Novel servo motor stator structure
By designing a matching structure between the center ring and the positioning groove, the deformation problem when the inner stator is connected to the outer stator is solved, the electrical clearance is balanced, and the normal operation of the motor is ensured.
Patent Information
- Application Number
- CN202423104112.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-12-16
AI Technical Summary
In existing servo motors, when the inner stator is connected to the outer stator, manufacturing dimensional errors can cause deformation of the inner stator, affecting the balance of electrical clearance and causing abnormal noise.
A novel servo motor stator structure is designed, wherein the center of the inner stator is a central ring, the outer periphery is provided with inner stator teeth, the inner periphery of the outer stator is provided with positioning grooves, and the ends of the inner stator teeth are connected to the positioning grooves with gaps, allowing relative rotation. The internal stress is reduced and deformation is avoided through the mating structure between the inner stator and the outer stator.
This effectively avoids deformation during the connection process between the inner and outer stators, maintains a balanced electrical clearance, and ensures the normal operation of the motor.
Smart Images
Figure CN223567390U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to motor technical field, especially a novel servo motor stator structure. BACKGROUND
[0002] In prior art, the servo motor mainly comprises a stator and a rotor, wherein the rotor can rotate relative to the stator to convert electric energy into kinetic energy. In addition, the stator of some technologies is composed of an inner stator and an outer stator. The coil is wound on the surface of the inner stator teeth of the inner stator in advance, and then the inner stator and the outer stator are combined and connected to form the overall structure of the stator.
[0003] However, in actual production process, if there is a certain error in the manufacturing size of the inner stator, and if the length of the inner stator teeth is too long, when the inner stator is fixed and connected with the outer stator, the inner stator will be excessively constrained by the outer stator, which will cause the inner stator to be extruded and deformed towards the center of the inner stator, thus causing the electrical gap between the inner stator and the rotor to be unbalanced, and further causing abnormal noise of the motor during actual rotation. SUMMARY
[0004] The main purpose of the utility model is to provide a novel servo motor stator structure which can be rotated and shifted during the actual installation and connection of the inner stator and the outer stator, so as to avoid the structural deformation caused by the connection of the inner stator and the outer stator due to size problems, and to ensure the reliability of the connection between the inner stator and the outer stator and the normal operation of the motor.
[0005] To achieve the above purpose, the utility model provides a novel servo motor stator structure, which comprises an outer stator and an inner stator. The outer stator is provided with a receiving space inside to accommodate the inner stator. The center structure of the inner stator is a center ring, and a plurality of inner stator teeth are arranged on the outer periphery of the center ring in a circumferential direction. A plurality of positioning grooves are arranged on the inner periphery of the outer stator. When the inner stator and the outer stator are combined and connected, the end part of the inner stator tooth is connected with the part structure gap of the corresponding positioning groove.
[0006] Preferably, the inner surface of the positioning groove comprises a first concave surface and a first convex surface. The first concave surface is recessed towards the outside of the outer stator, and the first convex surface is protruded towards the center of the outer stator. The end part of the inner stator tooth is provided with a second convex surface and a third convex surface. The second convex surface is connected with the first concave surface in a matched manner, and the radius of the third convex surface is greater than that of the first convex surface.
[0007] Preferably, the inner stator is composed of a plurality of laminated sheets which are axially stacked and connected. The center ring inner hole edge of each laminated sheet is provided with a center positioning structure, and the inner stator teeth of each laminated sheet are provided with an outer positioning structure. When the upper and lower laminated sheets are axially stacked and connected, the connection directions of the center positioning structure and the outer positioning structure are opposite.
[0008] Preferably, the center positioning structure comprises a first connecting block connected with the center ring inner hole, and a second connecting block connected with the lower end of the first connecting block; when the upper and lower laminates are connected, the second connecting block of the upper laminate is fixedly connected with the first connecting block of the lower laminate.
[0009] Preferably, the outer positioning structure is formed by stamping a connecting piece upward in the middle of the inner stator tooth; when the upper and lower laminates are connected, the connecting piece of the lower laminate is fixedly connected with the connecting piece of the upper laminate.
[0010] Preferably, the upper and lower buckling housings are provided with accommodating spaces inside the upper and lower buckling housings, respectively, which are adapted to the outer shape contour of the inner stator; after the upper and lower buckling housings are buckled, the coil is wound around the surface of the upper and lower buckling housings.
[0011] Preferably, the outer side of the upper buckling housing and / or the lower buckling housing is provided with a limiting plate which limits the outward movement of the coil.
[0012] Preferably, the center ring is provided with a size increasing part between the adjacent two inner stator teeth; the width of the size increasing part gradually decreases from the middle to both sides; the middle position of the size increasing part is provided with a through hole containing an elastic body which simultaneously penetrates the laminates of all the inner stators in the axial direction.
[0013] The technical scheme of the utility model has the following advantages over the prior art:
[0014] The inner stator is accommodated in the accommodating space of the outer stator; the center structure of the inner stator is a center ring; the outer periphery of the center ring is circumferentially provided with a plurality of inner stator teeth; the inner periphery of the outer stator is provided with a plurality of positioning grooves; when the inner stator and the outer stator are combined and connected, the end part of the inner stator tooth is connected through the structural clearance between the corresponding positioning groove, the second convex surface of the inner stator and the first concave surface of the positioning groove are matched and relatively moved, and the contact position between the front end of the third convex surface of the inner stator and the first convex surface of the positioning groove is moved, so that the entire inner stator and the outer stator are relatively rotated; when the inner stator and the outer stator are completely connected, the internal stress between the inner stator and the outer stator is also reduced, thereby avoiding the deformation of the inner stator structure during the connection of the inner stator and the outer stator, and further affecting the unbalance of the electrical gap between the stator and the rotor. BRIEF DESCRIPTION OF DRAWINGS
[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced as follows. Obviously, the drawings described in the following description only represent some of the embodiments of the present application, and not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.
[0016] Figure 1 It is a connection state schematic diagram of the outer stator and the inner stator of the present application.
[0017] Figure 2 It is Figure 1 It is a partial enlarged view of A in the middle.
[0018] Figure 3 It is a structure sectional view after the upper and lower two laminations are connected.
[0019] Figure 4 It is a three-dimensional structure schematic diagram of the upper and lower snap-fit housings.
[0020] Explanation of reference numerals:
[0021] 1, outer stator; 11, accommodating space; 12, positioning groove; 2, inner stator; 21, center ring; 22, inner stator tooth; 201, lamination; 3, center positioning structure; 31, first connecting block; 32, second connecting block; 4, outer positioning structure; 41, connecting sheet; 5, upper snap-fit housing; 6, lower snap-fit housing; 7, snap-fit groove; 8, limiting plate; 9, size increasing part; 91, elastic body.
[0022] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION
[0023] The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments only represent some of the embodiments of the present application, and not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.
[0024] The present application provides a novel servo motor stator structure.
[0025] Please refer to Figures 1-4In the novel servo motor stator structure of the embodiment of the utility model, the outer stator 1 is internally provided with an accommodating space 11, the accommodating space 11 can be used for accommodating the inner stator 2, that is, the inner stator 2 can be connected with the accommodating space 11 inside the outer stator 1. Specifically, the center structure of the inner stator 2 of the utility model is a center ring 21, and a plurality of inner stator teeth 22 are circumferentially arranged on the outer periphery of the center ring 21, that is, the plurality of inner stator teeth 22 are arranged around the center ring 21 and the inner stator teeth 22 are arranged radially outward. In addition, the inner periphery surface of the outer stator 1 of the utility model is provided with a plurality of positioning grooves 12, and the number of the positioning grooves 12 is the same as that of the inner stator teeth 22, so that the inner stator teeth 22 are connected with the positioning grooves 12. In the actual application process, the inner stator 2 is connected with the outer stator 1 by pressure bonding, in order to avoid structural deformation of the inner stator 2 and the outer stator 1 during the pressure bonding process, the inner stator 2 tooth end part and the corresponding positioning groove 12 part structure are connected with a gap, and during the connection of the inner stator 2 and the outer stator 1, the inner stator 2 is deformed in the direction of the positioning groove 12.
[0026] Please refer to Figure 2 Specifically, the inner surface of the positioning groove 12 of the utility model comprises a first concave surface 121 and a first convex surface 122, wherein the first concave surface 121 is recessed towards the outside of the outer stator 1, and the first convex surface 122 is convexly arranged towards the center of the outer stator 1. At the same time, the end of the inner stator tooth 22 is provided with a second convex surface 221 and a third convex surface 222, wherein the second convex surface 221 of the inner stator tooth 22 is connected with the first concave surface 121 of the positioning groove 12 by mutual cooperation, and the third convex surface 222 of the inner stator tooth 22 is opposite to the first convex surface 122 of the positioning groove 12, and the radius of the third convex surface 222 is greater than that of the first convex surface 122, so that the front end position of the inner stator tooth 22 and the surface of the positioning groove 12 are connected in a line contact connection mode, and if the inner stator 2 is deformed by extrusion with the outer stator 1 during the extrusion connection process of the inner stator 2 and the outer stator 1, the second convex surface 221 of the inner stator 2 cooperates with the first concave surface 121 of the positioning groove 12 and moves relatively, and the contact point between the front end of the third convex surface 222 of the inner stator 2 and the first convex surface 122 of the positioning groove moves, so that the entire inner stator 2 and the outer stator 1 rotate relatively, so that when the inner stator 2 and the outer stator 1 are completely connected, the internal stress between the inner stator 2 and the outer stator 1 is also reduced, thereby avoiding deformation of the inner stator 2 structure during the connection process of the inner stator 2 and the outer stator 1, and further affecting the electrical gap imbalance between the stator and the rotor.
[0027] The inner stator 2 of the utility model is connected in axial direction by several laminations 201, and the inner hole edge of the center ring 21 of each lamination 201 is provided with a center positioning structure 3, and the middle part of the inner stator tooth 2 of each lamination 201 is provided with an outer positioning structure 4.
[0028] Specifically, the center positioning structure 3 of the utility model comprises a first connecting block 31 connected with the inner hole of the center ring 21, and the lower end of the first connecting block 31 is further connected with a second connecting block 32; when the upper and lower laminations 201 are connected, the second connecting block 32 of the upper lamination 201 is fixedly connected with the first connecting block 31 of the lower lamination 201.
[0029] Specifically, the outer positioning structure 4 of the utility model is formed by stamping a connecting piece 41 in the middle part of the inner stator tooth 22; when the upper and lower laminations 201 are connected, the connecting piece 41 of the lower lamination 201 is fixedly connected with the connecting piece 41 of the upper lamination 201.
[0030] Therefore, when the inner structure of the inner stator 2 is manufactured and connected, the two laminations 201 opposite to each other can be firstly connected in axial direction, and the two laminations 201 are connected by the same force through the center positioning structure 3. When the upper and lower inner stator teeth 22 are connected, a force in a direction different from the previous force is applied to connect the upper and lower inner stator teeth 22, and the connecting piece 41 of the lower lamination is clamped into the connecting piece of the upper lamination 201, so that the inner stator teeth 22 of the upper and lower laminations 201 can be connected through the outer positioning structure 4.
[0031] The utility model discloses an upper buckle shell 5 is equipped on the inner stator 2, and the lower buckle shell 6 is equipped below the inner stator 2, and the accommodating space of the inside of the upper buckle shell 5 and the lower buckle shell 6 is adapted to the contour of the inner stator 2, and after the upper buckle shell 5 and the lower buckle shell 6 are buckled to each other, the coil is wound on the surface of the upper buckle shell 5 and the lower buckle shell 6, and in the stator structure of the servo motor of the embodiment, before the inner stator 2 is fixedly connected with the outer stator 1, the upper buckle shell 5 is covered on the upper position of the inner stator 2, and the lower buckle shell 6 is covered on the lower position of the inner stator 2, and the position of the upper buckle shell 5 and the lower buckle shell 6 can be provided with a buckle structure, so that the upper buckle shell 5 and the lower buckle shell 6 can be buckled and connected conveniently through the corresponding buckle structure in the connecting process of the upper buckle shell 5 and the lower buckle shell 6. In addition, the upper buckle shell 5 and the lower buckle shell 6 are provided with the corresponding buckle groove 7, which can be covered on the surface of the inner stator tooth 22, that is, the upper buckle shell 5 and the lower buckle shell 7 can form the accommodating channel of the inner stator tooth 22.
[0032] Preferably, the upper buckle shell 5 and / or the lower buckle shell 6 is provided with a limiting plate 8 on the outer side, that is, the outer side of at least the upper buckle shell 5 or at least the lower buckle shell 6 is provided with the limiting plate 8, and in the actual production process, the coil is wound on the upper buckle shell 5 and the lower buckle shell 6 at the same time, and when the upper buckle shell 5 and the lower buckle shell 6 are buckled and connected to each other, the coil is wound on the surface of the upper buckle shell 5 and the lower buckle shell 6 at the same time, and by providing the corresponding limiting plate 8, the wound coil can be limited to move outward, so as to ensure the normal work of the whole motor.
[0033] In addition, the center ring 21 is provided with a size increasing part 9 between the two adjacent inner stator teeth 22, and the width of the size increasing part 9 gradually decreases from the middle to both sides, and the size increasing part 9 can avoid the phenomenon of magnetic leakage between the two adjacent inner stator teeth 22.
[0034] Preferably, the middle position of the size increasing part 9 is provided with a through hole, and the through hole contains an elastic body 91, and the elastic body 91 axially penetrates all the laminations 201 of the inner stator, since the inner structure of the inner stator 2 may be extruded and deformed during the connection between the inner stator 2 and the outer stator 1, and the through hole between the two adjacent inner stator teeth 22 can accommodate the deformation, and the through hole contains the elastic body 91, so that in the actual connection process, the inner structure of the inner stator 2 can be deformed adaptively, and after the inner stator 2 and the outer stator 1 are connected, the elastic body 91 arranged in the through hole deforms elastically to restore, so as to ensure that the inner stator 2 and the outer stator 1 maintain a stable connection relationship.
[0035] The above is only the preferred embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation made by using the utility model specification and drawings, or direct / indirect application in other related technical fields under the concept of the utility model is included in the patent protection range of the utility model.
Claims
1. A novel stator structure of a servo motor, characterized by, The outer stator is internally provided with a containing space containing the inner stator, the center structure of the inner stator is a center ring, the outer periphery of the center ring is circumferentially provided with a plurality of inner stator teeth, the inner periphery of the outer stator is provided with a plurality of positioning grooves, and the inner stator teeth end portions are connected with the corresponding positioning groove portions in a structure gap.
2. The novel servo motor stator structure of claim 1, wherein The inner surface of the positioning groove comprises a first concave surface and a first convex surface, the first concave surface is recessed towards the outer side of the outer stator, and the first convex surface is protruded towards the center of the outer stator; the inner stator tooth end portion is provided with a second convex surface and a third convex surface, the second convex surface is connected with the first concave surface in a mutual cooperation mode, and the radius of the third convex surface is greater than that of the first convex surface.
3. The novel servo motor stator structure of claim 1, wherein The inner stator is axially connected by a plurality of laminated sheets, the center ring inner hole edge of each sheet is provided with a center positioning structure, and the inner stator tooth middle portion of each sheet is provided with an outer positioning structure; when the upper and lower sheets are axially laminated and connected, the connection directions of the center positioning structure and the outer positioning structure are opposite.
4. The novel servo motor stator structure of claim 3, wherein The center positioning structure comprises a first connecting block connected with the center ring inner hole, and the first connecting block is further connected with a second connecting block at the lower end; when the upper and lower sheets are connected, the second connecting block of the upper sheet is fixedly connected with the first connecting block of the lower sheet.
5. The novel servo motor stator structure of claim 3, wherein The outer positioning structure is formed by stamping a connecting piece in the middle portion of the inner stator tooth upward; when the upper and lower sheets are laminated and connected, the connecting piece of the lower sheet is fixedly connected with the connecting piece of the upper sheet.
6. The novel servo motor stator structure of claim 1, wherein The upper inner stator is provided with an upper buckling shell, and the lower inner stator is provided with a lower buckling shell; the inner stator is provided with a containing space inside the upper buckling shell and the lower buckling shell, and the containing space is adapted to the outer shape contour of the inner stator; after the upper buckling shell and the lower buckling shell are buckled with each other, the coil is wound on the surface of the upper buckling shell and the lower buckling shell.
7. The novel servo motor stator structure of claim 6, wherein The outer side of the upper buckling shell and / or the lower buckling shell is provided with a limiting plate, and the limiting plate limits the outward movement of the coil.
8. The novel servo motor stator structure of claim 1, wherein The center ring between the adjacent two inner stator teeth is provided with a size increasing portion, the width of the size increasing portion gradually decreases from the middle to both sides, the middle position of the size increasing portion is provided with a through hole, the through hole contains an elastic body, and the elastic body simultaneously axially penetrates all the laminated sheets of the inner stator.