Stator and motor having the same

Abstract

The present invention provides a stator and a motor having the same. The stator includes a stator body, a boot body and a boot foot, the boot foot is connected to the stator body through the boot body, the boot foot includes two side surfaces, each side surface includes: a first plane, connected to the boot body, the first plane is a triangular plane; a second plane, the first side of the second plane is connected to the first plane; a third plane, the second side of the second plane is connected to the third plane, and the second plane and the third plane are arranged at an angle; a fourth plane, the third side of the fourth plane is connected to the second plane through the third plane, and the fourth side of the fourth plane is located in the bottom surface of the boot foot away from the boot body; wherein the third side and the fourth side are arranged parallel to each other and the distance between the two is L1, the first side and the second side are arranged parallel to each other and the distance between the two is L2, and L1 and L2 satisfy the relationship of #imgabs0#. The present invention solves the problem that the servo motor in the prior art has low precision and cannot meet the user's use requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a stator and a motor having the same. Background Art

[0002] At present, with the rapid development of intelligent equipment such as robots, the market has higher and higher requirements for the precision of servo motors. Among them, the slot torque is a key indicator affecting the precision of servo motors. The slot torque is the torque generated by the interaction between the permanent magnet and the stator core when the permanent magnet motor winding is not energized. It is caused by the fluctuation of the tangential component of the interaction between the permanent magnet and the stator teeth.

[0003] In the prior art, the winding slots of the stator of the servo motor are straight slots or oblique slots, and the size relationship between the winding slots and the stator teeth is not limited, resulting in a large tooth torque of the servo motor, reducing the accuracy of the servo motor and failing to meet user requirements. Summary of the invention

[0004] The main purpose of the present invention is to provide a stator and a motor having the same, so as to solve the problem that the servo motor in the prior art has low precision and cannot meet the user's use requirements.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a stator is provided, including a stator body, a boot body and a boot foot, the boot foot is connected to the stator body through the boot body, the boot foot includes two side surfaces, each side surface includes: a first plane, connected to the boot body, the first plane is a triangular plane; a second plane, the first side of the second plane is connected to the first plane; a third plane, the second side of the second plane is connected to the third plane, and the second plane and the third plane are arranged at an angle; a fourth plane, the third side of the fourth plane is connected to the second plane through the third plane, and the fourth side of the fourth plane is located on the bottom surface of the boot foot away from the boot body; wherein the third side and the fourth side are arranged in parallel with each other and the distance between the two is L1, the first side and the second side are arranged in parallel with each other and the distance between the two is L2, and L1 and L2 meet relationship.

[0006] Furthermore, the fourth planes of two adjacent shoe feet are arranged parallel to each other and the distance between them is L4, so as to form a winding groove; the second planes of two adjacent shoe feet are arranged parallel to each other and the distance between them is L3, and L3 and L4 meet relationship.

[0007] Furthermore, the second plane and the fourth plane are arranged parallel to each other.

[0008] Furthermore, a connection between the fourth side and the bottom surface of the boot foot away from the boot body has a chamfer or a rounded corner.

[0009] Furthermore, a connection between the third side and the third plane has a chamfer or a rounded corner.

[0010] Furthermore, the second plane and the third plane are both quadrilateral planes.

[0011] Furthermore, the stator body is an arc segment or a cylinder, the fourth plane is a rectangular plane, the rectangular plane also includes a fifth side and a sixth side, the fifth side and the sixth side are arranged opposite to each other, and the extension direction of the fifth side is consistent with the radial direction of the stator body.

[0012] Furthermore, the stator body is an arc segment, there are multiple stator bodies, and the multiple arc segments surround to form a cylindrical structure, there are multiple boot bodies, and there are multiple boot feet, and the multiple boot bodies are arranged one-to-one with the multiple stator bodies; the multiple boot feet are arranged one-to-one with the multiple boot bodies.

[0013] Furthermore, the stator body is cylindrical, the boot body is arranged on the inner arm of the stator body, and the boot foot is located at one end of the boot body away from the stator body; wherein, there are multiple boot bodies, and the multiple boot bodies are arranged at intervals along the circumference of the stator body, and there are multiple boot feet, and the multiple boot feet are arranged one-to-one with the multiple boot bodies.

[0014] According to another aspect of the present invention, a motor is provided, comprising a stator and a rotor; wherein the stator is the stator described above.

[0015] By applying the technical solution of the present invention, each side surface of the boot foot includes a first plane, a second plane, a third plane and a fourth plane connected in sequence. The first side edge and the second side edge of the second plane are arranged parallel to each other and the distance between them is L2, the third side edge and the fourth side edge of the fourth plane are arranged parallel to each other and the distance between them is L1, and L1 and L2 satisfy In this case, the cogging torque of the motor is smaller and the precision is greater, thereby solving the problem that the servo motor in the prior art has low precision and cannot meet the user's needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 A front view of a first embodiment of a stator according to the present invention is shown;

[0018] Figure 2 Shows Figure 1 An enlarged schematic diagram of the stator at point A;

[0019] Figure 3 Shows Figure 1The coefficients in A graph showing the relationship between the motor's cogging torque and the motor's cogging torque;

[0020] Figure 4 Shows Figure 1 The coefficients in A graph showing the relationship between the motor's cogging torque and the motor's cogging torque;

[0021] Figure 5 A schematic diagram of the three-dimensional structure of a stator according to a second embodiment of the present invention is shown;

[0022] Figure 6 Shows Figure 5 An enlarged schematic diagram of the stator at B in FIG. 1 ; and

[0023] Figure 7 Shows Figure 5 Front view of the stator.

[0024] The above drawings include the following reference numerals:

[0025] 10. stator body; 11. boss bar; 12. groove bar; 20. boot body; 30. boot foot; 31. first plane; 32. second plane; 321. first side; 322. second side; 33. third plane; 34. fourth plane; 341. fifth side; 35. winding groove. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0028] In the present invention, unless otherwise specified, the directional words used, such as "up" and "down", usually refer to the directions shown in the drawings, or to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0029] In order to solve the problem in the prior art that the servo motor has low precision and cannot meet the needs of users, the present application provides a stator and a motor having the same.

[0030] Embodiment 1

[0031] like Figure 1 and Figure 2 As shown, the stator includes a stator body 10, a boot body 20 and a boot foot 30, the boot foot 30 is connected to the stator body 10 through the boot body 20, and the boot foot 30 includes two side surfaces, each of which includes a first plane 31, a second plane 32, a third plane 33 and a fourth plane 34. The first plane 31 is connected to the boot body 20, and the first plane 31 is a triangular plane. The first side 321 of the second plane 32 is connected to the first plane 31. The second side 322 of the second plane 32 is connected to the third plane 33, and the second plane 32 and the third plane 33 are arranged at an angle. The third side of the fourth plane 34 is connected to the second plane 32 through the third plane 33, and the fourth side of the fourth plane 34 is located in the bottom surface of the boot foot 30 away from the boot body 20. Among them, the third side and the fourth side are arranged in parallel to each other and the distance between the two is L1, the first side 321 and the second side 322 are arranged in parallel to each other and the distance between the two is L2, and L1 and L2 meet relationship.

[0032] By applying the technical solution of the present invention, each side surface of the boot foot includes a first plane, a second plane, a third plane and a fourth plane connected in sequence. The first side edge and the second side edge of the second plane are arranged parallel to each other and the distance between them is L2, the third side edge and the fourth side edge of the fourth plane are arranged parallel to each other and the distance between them is L1, and L1 and L2 satisfy In this case, the cogging torque of the motor is smaller and the precision is greater, thereby solving the problem that the servo motor in the prior art has low precision and cannot meet the user's needs.

[0033] In this embodiment, the above arrangement of the stator can effectively reduce the magnetic field energy fluctuation when the permanent magnet magnetic field passes through the winding slot 35, thereby reducing the cogging torque and improving the motor accuracy.

[0034] In this embodiment, In this way, the above arrangement minimizes the cogging torque of the motor and maximizes the precision, so that the motor meets the user's usage requirements.

[0035] It should be noted that the relationship between L1 and L2 is not limited to this and can be adjusted according to working conditions. or or or

[0036] Optionally, the fourth planes 34 of two adjacent shoe feet 30 are arranged parallel to each other and the distance between them is L4, so as to form a winding groove 35. The second planes 32 of two adjacent shoe feet 30 are arranged parallel to each other and the distance between them is L3, and L3 and L4 meet Thus, the above arrangement makes the cogging torque of the motor smaller and the precision greater, thereby solving the problem that the servo motor in the prior art has low precision and cannot meet the needs of users.

[0037] In this embodiment, In this way, the above arrangement minimizes the cogging torque of the motor and maximizes the precision, so that the motor meets the user's usage requirements.

[0038] It should be noted that the relationship between L3 and L4 is not limited to this and can be adjusted according to working conditions. or or

[0039] In this embodiment, the first plane 31 is an acute triangle, which includes a first acute angle, which is greater than or equal to 2° and less than or equal to 4°. The positions of the first acute angles of the first planes 31 on the two sides of the shoe foot 30 are different, and along the thickness direction of the stator, the two first acute angles are respectively arranged close to the two end faces of the stator.

[0040] In this embodiment, the second plane 32 and the fourth plane 34 are arranged parallel to each other. Thus, the above arrangement makes the structures of the second plane 32 and the fourth plane 34 simpler, easier to process and realize, and reduces the processing cost of the boot foot 30.

[0041] Optionally, the connection between the fourth side and the bottom surface of the boot foot 30 away from the boot body 20 has a chamfer or a rounded corner. In this way, the above arrangement can prevent the stator from having sharp edges and cutting or scratching the coil wound in the winding groove 35, thereby extending the service life of the motor and improving the reliability of the motor.

[0042] Optionally, the connection between the third side and the third plane 33 has a chamfer or a rounded corner. In this way, the above arrangement can prevent the stator from having sharp edges and cutting or scratching the coils wound in the winding slots 35, thereby extending the service life of the motor and improving the reliability of the motor.

[0043] In this embodiment, the second plane 32 and the third plane 33 are both quadrilateral planes. Specifically, the second plane 32 and the third plane 33 are both rectangular planes, so that the structures of the second plane 32 and the third plane 33 are simpler, easier to process and realize, and the processing cost of the stator is reduced.

[0044] Optionally, the stator body 10 is an arc segment or a cylindrical shape, the fourth plane 34 is a rectangular plane, the rectangular plane further includes a fifth side 341 and a sixth side, the fifth side 341 is arranged opposite to the sixth side, and the extension direction of the fifth side 341 is consistent with the radial direction of the stator body 10. In this way, the above arrangement makes the notch of the winding slot 35 rectangular, thereby reducing the width of the notch, further reducing the cogging torque, and improving the accuracy of the motor.

[0045] In this embodiment, the stator body 10 is cylindrical, the boot body 20 is arranged on the inner arm of the stator body 10, and the boot foot 30 is located at one end of the boot body 20 away from the stator body 10. There are multiple boot bodies 20, and the multiple boot bodies 20 are arranged at intervals along the circumference of the stator body 10. There are multiple boot feet 30, and the multiple boot feet 30 are arranged one by one corresponding to the multiple boot bodies 20. In this way, the above arrangement makes the processing of the stator more flexible, reduces the processing difficulty of the staff, and further reduces the processing cost of the motor.

[0046] The present application also provides a motor (not shown), comprising a stator and a rotor, wherein the stator is the above-mentioned stator.

[0047] Specifically, the cogging torque of the motor is related to the coefficient The relationship between Figure 3 As shown, the cogging torque increases with the coefficient The increase of shows a trend of decreasing first and then increasing. The minimum cogging torque is obtained when the value is between 0.2 and 0.4. The relationship between Figure 4 As shown, when the coefficient The cogging torque reaches its minimum value between 24 and 25.

[0048] Embodiment 2

[0049] The stator in the second embodiment is different from that in the first embodiment in that the structure of the stator body 10 is different.

[0050] like Figures 5 to 7 As shown, the stator body 10 is an arc segment, there are multiple stator bodies 10, multiple arc segments surround to form a cylindrical structure, there are multiple boot bodies 20, there are multiple boot feet 30, and multiple boot bodies 20 are arranged one-to-one with multiple stator bodies 10. Multiple boot feet 30 are arranged one-to-one with multiple boot bodies 20. Among them, each boot body 20 is located on one side of the center of the stator body 10. In this way, the stator is spliced ​​by multiple stator bodies 10, so that the disassembly and assembly of the stator is easier and simpler, and the difficulty of disassembly and assembly is reduced.

[0051] In this embodiment, the central axes of the stator bodies 10 are coaxially arranged, so that the splicing of the multiple stator bodies 10 is easier and simpler, and the difficulty of splicing is reduced.

[0052] like Figure 5 and Figure 7 A boss bar 11 and a groove bar 12 are respectively arranged on the two side surfaces of each stator body 10 for positioning between two adjacent stator bodies 10, thereby making the splicing of multiple stator bodies 10 more accurate and reducing the splicing difficulty of the staff.

[0053] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0054] The side surfaces of the boot foot include a first plane, a second plane, a third plane, and a fourth plane connected in sequence. The first side edge and the second side edge of the second plane are arranged parallel to each other and the distance between them is L2, the third side edge and the fourth side edge of the fourth plane are arranged parallel to each other and the distance between them is L1, and L1 and L2 satisfy In this case, the cogging torque of the motor is smaller and the precision is greater, thereby solving the problem that the servo motor in the prior art has low precision and cannot meet the user's needs.

[0055] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0056] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0057] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A stator, comprising a stator body (10), a boot body (20) and a boot foot (30), wherein the boot foot (30) is connected to the stator body (10) through the boot body (20), and the boot foot (30) comprises two side surfaces, characterized in that: Each of the aspects includes: A first plane (31), connected to the boot body (20), wherein the first plane (31) is a triangular plane; A second plane (32), wherein a first side edge (321) of the second plane (32) is connected to the first plane (31); a third plane (33), wherein the second side edge (322) of the second plane (32) is connected to the third plane (33), and the second plane (32) and the third plane (33) are arranged at an angle; a fourth plane (34), wherein a third side edge of the fourth plane (34) is connected to the second plane (32) via the third plane (33), and the fourth side edge of the fourth plane (34) is located within a bottom surface of the boot foot (30) away from the boot body (20); The third side and the fourth side are arranged parallel to each other and the distance between them is L1, the first side (321) and the second side (322) are arranged parallel to each other and the distance between them is L2, and L1 and L2 satisfy relationship.

2. The stator according to claim 1, characterized in that: The fourth planes (34) of two adjacent shoe feet (30) are arranged parallel to each other and the distance between them is L4, so as to form a winding groove (35); the second planes (32) of two adjacent shoe feet (30) are arranged parallel to each other and the distance between them is L3, and the distance between L3 and L4 satisfies relationship.

3. The stator according to claim 1, characterized in that: The second plane (32) and the fourth plane (34) are arranged parallel to each other.

4. The stator according to claim 1, characterized in that: The connection between the fourth side and the bottom surface of the boot foot (30) away from the boot body (20) has a chamfer or rounded corner.

5. The stator according to claim 1, characterized in that: A connection between the third side and the third plane (33) has a chamfer or a rounded corner.

6. The stator according to claim 1, characterized in that: The second plane (32) and the third plane (33) are both quadrilateral planes.

7. The stator according to claim 1, characterized in that: The stator body (10) is an arc segment or a cylindrical shape, the fourth plane (34) is a rectangular plane, the rectangular plane also includes a fifth side (341) and a sixth side, the fifth side (341) is arranged opposite to the sixth side, and the extension direction of the fifth side (341) is consistent with the radial direction of the stator body (10).

8. The stator according to claim 1, characterized in that: The stator body (10) is an arc segment, there are multiple stator bodies (10), and the multiple arc segments surround to form a cylindrical structure, there are multiple boot bodies (20), and there are multiple boot feet (30), and the multiple boot bodies (20) are arranged in a one-to-one correspondence with the multiple stator bodies (10); the multiple boot feet (30) are arranged in a one-to-one correspondence with the multiple boot bodies (20).

9. The stator according to claim 1, characterized in that: The stator body (10) is cylindrical, the boot body (20) is arranged on the inner arm of the stator body (10), and the boot foot (30) is located at one end of the boot body (20) away from the stator body (10); wherein, there are multiple boot bodies (20), and the multiple boot bodies (20) are arranged at intervals along the circumference of the stator body (10), and there are multiple boot feet (30), and the multiple boot feet (30) are arranged in a one-to-one correspondence with the multiple boot bodies (20).

10. A motor, characterized in that: It comprises a stator and a rotor; wherein the stator is the stator according to any one of claims 1 to 9.

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