Stator assembly tool

Abstract

The application relates to a stator assembling tool, which comprises a support, a pressing power mechanism arranged on the support, a positioning mechanism arranged on the support and below the pressing power mechanism, the positioning mechanism being used for positioning an integrated outer stator, and an inner supporting mechanism used for positioning an inner stator, the inner supporting mechanism being capable of being arranged in the positioning mechanism under the pressing of the pressing power mechanism, so that the inner stator and the outer stator complete the assembling operation. Only one positioning tool (such as the positioning mechanism) is needed to quickly and reliably position the stator, and the stator is not prone to loosening or displacement during the machining process. The tool cost is saved, the production cost is reduced, the tool debugging and operation time are saved, the production efficiency is greatly improved, the assembling quality of the inner stator and the outer stator is ensured, and the working performance and reliability of the stator assembly and the driving motor are ensured.

Description

Technical Field

[0001] This invention relates to the field of motor manufacturing technology, and in particular to a stator assembly tooling. Background Technology

[0002] In recent years, with the rapid and vigorous development of the new energy vehicle industry, users have also put forward higher requirements for new energy vehicles. As the main power source of new energy vehicles, the performance and reliability of the drive motor have a great impact on the vehicles. Among the drive motors, a very critical component is the stator assembly. The iron core of the stator assembly has two structural forms: integrated and split. The split type means that the yoke and teeth of the originally integrated stator are separated, that is, the stator includes two parts: the inner stator and the outer stator. The advantage of this is that it is easier to process and operate for continuous wave windings.

[0003] The manufacturing of stator assemblies involves the assembly process of the inner and outer stators. However, a large portion of existing outer stators also adopt a multi-piece split structure, which is prone to loosening during assembly, affecting the quality of the stator after the inner and outer stators are assembled. This also requires a large number of positioning fixtures, resulting in increased production costs and reduced production efficiency. Summary of the Invention

[0004] Therefore, it is necessary to provide a stator assembly tooling to solve the problems of poor quality, high production cost, and low production efficiency of existing internal and external stator assembly.

[0005] This application provides a stator assembly fixture, which includes:

[0006] support;

[0007] A press-fitting power mechanism, which is mounted on the bracket;

[0008] A positioning mechanism, mounted on the bracket and located below the press-fitting power mechanism, is used to position the outer stator of the integrated structure; and

[0009] An inner support mechanism is used to position the inner stator. The inner support mechanism can be installed into the positioning mechanism under the downward pressure of the press-fitting power mechanism so that the inner stator and the outer stator can be assembled together.

[0010] The stator assembly fixture described above is used in the processing of split-structure stators to assist in assembling the inner and outer stators into a single unit. Specifically, the integrated outer stator is first installed into the positioning mechanism and placed on a bracket. Then, the inner support mechanism is assembled with the inner stator and placed between the pressing power mechanism and the positioning mechanism. The axial alignment of the inner and outer stators outside the inner support mechanism is adjusted to ensure accuracy. Finally, the pressing power mechanism is activated to gradually insert the inner support mechanism into the positioning mechanism, thereby completing the assembly of the inner stator into the outer stator and obtaining the assembled stator. Compared to existing technologies, since the outer stator in this solution adopts an integrated structure, only one positioning fixture (such as the positioning mechanism in this case) is needed to quickly and reliably position it. Loosening or displacement is not likely to occur during processing, which not only saves tooling costs and reduces production costs, but also saves time spent on tooling debugging and operation, greatly improving production efficiency. In addition, it can also ensure the quality of the inner and outer stators being assembled, thereby helping to ensure the working performance and reliability of the stator assembly and drive motor.

[0011] The technical solution of this application will be further described below:

[0012] In one embodiment, the inner support mechanism includes an inner support base, an inner support power component, and an inner support execution component. The outer periphery of the inner support base is used to house the inner stator, and the outer periphery of the inner support base has an opening. The inner support execution component is movably installed inside the inner support base. The inner support power component is installed on the inner support base and can drive the inner support execution component to abut against the inner peripheral wall of the inner stator.

[0013] In one embodiment, the inner support power assembly includes a threaded sleeve, a threaded column, a push rod, and a push block. The threaded sleeve is mounted on the inner support seat, the threaded column is screwed into the threaded sleeve, and the push rod is slidably inserted into the threaded sleeve with one end connected to the threaded column and the other end extending out of the threaded sleeve and connected to the push block.

[0014] The push block is provided with a driving part, and the inner support execution component includes at least two inner support units arranged along the horizontal circumferential direction. The inner support unit is provided with a mating part, and the driving part can push against the mating part to make the inner support unit extend outward and move to abut against the inner circumferential wall of the inner stator.

[0015] In one embodiment, the driving part is configured as a first inclined surface, and the mating part is configured as a second inclined surface, wherein the first inclined surface and the second inclined surface are adapted to abut against each other.

[0016] In one embodiment, the internal support power assembly further includes a hanging ring, which is mounted on one end of the threaded post that extends out of the threaded sleeve.

[0017] In one embodiment, the inner support power assembly further includes a return spring, one end of which is fixed to the inner support base and the other end is connected to the inner support unit.

[0018] In one embodiment, the inner support power assembly further includes a guide post, which is mounted on the inner support base. The positioning mechanism includes a positioning block with a positioning hole, and one end of the guide post is inserted into the positioning hole.

[0019] In one embodiment, the positioning mechanism further includes a positioning seat with a positioning cavity, the positioning seat being mounted on the bracket, and the positioning cavity being used to accommodate the outer stator.

[0020] In one embodiment, the positioning mechanism further includes a pressure block, which is mounted on the positioning seat and can press against the outer periphery of the outer stator.

[0021] In one embodiment, the stator assembly tooling further includes a limiting block assembly, which is mounted on the outer periphery of the threaded column and located between the press-fitting power mechanism and the inner support mechanism. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is an isometric structural diagram of the stator assembly fixture according to an embodiment of this application;

[0025] Figure 2 This is a schematic diagram of the structure viewed from the front.

[0026] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure at point AA;

[0027] Figure 4 for Figure 1 A schematic diagram of the assembly of the inner support mechanism and the inner stator;

[0028] Figure 5 for Figure 4 A front view structural diagram;

[0029] Figure 6 for Figure 5 A schematic diagram of the cross-sectional structure at point BB.

[0030] Explanation of reference numerals in the attached figures:

[0031] 100. Stator assembly fixture; 10. Bracket; 20. Pressing power mechanism; 30. Positioning mechanism; 31. Positioning block; 32. Positioning seat; 33. Pressing block; 40. Internal support mechanism; 41. Internal support seat; 42. Internal support power assembly; 421. Threaded sleeve; 422. Threaded column; 423. Push rod; 424. Push block; 424a. First inclined surface; 425. Hanging ring; 426. Return spring; 427. Guide column; 43. Internal support execution assembly; 431. Internal support unit; 431a. Second inclined surface; 50. Limit block assembly; 200. Inner stator; 300. Outer stator. Detailed Implementation

[0032] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0033] like Figures 1 to 3 As shown in the illustration, a stator assembly fixture according to an embodiment of this application includes a bracket 10, a pressing power mechanism 20, a positioning mechanism 30, and an inner support mechanism 40. The bracket 10 is used to mount and integrate the pressing power mechanism 20, the positioning mechanism 30, and the inner support mechanism 40 to ensure the structural integrity of the stator assembly fixture and facilitate handling for changing work locations. In this embodiment, the bracket 10 is a horizontally circumferentially open semi-enclosed structure, facilitating loading and unloading operations.

[0034] The press-fitting power mechanism 20 is mounted on the bracket 10; the positioning mechanism 30 is mounted on the bracket 10 and located below the press-fitting power mechanism 20. The positioning mechanism 30 is used to position the outer stator 300 of the integrated structure; the inner support mechanism 40 is used to position the inner stator 200. The inner support mechanism 40 can be inserted into the positioning mechanism 30 under the downward pressure of the press-fitting power mechanism 20 so that the inner stator 200 and the outer stator 300 can complete the assembly operation.

[0035] In summary, implementing the technical solution of this embodiment will have the following beneficial effects: the stator assembly fixture described above is used in the processing of stators with a split structure to assist in assembling the inner stator 200 and the outer stator 300 into a whole. Specifically, firstly, the integrated outer stator 300 can be installed into the positioning mechanism 30 and placed on the bracket 10. Then, the inner support mechanism 40 and the inner stator 200 are assembled and placed between the pressing power mechanism 20 and the positioning mechanism 30. The axial alignment of the inner stator 200 and the outer stator 300 outside the inner support mechanism 40 is adjusted to ensure accuracy. Finally, the pressing power mechanism 20 is activated to gradually insert the inner support mechanism 40 into the positioning mechanism 30, thereby completing the assembly of the inner stator 200 into the outer stator 300 to obtain the assembled stator.

[0036] Compared to existing technologies, since the outer stator 300 in this solution adopts an integrated structure, only one positioning tool (such as the positioning mechanism 30 in this case) is needed to position it quickly and reliably. Loosening or displacement is not likely to occur during processing, which not only saves tooling costs and reduces production costs, but also saves tooling debugging and operation time, greatly improving production efficiency. In addition, it can also ensure the quality of the assembly of the inner stator 200 and the outer stator 300, thereby helping to ensure the working performance and reliability of the stator assembly and drive motor.

[0037] Please continue reading. Figures 4 to 6 In some embodiments, the inner support mechanism 40 includes an inner support base 41, an inner support power component 42, and an inner support execution component 43. The outer periphery of the inner support base 41 is used to house the inner stator 200, and the outer periphery of the inner support base 41 is provided with an opening. The inner support execution component 43 is movably installed inside the inner support base 41. The inner support power component 42 is installed on the inner support base 41 and can drive the inner support execution component 43 to abut against the inner peripheral wall of the inner stator 200.

[0038] The inner support base 41 is used to mount and support the inner support power assembly 42 and the inner support execution assembly 43. The inner support mechanism 40 is cylindrical in shape. In the initial state, the diameter of the support mechanism is smaller than the inner diameter of the inner stator 200, making it easy for the inner stator 200 to be fitted onto the outside of the support mechanism for pre-installation. Then, the inner support power assembly 42 starts and drives the inner support execution assembly 43 to move. The inner support execution assembly 43 then passes through the opening and extends horizontally towards the inner stator 200, eventually abutting tightly against the inner peripheral wall of the inner stator 200, thereby fixing the inner stator 200 from the inside out. This ensures that the inner support execution assembly 43 can generate a sufficiently large frictional force with the inner stator 200, which is greater than the frictional resistance between the inner stator 200 and the outer stator 300, guaranteeing that the inner support execution assembly 43 can be inserted into the positioning mechanism 30 under downward pressure, achieving smooth assembly of the inner stator 200 and the outer stator 300.

[0039] Specifically, in some embodiments, the inner support power assembly 42 includes a threaded sleeve 421, a threaded post 422, a push rod 423, and a push block 424. The threaded sleeve 421 is mounted on the inner support seat 41, the threaded post 422 is screwed into the threaded sleeve 421, the push rod 423 is slidably inserted into the threaded sleeve 421 and one end is connected to the threaded post 422, and the other end extends out of the threaded sleeve 421 and is connected to the push block 424. The push block 424 is provided with a driving part. The inner support execution assembly 43 includes at least two inner support units 431 arranged along the horizontal circumferential direction. The inner support unit 431 is provided with a mating part. The driving part can push against the mating part to make the inner support unit 431 extend outward and abut against the inner circumferential wall of the inner stator 200.

[0040] When the inner stator 200 needs to be internally supported and fixed, the drive threaded column 422 rotates in the first direction (e.g., clockwise). Through the action of the threaded pair transmission, the threaded column 422 will slide relative to the threaded sleeve 421 towards the interior of the inner support seat 41 (e.g., ...). Figure 6 (in the downward direction), so that the threaded column 422 can push the push rod 423 and the push block 424 to move down synchronously; the push block 424 squeezes the inner side of the inner support unit 431, forcing at least two inner support units 431 to extend outward synchronously and eventually abut against the inner peripheral wall of the inner stator 200 to generate friction, thereby achieving the effect of constraining and fixing the inner stator 200.

[0041] Specifically, the driving part is configured as a first inclined surface 424a, and the mating part is configured as a second inclined surface 431a, with the first inclined surface 424a and the second inclined surface 431a fitting together. The first inclined surface 424a and the second inclined surface 431a cooperate to form a wedge-tight structure, that is, as the push block 424 moves down continuously, the first inclined surface 424a slides relative to the second inclined surface 431a, which can generate a horizontal pushing force on the inner support unit 431, making it easier to push the inner support unit 431 and control the squeezing force applied by the inner support unit 431 to the inner stator 200, avoiding excessive inner support force that could cause deformation of the inner stator 200.

[0042] When it is necessary to loosen the inner stator 200 for easy removal, simply turn the threaded post 422 in the second direction (e.g., counterclockwise). The threaded post 422 drives the push rod 423 and the push block 424 to move upward, and the push block 424 releases the inner support unit 431. Furthermore, the inner support power assembly 42 also includes a return spring 426. One end of the return spring 426 is fixed to the inner support seat 41, and the other end is connected to the inner support unit 431. At this time, under the rebound force of the return spring 426, the inner support unit 431 can retract and move away from the inner stator 200, and the inner stator 200 will no longer be subject to the inner support force of the inner support unit 431.

[0043] Understandably, the pressing power mechanism 20 outputs axial pressure to the inner support mechanism 40 so that the inner support mechanism 40 can be pressed into the positioning mechanism 30, completing the assembly of the inner stator 200 and the outer stator 300. During this process, the inner support mechanism 40 is subjected to significant axial pressure. To ensure that the inner support mechanism 40 has sufficient rigidity to move strictly along the axial direction and smoothly insert into the positioning mechanism 30, the stator assembly fixture also includes a limiting block assembly 50. The limiting block assembly 50 is installed on the outer periphery of the threaded column 422 and is located between the pressing power mechanism 20 and the inner support mechanism 40. The limiting block assembly 50 is rigidly and movably connected to the threaded column 422, providing good guidance and limiting for the inner support mechanism 40 as a whole, while effectively increasing the rigidity of the inner support mechanism 40 and ensuring accurate axial movement of the inner support mechanism 40.

[0044] Based on the above embodiments, the inner support power assembly 42 further includes a hanging ring 425, which is installed on one end of the threaded post 422 that extends out of the threaded sleeve 421. The hanging ring 425 is engaged with the hollow structure on the limiting block assembly 50 to ensure a reliable connection between the inner support mechanism 40 and the limiting block assembly 50.

[0045] In some embodiments, the inner support power assembly 42 further includes a guide post 427, which is mounted on the inner support base 41. The positioning mechanism 30 includes a positioning block 31 with a positioning hole, and one end of the guide post 427 is inserted into the positioning hole. The guide post 427 is inserted into the positioning hole, which serves to pre-position the inner support mechanism 40 and ensure accurate axial alignment between the inner support mechanism 40 and the positioning mechanism 30.

[0046] Furthermore, the positioning mechanism 30 also includes a positioning seat 32, which has a positioning cavity. The positioning seat 32 is mounted on the bracket 10, and the positioning cavity is used to accommodate the outer stator 300. The positioning mechanism 30 also includes a pressure block 33, which is mounted on the positioning seat 32 and can press against the outer periphery of the outer stator 300. The positioning seat 32 and the pressure block 33 work together to effectively restrict the axial and radial degrees of freedom of the outer stator 300, so that the outer stator 300 will not loosen even if it is subjected to radial extrusion force from the inner stator 200 during assembly.

[0047] It should be noted that the inner stator 200 and outer stator 300 are tightly fitted together, making it very difficult to insert the inner stator 200 into the outer stator 300 under normal temperature conditions. Therefore, it is advisable to first place the outer stator 300, positioning seat 32, pressure block 33, etc., together in an oven and heat them to a certain temperature, such as 150°C, to create a thermal expansion effect. This will appropriately enlarge the inner diameter of the outer stator 300, making it easier to press the inner stator 200 into the outer stator 300, reducing the pressing difficulty and energy consumption, and improving safety.

[0048] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

[0050] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0052] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0053] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0054] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

Claims

1. A stator assembly tooling, characterized in that, include: support; A press-fitting power mechanism, which is mounted on the bracket; A positioning mechanism is mounted on the bracket and located below the press-fitting power mechanism. The positioning mechanism is used to position the outer stator of the integrated structure, wherein the outer stator is the yoke of the stator. An inner support mechanism is used to position the inner stator, which is the toothed part of the stator. The inner support mechanism can be installed into the positioning mechanism under the downward pressure of the press-fitting power mechanism so that the inner stator and the outer stator can complete the assembly operation. The internal support mechanism includes an internal support base, an internal support power assembly, and an internal support execution assembly. The outer periphery of the internal support base is used to accommodate the inner stator, and the outer periphery of the internal support base has an opening. The internal support execution assembly is movably installed inside the internal support base. The internal support power assembly is installed on the internal support base and can drive the internal support execution assembly to abut against the inner peripheral wall of the inner stator; and The inner support power assembly includes a threaded sleeve, a threaded column, a push rod, and a push block. The threaded sleeve is mounted on the inner support base, the threaded column is screwed into the threaded sleeve, and the push rod is slidably inserted into the threaded sleeve with one end connected to the threaded column and the other end extending out of the threaded sleeve and connected to the push block. The push block is provided with a driving part, and the inner support execution component includes at least two inner support units arranged along the horizontal circumferential direction. The inner support unit is provided with a mating part, and the driving part can push against the mating part to make the inner support unit extend outward and move to abut against the inner circumferential wall of the inner stator.

2. The stator assembly fixture according to claim 1, characterized in that, The driving part is configured as a first inclined surface, and the mating part is configured as a second inclined surface, wherein the first inclined surface and the second inclined surface are adapted to abut against each other.

3. The stator assembly fixture according to claim 1, characterized in that, The internal support power assembly also includes a hanging ring, which is installed at one end of the threaded post that extends out of the threaded sleeve.

4. The stator assembly fixture according to claim 1, characterized in that, The internal support power assembly also includes a return spring, one end of which is fixed to the internal support base and the other end is connected to the internal support unit.

5. The stator assembly fixture according to claim 1, characterized in that, The internal support power assembly also includes a guide column, which is mounted on the internal support base. The positioning mechanism includes a positioning block with a positioning hole, and one end of the guide column is inserted into the positioning hole.

6. The stator assembly fixture according to claim 5, characterized in that, The positioning mechanism further includes a positioning seat, which has a positioning cavity. The positioning seat is mounted on the bracket, and the positioning cavity is used to accommodate the outer stator.

7. The stator assembly fixture according to claim 6, characterized in that, The positioning mechanism further includes a pressure block, which is mounted on the positioning seat and can press against the outer periphery of the outer stator.

8. The stator assembly fixture according to claim 1, characterized in that, The stator assembly fixture also includes a limiting block assembly, which is installed on the outer periphery of the threaded column and located between the press-fitting power mechanism and the inner support mechanism.

Images