Spliced stator, motor, robot and machine tool
The dovetail groove and protruding snap-fit design solves the roundness problem of spliced stators without external tooling, achieving high-precision splicing and efficient production.
Patent Information
- Application Number
- CN202423228555.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2034-12-26
AI Technical Summary
Without the use of external tooling, existing spliced stators cannot guarantee the roundness of the laminations after splicing, resulting in low production efficiency and increased process complexity.
The design employs dovetail grooves and protrusions, allowing adjacent laminations to be snapped together. The inner wall of the dovetail groove passes through the center line of the splicing stator, ensuring that the laminations cannot move relative to each other and improving splicing accuracy.
High-precision lamination splicing can be achieved without external tooling, reducing processing difficulty and production costs, and improving assembly efficiency and stator roundness.
Smart Images
Figure CN223809617U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to motor technical field, concretely relates to a kind of spliced stator, motor, robot and machine tool. BACKGROUND
[0002] The market size of servo motor keeps the trend of sustained growth, and the existing servo motor has been widely used in various aspects of production and life, especially in the direction of robot and machine tool, and its working principle is to convert voltage signal into speed and torque to drive control object.
[0003] In the prior art, the stator of servo motor is formed by splicing into a circle, that is, a spliced stator. The spliced stator is spliced into a circle by a plurality of punched sheets, and the roundness of the spliced stator directly affects the performance of the servo motor. Figure 5 and Figure 6 As shown in the drawings, the existing splicing method is to set arc-shaped protrusions 701 and arc-shaped grooves 702 on the punched sheets, and a plurality of punched sheets are sequentially clamped together into a circle through the protrusions 701 and the grooves 702. However, the iron core structure spliced by the punched sheets is difficult to splice into a circle, and it is necessary to sequentially splice the punched sheets using a matching tool. After splicing is completed, the stator roundness is large and needs to be treated with a hoop. Then, the binding work is performed, and after the process is completed, the hoop can be removed. This series of operations greatly increases the complexity of the overall process, resulting in a decrease in workshop production efficiency. If the hoop is not used for treatment, the roundness of the spliced stator is large, which does not meet the requirements.
[0004] How to ensure the roundness of the stator spliced by punched sheets without external tooling is a technical problem that needs to be solved at present. CONTENT OF THE UTILITY MODEL
[0005] Therefore, the utility model provides a spliced stator, motor, robot and machine tool, which can ensure the roundness of the stator spliced by punched sheets without external tooling.
[0006] The utility model provides a kind of spliced stator, including the punched sheet of mutual clamping into a circle, along the circumferential direction of the spliced stator, the punched sheet includes opposite first end and second end, the first end is provided with dovetail groove, the dovetail groove is along the axial direction of the spliced stator and penetrates the punched sheet;The inner wall surface of the dovetail groove includes bottom wall surface, the plane where the bottom wall surface is located passes through the center line of the spliced stator;The second end is provided with the protrusion that is adapted with the dovetail groove and is clamped into the dovetail groove.
[0007] In some embodiments, the inner wall surface of the dovetail groove further comprises a first plane and a second plane, the first plane is located outside the second plane in the radial direction of the spliced stator, the first plane is connected with the end surface of the first end through a first convex arc surface, and the second plane is connected with the end surface of the first end through a second convex arc surface.
[0008] In some embodiments, the inner wall surface of the dovetail groove further comprises a first concave arc surface and a second concave arc surface, the bottom wall surface is connected with the first plane through the first concave arc surface, and the bottom wall surface is connected with the second plane through the second concave arc surface.
[0009] In some embodiments, the plane where the end surface of the first end is located passes through the center line of the spliced stator.
[0010] In some embodiments, the plane where the end surface of the second end is located passes through the center line of the spliced stator.
[0011] In some embodiments, the convex protrusion is clamped into the dovetail groove.
[0012] The utility model also provides a motor, including the spliced stator.
[0013] The utility model also provides a robot, including the motor.
[0014] The utility model also provides a machine tool, including the motor.
[0015] The punch piece of the application is provided with a dovetail groove at the first end and a convex protrusion matched with the dovetail groove at the second end, and the two adjacent punch pieces are clamped together through the dovetail groove and the convex protrusion, that is, the dovetail groove at the first end of one punch piece is clamped together with the convex protrusion at the second end of the other punch piece, so that a plurality of punch pieces are spliced into a circle. Since the bottom wall surface of the dovetail groove is a plane and the convex protrusion is matched with the dovetail groove, except in the axial direction of the spliced stator, the two punch pieces clamped together cannot move relative to each other; the plane where the bottom wall surface of the inner wall surface of the dovetail groove passes through the center line of the spliced stator, which makes the splicing precision of the punch piece high, the roundness of the spliced stator is small, and the punch piece does not need to be limited by external tooling, simplifying the assembly process and improving the assembly precision and efficiency. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments or the prior art. The drawings in the following description are only exemplary, and for those skilled in the art, other implementation drawings can be obtained according to the provided drawings without creative labor.
[0017] Figure 1 is a punching sheet structure schematic diagram of the embodiment of the utility model;
[0018] Figure 2 is the embodiment of the utility model Figure 1 the enlarged view of A in the middle;
[0019] Figure 3 is the explosion view of the plurality of punching sheets of the embodiment of the utility model;
[0020] Figure 4 is the stator schematic diagram of the plurality of punching sheets spliced into a circle of the embodiment of the utility model;
[0021] Figure 5 is the punching sheet structure schematic diagram of the prior art;
[0022] Figure 6 is the radial appearance schematic diagram of the stator of the punching sheet of the prior art after being made into a circle;
[0023] The reference signs are:
[0024] 1, first end; 101, dovetail groove; 1011, first plane; 1012, second plane; 2, second end; 201, protrusion; 301, first convex arc surface; 302, second convex arc surface; 401, first concave arc surface; 402, second concave arc surface; 5, punching sheet; 6, bottom wall surface; 701, protruding block; 702, recess. DETAILED DESCRIPTION
[0025] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.
[0026] In the description of the utility model, it is understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship usually is based on the orientation or position relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, in the absence of the opposite statement, these orientation words do not indicate and imply that the indicated device or element must have a particular orientation or be constructed and operated in a particular orientation, therefore, it cannot be understood as the limitation on the protection scope of the utility model; the orientation words "inner, outer" refer to the inner and outer of the contour of each component itself.
[0027] For purposes of the description hereinafter, spatially relative terms, such as "above", "below", "up", "down", "right", "left", "vertical", "horizontal", "top", "bottom", "lateral", "longitudinal", "transverse", "forward", "rearward", "radial", "peripheral", "axial", "cylindrical", "tubular", "circular", "annular", "central", "radially outward", "radially inward", "upwardly", downwardly", "vertical", "horizontal", "upward", "downward", "leftward", "rightward", "front", "rear", "clockwise", "counter-clockwise", "interior", "exterior", and the like, can be used herein for ease of description to describe the elements as they are oriented in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if a device described herein is turned over, elements described as "above", "up", "top", "down", "bottom", "under", "below", "left", "right", "vertical", "horizontal", "front", "rear", "clockwise", "counter-clockwise", "interior", "exterior", etc. can then be oriented "below", "down", "bottom", "above", "up", "top", "left", "right", "vertical", "horizontal", "front", "rear", "clockwise", "counter-clockwise", "interior", "exterior", etc. in the alternative. Thus, the example terms "above" and "below" can encompass both orientations "above" and "below". The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
[0028] In addition, it needs to be explained that the use of the words "first", "second" and the like to define parts, only for the convenience of distinguishing the corresponding parts, if there is no further declaration, the above words have no special meaning, therefore cannot be understood as the limitation of the protection scope of the utility model.
[0029] With reference to the drawings, Figures 1-4 As shown in the drawings, a spliced stator includes punches 5 which are mutually clamped into a circle. Along the circumferential direction of the spliced stator, the punch 5 includes opposite first end 1 and second end 2. The first end 1 is provided with dovetail groove 101 which penetrates the punch 5 along the axial direction of the spliced stator. The inner wall surface of the dovetail groove 101 includes bottom wall surface 6, and the plane where the bottom wall surface 6 is located passes through the center line of the spliced stator. The second end 2 is provided with protrusion 201 which is adapted to the dovetail groove 101 and clamped into the dovetail groove 101.
[0030] The punch 5 of the present application is provided with dovetail groove 101 at the first end 1 and protrusion 201 which is adapted to the dovetail groove 101 at the second end 2. Two adjacent punches 5 are clamped together through the dovetail groove 101 and the protrusion 201. That is, the dovetail groove 101 of the first end 1 of one punch 5 and the protrusion 201 of the second end 2 of the other punch 5 are clamped together in the two adjacent punches 5, so that multiple punches 5 are spliced into a circle. Since the bottom wall surface 6 of the dovetail groove 101 is a plane and the protrusion 201 is adapted to the dovetail groove 101, the two punches 5 clamped together cannot move relative to each other except in the axial direction of the spliced stator. The plane where the bottom wall surface 6 of the inner wall surface of the dovetail groove 101 is located passes through the center line of the spliced stator, which makes the splicing precision of the punch 5 high and the roundness of the stator after being formed into a circle small. It is not necessary to use external fixtures to limit the punch 5, which simplifies the assembly process and improves the assembly precision and efficiency.
[0031] As the stator lamination 5, the lamination 5 further comprises: a tooth portion, a yoke portion, a dovetail groove 101 and a protrusion 201 are arranged on the tooth portion.
[0032] The roundness refers to the degree that the cross section of the workpiece approaches the theoretical circle. When the difference between the maximum radius and the minimum radius is 0, the roundness is 0. The measuring tool is a roundness gauge, and the purpose is to measure the roundness of the ring-shaped workpiece. That is, the smaller the roundness, the closer to the circle.
[0033] Preferably, as shown in Figure 1 and Figure 2 , the inner wall surface of the dovetail groove 101 further comprises a first plane 1011 and a second plane 1012. In the radial direction of the spliced stator, the first plane 1011 is located outside the second plane 1012. The first plane 1011 is connected with the end face of the first end 1 through a first convex arc surface 301, and the second plane 1012 is connected with the end face of the first end 1 through a second convex arc surface 302.
[0034] The first plane 1011 is connected with the end face of the first end 1 through the first convex arc surface 301, and the second plane 1012 is connected with the end face of the first end 1 through the second convex arc surface 302, which makes the inner wall surface of the dovetail groove 101 and the end face of the first end 1 smoothly transition, avoiding local stress being too large, improving the overall structural strength of the spliced stator, and reducing the processing difficulty, which is conducive to improving the production efficiency.
[0035] Preferably, as shown in Figure 1 and Figure 2 , the inner wall surface of the dovetail groove 101 further comprises a first concave arc surface 401 and a second concave arc surface 402. The bottom wall surface 6 is connected with the first plane 1011 through the first concave arc surface 401, and the bottom wall surface 6 is connected with the second plane 1012 through the second concave arc surface 402.
[0036] The bottom wall surface 6 is connected with the first plane 1011 through the first concave arc surface 401, and the bottom wall surface 6 is connected with the second plane 1012 through the second concave arc surface 402, which makes the inner wall surface of the dovetail groove 101 as a whole be a curved surface without sharp corner space, which is conducive to making the outer wall surface of the protrusion 201 closely fit with the inner wall surface of the dovetail groove 101. It is also conducive to reducing the processing difficulty.
[0037] Preferably, as shown in Figure 1 and Figure 2 , the plane where the end face of the first end 1 is located passes through the center line of the spliced stator.
[0038] The plane where the end face of the first end 1 is located passes through the center line of the spliced stator, which reduces the processing difficulty.
[0039] Preferably, as shown in Figure 1 and Figure 2As shown, the plane in which the end face of the second end 2 is located passes through the center line of the spliced stator.
[0040] The plane in which the end face of the second end 2 is located passes through the center line of the spliced stator, which on the one hand reduces the processing difficulty and on the other hand is conducive to the lamination of the second end 2 face and the first end 1 face, thereby improving the structural strength of the spliced stator.
[0041] Preferably, as shown in Figure 3 and Figure 4 As shown, the protrusion 201 is interference-fitted into the dovetail groove 101.
[0042] By interference-fitting the protrusion 201 into the dovetail groove 101, the protrusion 201 and the dovetail groove 101 can be fully laminated, so that the punched sheets 5 can be firmly connected together, thereby improving the firmness of the spliced stator, and further making the stator spliced into a circle form a closed (closed refers to that the inside of the spliced stator is not communicated with the outside through the combined surface between the protrusion 201 and the dovetail groove 101) cylindrical body.
[0043] The utility model provides a kind of motor, including the spliced stator described.
[0044] The improvement of the assembly precision of the spliced stator is conducive to improving the power and torque characteristics of the motor. The performance and stability of the motor will be further improved.
[0045] The utility model provides a kind of robot, including the motor described.
[0046] The working precision of the robot is improved by using the above motor.
[0047] The utility model provides a kind of machine tool, including the motor described.
[0048] The working precision of the machine tool is improved by using the above motor.
[0049] As a person skilled in the art would readily understand, the advantageous technical features of the above-mentioned modes can be freely combined and superimposed without conflict.
[0050] The above is only a preferred embodiment of the utility model, and does not limit the utility model. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model. The above is only a preferred embodiment of the utility model, and it should be pointed out that, for ordinary skilled persons in the technical field, without departing from the technical principle of the utility model, a number of improvements and modifications can be made, which should be regarded as the protection scope of the utility model.
Claims
1. A spliced stator comprising lamination pieces (5) which are mutually clamped into a circle, characterized in that, The punch piece (5) comprises a first end (1) and a second end (2) opposite to each other along the circumferential direction of the spliced stator, the first end (1) is provided with a dovetail groove (101) penetrating through the punch piece (5) along the axial direction of the spliced stator, the inner wall surface of the dovetail groove (101) comprises a bottom wall surface (6), the plane where the bottom wall surface (6) is located passes through the center line of the spliced stator, and the second end (2) is provided with a protrusion (201) which is adapted to the dovetail groove (101) and is clamped into the dovetail groove (101).
2. The spliced stator of claim 1, wherein, The inner wall surface of the dovetail groove (101) further comprises a first plane (1011) and a second plane (1012), the first plane (1011) is located outside the second plane (1012) in the radial direction of the spliced stator, the first plane (1011) is connected with the end surface of the first end (1) through a first convex arc surface (301), and the second plane (1012) is connected with the end surface of the first end (1) through a second convex arc surface (302).
3. The spliced stator of claim 2, wherein, The inner wall surface of the dovetail groove (101) further comprises a first concave arc surface (401) and a second concave arc surface (402), the bottom wall surface (6) is connected with the first plane (1011) through the first concave arc surface (401), and the bottom wall surface (6) is connected with the second plane (1012) through the second concave arc surface (402).
4. The spliced stator of claim 1, wherein, The plane where the end surface of the first end (1) is located passes through the center line of the spliced stator.
5. The spliced stator of claim 4, wherein, The plane where the end surface of the second end (2) is located passes through the center line of the spliced stator.
6. The spliced stator of any one of claims 1-5, wherein, The protrusion (201) is clamped into the dovetail groove (101) in an interference manner.
7. An electric machine characterized by The spliced stator according to any one of claims 1-6.
8. A robot, characterized in that The motor according to claim 7.
9. A machine tool, characterized by The motor according to claim 7.