according to claim 4, characterized in that There are multiple pads, and the pads are arranged at intervals along the circumference of the outer ring edge; The plurality of glue injection holes and the plurality of solder pads are arranged alternately on the annular circuit board.
7. The stator assembly according to any one of claims 1 to 6, characterized in that: The annular circuit board is also provided with a connection terminal, and the connection terminal is arranged between the inner ring edge and the outer ring edge of the annular circuit board.
8. The stator assembly according to claim 7, characterized in that The minimum distance d between the connection terminal and the pad is greater than 0.65 mm.
9. The stator assembly according to claim 1, characterized in that The stator winding assembly is provided with a mounting groove, and the stator winding assembly is detachably arranged in the core assembly through the mounting groove.
10. A servo motor, characterized in that: Comprising the stator assembly according to any one of claims 1 to 9.