Stator core capable of adjusting cogging torque
By clamping stator helical teeth of different specifications onto the stator core teeth and enhancing the connection strength, the process difficulties and mold costs in adjusting the cogging torque of the stator core were solved, thus achieving stable motor performance and cost-effectiveness.
Patent Information
- Application Number
- CN202520125620.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-01-20
AI Technical Summary
When adjusting the cogging torque of the existing stator core, it is difficult to make the winding process for smaller cogging torques, and different cogging torques require multiple sets of molds, resulting in high costs.
Design an adjustable cogging torque stator core by snapping different specifications of stator helical teeth onto the stator teeth and using reinforcing parts to enhance the connection strength, thereby achieving the adaptation of different cogging torques and avoiding changes to the existing winding process.
Without changing the winding process, it achieves the adaptation of different cogging torques, reduces process difficulty and cost, reduces mold requirements, and reduces the electromagnetic noise of the motor.
Smart Images
Figure CN223829108U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a stator core technical field especially relates to a stator core of adjustable tooth slot torque. BACKGROUND
[0002] The brushless motor tooth slot torque has been a key performance of motor, and in the motor field, the tooth slot size has its application occasion, and some occasions need larger tooth slot torque as a locking function, and some occasions need very small tooth slot torque to ensure the stability of torque.
[0003] The size of tooth slot torque is often closely related to the stator core of brushless motor, and the commonly used adjustment method is to change the size of stator core slot, but once the slot is too small, it cannot be made by the inner winding process, the original production line cannot be used, and a new core structure such as splicing and rounding needs to be used to realize it, and the cost is very high.
[0004] In order to adapt to the requirement of different tooth slot torque size without changing the existing winding process, the application provides a stator core capable of adjusting tooth slot torque. UTILITY MODEL CONTENTS
[0005] Therefore, the utility model discloses a stator core capable of adjusting tooth slot torque to solve the problem that the existing stator core is difficult to wind in a small tooth slot, and also solves the problem that different tooth slot torques need to open multiple molds.
[0006] In order to achieve the above purpose, the utility model provides a stator core capable of adjusting tooth slot torque, which comprises a stator yoke, the stator yoke is annular, and a plurality of positioning grooves are arranged at equal intervals on the circumferential outer edge of the stator yoke, a plurality of stator tooth portions are integrally formed at equal intervals on the inside of the stator yoke, the stator tooth portions are used for supporting coil winding, a stator helical tooth portion is connected to one end of the stator tooth portion away from the stator yoke, so that after winding on the stator tooth portion is completed, the stator helical tooth portion can be connected to the stator tooth portion, and a reinforcing portion is arranged on the stator tooth portion, which is used for enhancing the firmness between the stator tooth portion and the stator helical tooth portion.
[0007] Preferably, the stator helical tooth portion is formed by rolling a plurality of stator helical teeth and a dovetail block one, the dovetail block one is fixedly connected to the end of the stator helical tooth, and a dovetail groove matched with the dovetail block one is arranged on the stator tooth portion.
[0008] Preferably, the stator helical tooth and the dovetail block one are arranged in an integral structure.
[0009] Preferably, the reinforcing part is formed by laminating the arc-shaped block and the dovetail block II, and the dovetail block II is fixedly connected to the arc-shaped block.
[0010] Preferably, the connecting part of the arc-shaped block and the dovetail block II is chamfered.
[0011] Preferably, the end of the stator helical tooth is arc-shaped, and the arc-shaped end of the stator helical tooth is matched with the chamfered connecting part of the arc-shaped block and the dovetail block II.
[0012] The utility model discloses a stator core of adjustable tooth slot torque, which can adapt to the requirements of different tooth slot torque sizes without changing the existing winding process by clamping different specifications of stator helical tooth parts on the stator tooth part.
[0013] In addition, by separating the stator tooth part from the stator helical tooth part, the stator helical tooth part formed by laminated rolling can be clamped into the mounting groove on the stator tooth part with the cooperation of external equipment after winding on the stator tooth part, that is, the stator helical tooth part is installed after winding, which solves the problems of difficult winding process for small tooth slot torque and the need for multiple molds for different tooth slot torque, greatly reducing the process difficulty and cost. BRIEF DESCRIPTION OF DRAWINGS
[0014] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, and obviously, the drawings in the following description are only the embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor.
[0015] Figure 1 It is a structural schematic diagram of the embodiment of the utility model;
[0016] Figure 2 It is a structural schematic diagram of the embodiment of the utility model Figure 1 It is a structural schematic diagram of the embodiment of the utility model
[0017] Figure 3 It is a structural schematic diagram of the reinforcing part of the embodiment of the utility model;
[0018] Figure 4 It is an enlarged view of the structure at A of the embodiment of the utility model;
[0019] Figure 5 It is an enlarged view of the structure at B of the embodiment of the utility model.
[0020] In the figure: 1, stator yoke part; 2, positioning groove; 3, stator tooth part; 4, stator skew tooth part; 41, stator skew tooth; 42, dovetail block one; 5, reinforcing part; 51, arc block; 52, dovetail block two. DETAILED DESCRIPTION
[0021] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be combined with specific embodiments, and referring to the drawings, the utility model is further explained in detail.
[0022] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the utility model should be understood as the usual meaning by the person skilled in the art to which the utility model belongs. The "first", "second" and similar words used in the utility model do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "containing" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connected" or "connected" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent the relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0023] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 A stator core capable of adjusting the slot torque, comprising a stator yoke part 1, the stator yoke part 1 is annular, and a plurality of positioning grooves 2 are equidistantly arranged on the circumferential outer edge of the stator yoke part 1. Through the arrangement of the positioning grooves 2, the stator core can be assembled with other components when it is applied to the stator. A plurality of stator tooth parts 3 are integrally formed equidistantly on the inner circumference of the stator yoke part 1. The stator yoke part 1 and the stator tooth part 3 are both made of silicon steel sheet which is laminated and rolled. The stator tooth part 3 is used to support the coil winding. A stator skew tooth part 4 is connected to the end of the stator tooth part 3 away from the stator yoke part 1. After winding is completed on the stator tooth part 3, the stator skew tooth part 4 can be connected to the stator tooth part 3. A reinforcing part 5 is arranged on the stator tooth part 3. The reinforcing part 5 is used to enhance the firmness between the stator tooth part 3 and the stator skew tooth part 4.
[0024] By connecting different specifications of the stator skew tooth part 4 to the stator tooth part 3, the requirements of different slot torque sizes can be met without changing the existing winding process. In addition, the connection strength between the stator tooth part 3 and the stator skew tooth part 4 is increased by the arrangement of the reinforcing part 5, so that the stator skew tooth part 4 can be more stably connected to the stator tooth part 3.
[0025] In a preferred embodiment of the utility model, the stator skew tooth part 4 is made by stacking and rolling multiple stator skew teeth 41 and dovetail block one 42, and the dovetail block one 42 is fixedly connected on the end of the stator skew tooth 41, and the dovetail groove matched with the dovetail block one 42 is formed on the stator tooth part 3.
[0026] When the winding on the stator tooth part 3 is completed, the dovetail block one 42 is aligned with the dovetail groove, and then under the pushing of external equipment, the stator skew tooth part 4 can be clamped into the stator tooth part 3, that is, the stator skew tooth part 4 is installed after winding, which solves the problem that the winding process in the small slot torque is difficult, and solves the problem that multiple molds are needed for different slot torques, greatly reducing the process difficulty and cost.
[0027] The stator skew tooth 41 and the dovetail block one 42 are integrally formed, and the integrally formed structure increases the firmness between the stator skew tooth 41 and the dovetail block one 42.
[0028] In another preferred embodiment of the utility model, the reinforcing part 5 is made by stacking and rolling multiple arc blocks 51 and dovetail block two 52, and the dovetail block two 52 is fixedly connected on the arc block 51, and the mounting groove matched with the dovetail block two 52 is formed on the side surface of the stator tooth part 3.
[0029] The connecting part of the arc block 51 and the dovetail block two 52 is chamfered, the end of the stator skew tooth 41 is arc-shaped, and the arc-shaped arrangement of the end of the stator skew tooth 41 is matched with the chamfer of the connecting part of the arc block 51 and the dovetail block two 52.
[0030] When the stator skew tooth part 4 is installed, the dovetail block two 52 is aligned with the mounting groove, and because the arc-shaped arrangement of the end of the stator skew tooth 41 is matched with the chamfer of the connecting part of the arc block 51 and the dovetail block two 52, the arc-shaped end of the stator skew tooth 41 is clamped into the connecting part of the arc block 51 and the dovetail block two 52 during the process of clamping the dovetail block two 52 into the mounting groove under the cooperation of external equipment, so that the connection strength between the stator skew tooth 41 and the stator tooth part 3 is increased; in addition, the arc block 51 can be clamped in the connecting part of the stator tooth part 3 and the stator skew tooth 41, so as to increase the width size of the stator skew tooth 41 at the connecting position of the stator tooth part 3 and the stator skew tooth 41, further increase the connection strength between the stator tooth part 3 and the stator skew tooth 41, thereby improving the structural strength of the stator tooth part 3 and the stator skew tooth 41, reducing the vibration of the tooth part caused by the radial electromagnetic force and the slot torque and the torque ripple, and reducing the electromagnetic noise of the motor.
[0031] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.
[0032] The embodiments of this utility model are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A stator core with adjustable cogging torque, comprising a stator yoke (1), the stator yoke (1) being annular, and having a plurality of positioning grooves (2) evenly spaced on its outer circumferential edge; and having a plurality of stator teeth (3) integrally formed evenly spaced on its inner circumferential surface, the stator teeth (3) being used to support coil windings, characterized in that, The stator tooth (3) is engaged with a stator helical tooth (4) at one end away from the stator yoke (1), so that after the winding is completed on the stator tooth (3), the stator helical tooth (4) can be engaged on the stator tooth (3), and the stator tooth (3) is also provided with a reinforcing part (5), which is used to enhance the firmness between the stator tooth (3) and the stator helical tooth (4).
2. The stator core with adjustable cogging torque according to claim 1, characterized in that, The stator helical tooth section (4) is formed by stacking and rolling multiple stator helical teeth (41) and dovetail block one (42), and the dovetail block one (42) is fixedly connected to the end of the stator helical teeth (41), and the stator tooth section (3) is provided with a dovetail groove that is compatible with the dovetail block one (42).
3. A stator core with adjustable cogging torque according to claim 2, characterized in that, The stator helical teeth (41) and the dovetail block (42) are integrally formed.
4. A stator core with adjustable cogging torque according to claim 2, characterized in that, The reinforcing part (5) is formed by stacking and rolling multiple arc blocks (51) and dovetail block two (52), and the dovetail block two (52) is fixedly connected to the arc blocks (51). The side of the stator tooth part (3) is provided with an installation groove that is compatible with the dovetail block two (52).
5. A stator core with adjustable cogging torque according to claim 4, characterized in that, The connection between the arc-shaped block (51) and the second dovetail block (52) is chamfered.
6. A stator core with adjustable cogging torque according to claim 5, characterized in that, The end of the stator helical tooth (41) is arc-shaped, and the arc-shaped end of the stator helical tooth (41) is adapted to the chamfer at the connection between the arc block (51) and the dovetail block (52).