A general magnet assembly mechanism for rotor casing

Abstract

This invention discloses a universal magnet assembly mechanism for rotor housings, belonging to the field of motor manufacturing. It includes a vertically arranged magnet guide shaft with multiple axial magnet guide grooves circumferentially arranged on its outer side wall; it also includes bottom, middle, and top layer pressing rings axially and sequentially movably sleeved outside the guide shaft, each pressing ring having an extended pressing arm extending into the magnet guide groove on its inner side wall, with a vertically downward-facing ejector pin fixed to the lower surface of the end of the extended pressing arm; it also includes a pressing drive module that drives the three layers of pressing rings to move asynchronously up and down, and a limiting module that inserts into the magnet guide grooves to radially limit the magnets. During pressing, the lower end of the guide shaft abuts against the rotor end face, and an external lifting mechanism drives the entire mechanism to descend, causing the magnets to rise relative to each other, sequentially triggering the bottom, middle, and top layer ejector pins, achieving layered and orderly pressing of multiple sets of magnets of different lengths. This invention has strong versatility, enabling multi-layer asynchronous and precise pressing of magnets, effectively preventing magnet skew and collision, and improving pressing quality and efficiency.

Description

Technical Field

[0001] This invention relates to the field of motor manufacturing technology, and in particular to a universal magnet assembly mechanism for rotor housing. Background Technology

[0002] In the production of permanent magnet motors, one of the core processes is the precise and efficient installation of long strip magnets into the magnet mounting slots of the rotor core or housing. The quality of magnet assembly directly affects the motor's performance, lifespan, and operational stability. With the increasing demands for motor performance in fields such as new energy vehicles and industrial servo motors, the number, arrangement, and length specifications of magnets are becoming increasingly complex. For example, to optimize the air gap magnetic field and reduce torque ripple, a segmented skewed pole design is often used, requiring multiple sets of magnets with different axial lengths to be press-fitted onto the same rotor core. Simultaneously, to accommodate motors of different power ratings, production lines need to frequently switch between producing rotors with different diameters and numbers of magnet slots.

[0003] Existing magnet assembly equipment mainly faces the following technical problems: First, it has poor versatility. Traditional equipment is usually designed for a single specification of rotor and a single length of magnet. When changing product models, a large number of guide and pressing parts need to be replaced, or even the entire machine needs to be replaced. The adjustment is cumbersome and costly, making it difficult to adapt to the needs of flexible production.

[0004] Secondly, multi-layer segmented pressing is difficult. For processes that require pressing magnets of different lengths in batches and layers within a rotor (such as pre-installing the bottom layer of magnets first, and then pressing the middle and top layers of magnets in sequence), existing mechanisms either require multiple machines or multiple processes to complete, resulting in multiple changes in the positioning reference and large cumulative errors; or the structure is complex, with mutual interference between multi-layer pressing actions, making it difficult to guarantee pressing accuracy and synchronization.

[0005] Third, magnets are prone to skewing or collision during the pressing process. Because magnets have strong magnetism and are brittle and hard, if the radial positioning is not firm or the guide gap is unreasonable when they fall along the guide groove or are pressed, the magnets are very likely to attract each other and deflect or collide with the groove wall, causing damage to the magnets or incomplete pressing, which affects the yield.

[0006] Fourth, the radial force control during pressing is poor. When the ejector pin pushes the magnet downward, it is prone to bending or radial displacement due to the reaction force. This problem is more prominent when pressing long or tight magnets, and it will further deteriorate the pressing accuracy.

[0007] Therefore, there is an urgent need to provide an automated assembly mechanism that can be universally used for different diameters and different numbers of magnet slots, and can achieve precise, stable, and asynchronous pressing of multiple layers and multiple groups of magnets of different lengths, in order to solve the above problems. Summary of the Invention

[0008] The purpose of this invention is to provide a universal magnet assembly mechanism for rotor housings to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a universal magnet assembly mechanism for rotor housing, comprising a vertically arranged magnet guide shaft, wherein a plurality of axially opened magnet guide grooves are evenly distributed circumferentially on the outer side wall of the magnet guide shaft; It also includes a bottom layer press-fit ring, a middle layer press-fit ring, and a top layer press-fit ring that are axially and sequentially movably sleeved on the outside of the magnet guide shaft. The inner sidewalls of the bottom layer press-fit ring, the middle layer press-fit ring, and the top layer press-fit ring are all provided with an extension press-fit arm that extends into the magnet guide groove. The lower surface of the end of the extension press-fit arm is fixed with a vertically downward-facing ejector pin. It also includes a press-fitting drive module that drives the bottom press-fitting ring, the middle press-fitting ring, and the top press-fitting ring to move asynchronously up and down; It also includes a limiting module for radially limiting the magnet inserted into the magnet guide groove.

[0010] The universal magnet assembly mechanism for rotor housing of the present invention, wherein the number of extended press-fit arms on the bottom press-fit ring and the middle press-fit ring is half the number of extended press-fit arms on the top press-fit ring, and the total number of the three is the same as the number of magnet guide grooves on the magnet guide shaft.

[0011] The universal magnet assembly mechanism for rotor housing of the present invention, wherein the two side walls of the extended pressing arm along the circumferential direction of the guide shaft slide against the two side walls of the magnet guide groove, and the length of the extended pressing arm along the radial direction of the guide shaft is greater than the depth of the magnet guide groove.

[0012] The universal magnet assembly mechanism for rotor housing of the present invention includes a limiting module comprising a positioning sleeve coaxially sleeved on the outside of the magnet guide shaft. The lower end of the inner wall of the positioning sleeve is integrally provided with an annular boss. The inner sidewall edge of the lower surface of the annular boss is coaxially and flush with an extension guide tube. The inner wall of the extension guide tube is flush with the inner wall of the annular boss and forms an annular limiting cavity with the outer sidewall of the magnet guide shaft to radially limit the ejector pin. During press fitting, the sidewall of the ejector pin away from the center of the magnet guide shaft slides against the outer annular sidewall of the annular limiting cavity.

[0013] The universal magnet assembly mechanism for rotor housing of the present invention includes an annular space between the inner wall of the positioning sleeve and the outer wall of the magnet guide shaft to form a press-fit guide cavity, wherein the bottom press-fit ring, the middle press-fit ring and the top press-fit ring are all longitudinally movable within the press-fit guide cavity.

[0014] The universal magnet assembly mechanism for rotor housing of the present invention includes a stop platform formed on the upper surface of the annular boss to stop the bottom press-fit ring.

[0015] The universal magnet assembly mechanism for rotor housing of the present invention includes a first drive shaft, a second drive shaft, and a third drive shaft that extend upward through the press-fit guide cavity on the upper surfaces of the bottom press-fit ring, the middle press-fit ring, and the top press-fit ring, respectively; the middle press-fit ring and the top press-fit ring each have a first movable hole for the first drive shaft to pass through, and the top press-fit ring also has a second movable hole for the second drive shaft to pass through; the first movable hole slides against the side wall of the first drive shaft, and the inner wall of the second movable hole slides against the side walls of the first drive shaft and the second drive shaft.

[0016] The universal magnet assembly mechanism for rotor housing of the present invention further includes a horizontally arranged mounting plate. The upper ends of the magnet guide shaft and the positioning sleeve are fixedly attached to the lower surface of the mounting plate. The mounting plate is provided with through holes for the first drive shaft, the second drive shaft, and the third drive shaft to pass through. The press-fit drive module is disposed on the upper surface of the mounting plate and drives the first drive shaft, the second drive shaft, and the third drive shaft to move asynchronously downward.

[0017] The universal magnet assembly mechanism for rotor housing of the present invention includes guide sleeves on the first drive shaft, the second drive shaft, and the third drive shaft, which are fixed on the mounting plate.

[0018] The universal magnet assembly mechanism for rotor housing of the present invention includes a press-fit drive module mounted above the mounting plate via a bracket connected to the mounting plate, and comprising a first drive unit, a second drive unit, and a third drive unit. There are two of each of the first and second drive shafts, and four of each of the three drive shafts. The two first drive shafts and the two second drive shafts are respectively located on the two extended ends of the two perpendicular diameters of the magnet guide shaft, and the four three drive shafts are arranged in a ring around the magnet guide shaft. The upper ends of the two first drive shafts are connected by a horizontal first connecting plate, and the upper ends of the two second drive shafts are connected by a horizontal second connecting plate. The second connecting plate is located above the first connecting plate and the two are perpendicular to each other. A horizontal square connecting plate is also provided on the upper side of the second connecting plate, and the four three drive shafts are all connected to the square connecting plate. The third driving unit is vertically positioned downwards on the vertical center line of the square plate and its movable terminal is connected to the square plate; there are two of each of the first driving unit and the second driving unit, with both first driving units vertically downwards and connected to both ends of the first connecting plate, and both second driving units vertically downwards and connected to both ends of the second connecting plate.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: By incorporating a guide shaft with circumferential magnet guide grooves, precise axial guidance is provided for the magnets, preventing circumferential deviation. The three independent pressing rings and their ejector pins, axially fitted together, combined with the asynchronous drive of the pressing drive module, provide the physical basis for a batch-by-batch, step-by-step pressing process: pre-pressing the bottom layer, then pressing the middle layer, and finally pressing the top layer. This solves the problem of sequential pressing of magnets of different lengths within the same station and stroke. The limiting module ensures that the magnets will not radially deflect or jump out of the guide grooves due to magnetic attraction before and during pressing, improving operational stability. The design of the guide shaft diameter being equal to the rotor diameter ensures coaxial contact and accurate positioning. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is an overall structural diagram of the present invention.

[0022] Figure 2 for Figure 1 Exploded view.

[0023] Figure 3 This is a side view of the present invention.

[0024] Figure 4 for Figure 3 AA sectional view.

[0025] Figure 5 for Figure 4 Enlarged view of a local structure. Detailed Implementation

[0026] The terms "first," "second," "third," and "fourth," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0027] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0028] "Multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0029] Furthermore, the directional terms such as "upper," "lower," "inner," "outer," "axial," "circumferential," and "radial" used below are based on the normal press-fit working state of the mechanism. That is, "lower" refers to the direction in which the magnetic guide shaft points vertically downward toward the rotor or housing, and vice versa.

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0031] like Figures 1 to 5 As shown, this embodiment provides a universal magnet assembly mechanism for rotor housing. This mechanism is applied in the automated assembly line of permanent magnet motors and is used to press strip magnets of different lengths (usually divided into a first length group, a second length group, and a third length group, corresponding to the bottom, middle, and top layers of magnets, respectively) into the magnet mounting slots of the rotor core or housing in a sequential, batch-by-batch, and precise manner.

[0032] The mechanism includes a vertically arranged magnetic guide shaft 1. The magnetic guide shaft 1 is a cylindrical structure, and its lower end face is configured such that, during press-fitting operations, an external overall lifting drive mechanism (such as a servo press or electric cylinder, not the core of this mechanism but providing overall lifting) drives the entire mechanism to descend until the lower end face of the magnetic guide shaft 1 is coaxial and tightly abuts against the upper end face of the rotor to be assembled. The outer diameter of the magnetic guide shaft 1 is precisely equal to the outer diameter of the rotor to ensure coaxial positioning.

[0033] On the outer wall of the magnet guide shaft 1, multiple axial (i.e., vertical) through-hole or semi-through-hole magnet guide slots 11 are evenly distributed circumferentially. The cross-sectional shape of the magnet guide slots 11 matches the cross-sectional shape of the strip magnet to be installed (usually rectangular), and their number is the same as the number of slots on the rotor where magnets need to be installed, such as 16 slots, 24 slots, or 32 slots. The magnet guide slots 11 are used to provide precise circumferential and radial restraint when the magnet falls or is compressed, preventing it from deflecting.

[0034] The mechanism also includes a bottom pressing ring 3, a middle pressing ring 4, and a top pressing ring 5, which are sequentially and movably fitted onto the outer side of the magnet guide shaft 1 from the inside out. These three pressing rings are all annular components, coaxially arranged with the magnet guide shaft 1, and each can slide independently up and down along the axial direction of the magnet guide shaft 1. The bottom pressing ring 3 is located at the bottom, the middle pressing ring 4 is located in the middle, and the top pressing ring 5 is located at the top.

[0035] Each pressing ring (3, 4, 5) has an integrally formed or fixedly installed extended pressing arm (31, 41, 51) extending towards the center (i.e., radially inward) on its inner sidewall. Each extended pressing arm extends into a corresponding magnet guide groove 11. A vertically downward ejector pin (32, 42, 52) is fixed to the lower surface of the end of each extended pressing arm (i.e., the end closest to the axis of the magnet guide shaft 1). The ejector pin is a slender cylinder or square column, and its lower end face is used to directly contact and push the upper end face of the magnet.

[0036] To address the issue of batch pressing of magnets of varying lengths and ensure balanced force distribution across all magnets during the pressing process, this embodiment optimizes the number of extended pressing arms on the three-layer pressing rings. Specifically, the number of extended pressing arms on the bottom pressing ring 3 and the middle pressing ring 4 is half the number of extended pressing arms on the top pressing ring 5. Furthermore, the sum of the extended pressing arms on the bottom pressing ring 3, the middle pressing ring 4, and the top pressing ring 5 is exactly equal to the total number of magnet guide grooves 11 on the magnet guide shaft 1. For example, if there are 16 magnet guide grooves 11, then the top pressing ring 5 has 8 extended pressing arms 51, while the bottom pressing ring 3 and the middle pressing ring 4 each have 4 extended pressing arms 31 and 41. In terms of circumferential distribution, the four ejector pins 32 of the bottom pressing ring 3, the four ejector pins 42 of the middle pressing ring 4, and the eight ejector pins 52 of the top pressing ring 5 are staggered, together covering all 16 magnet guide grooves 11. In this way, during the final pressing stage, all magnets can be pressed simultaneously by their corresponding ejector pins.

[0037] To ensure precise and vertical transmission of the pressing force and prevent jamming or wobbling of the extended pressing arms during sliding, the two side walls of the extended pressing arms (31, 41, 51) along the circumferential direction of the magnet guide shaft 1 form a sliding fit with the two side walls of the magnet guide groove 11 (i.e., clearance fit, allowing free sliding but without significant radial clearance). Simultaneously, the length of the extended pressing arms along the radial direction of the magnet guide shaft 1 is greater than the distance from the bottom of the magnet guide groove 11 to the axis of the guide shaft 1; that is, the end of the extended pressing arm extends beyond the bottom of the magnet guide groove 11 and is closer to the axis. This allows the ejector pin fixed to the lower surface of its end to act directly near the radial mid-section of the magnet, preventing the magnet from tilting under pressure due to an excessively long lever arm.

[0038] The mechanism also includes a limiting module for radially limiting the magnets inserted into the magnet guide groove 11 before and during pressing, preventing the magnets from jumping out of the guide groove or radially deflecting due to their strong magnetism. In this embodiment, the limiting module specifically includes a positioning sleeve 6 coaxially sleeved on the outside of the magnet guide shaft 1. The lower end of the inner wall of the positioning sleeve 6 is integrally provided with an inwardly protruding annular boss 61. An extension guide 62 extends downward coaxially and flush with the inner sidewall edge of the lower surface of the annular boss 61. The inner wall of the extension guide 62 is completely flush with the inner wall of the annular boss 61, and the outer diameter of the extension guide 62 is smaller than the inner diameter of the positioning sleeve 6. The extension guide 62 is inserted into the annular space between the magnet guide shaft 1 and the positioning sleeve 6. A narrow annular cavity is formed between the inner wall of the extension guide 62 and the outer sidewall of the magnet guide shaft 1, which is the annular limiting cavity 63. During the pressing operation, the lower ends of each ejector pin (32, 42, 52) extend downwards through the annular limiting cavity 63. Furthermore, the side wall of each ejector pin facing away from the center of the magnet guide shaft 1 (i.e., the radial outer wall) slides against the outer annular side wall of the annular limiting cavity 63 (i.e., the inner wall of the extension guide cylinder 62). This structure effectively provides an "external support guide rail" for each ejector pin, greatly enhancing its radial stiffness and preventing it from bending when pushing the magnet.

[0039] Furthermore, the annular space between the inner wall of the positioning sleeve 6 and the outer wall of the magnet guide shaft 1 forms a press-fit guide cavity 64. The bottom press-fit ring 3, the middle press-fit ring 4, and the top press-fit ring 5 are all longitudinally movable within this press-fit guide cavity 64. This cavity provides precise radial guidance for the three press-fit rings, ensuring their coaxiality with the magnet guide shaft 1. Simultaneously, the upper surface of the annular boss 61 forms a stop platform 611. When the bottom press-fit ring 3 moves downwards under the action of the press-fit drive module until its lower surface contacts the stop platform 611, the stroke of the bottom press-fit ring 3 is precisely locked. This position corresponds to the end point of the press-fit depth of the first batch (bottom layer) of magnets.

[0040] To achieve asynchronous driving of the three-layer pressing rings, this embodiment employs a sophisticated transmission structure. A first drive shaft 33 extending upwards is fixed to the upper surface of the bottom pressing ring 3, a second drive shaft 43 extending upwards is fixed to the upper surface of the middle pressing ring 4, and a third drive shaft 53 extending upwards is fixed to the upper surface of the top pressing ring 5. These drive shafts are all vertically aligned precision optical shafts that pass upwards through the pressing guide cavity 64 and extend above the mechanism.

[0041] To prevent interference between the drive shafts during movement, the middle layer press-fit ring 4 has a first movable hole 44 for the first drive shaft 33 to pass through, and the top layer press-fit ring 5 has a first movable hole 54 for the first drive shaft 33 to pass through and a second movable hole 55 for the second drive shaft 43 to pass through. The inner walls of the first movable holes 44 and 54 slide against the side wall of the first drive shaft 33, and the inner wall of the second movable hole 55 slides against the side wall of the second drive shaft 43. In this way, the first drive shaft 33 can pass through the middle layer press-fit ring 4 and the top layer press-fit ring 5 without obstruction, the second drive shaft 43 can pass through the top layer press-fit ring 5 without obstruction, while the third drive shaft 53 is only fixed to the top layer press-fit ring 5. The three sets of drive shafts do not interfere with each other and independently control their respective press-fit rings.

[0042] The mechanism also includes a horizontally positioned mounting plate 7. The upper ends of the magnetic guide shaft 1 and the positioning sleeve 6 are both fixed to the lower surface of the mounting plate 7 by flanges or screws. Through holes 71 are provided on the mounting plate 7 corresponding to the positions of the first drive shaft 33, the second drive shaft 43, and the third drive shaft 53 for them to pass through. The press-fit drive module 8 is integrally mounted on the upper surface of the mounting plate 7 and is connected to the first drive shaft 33, the second drive shaft 43, and the third drive shaft 53 respectively, for driving them to move asynchronously downwards.

[0043] To improve the guiding accuracy and smoothness of the drive shafts, a guide sleeve 9 is fitted between each drive shaft (33, 43, 53) and the through hole 71 of the mounting plate 7. The guide sleeve 9 is fixedly installed on the mounting plate 7. The drive shafts reciprocate linearly within the guide sleeve 9, resulting in low friction and no radial wobble.

[0044] To accommodate large-diameter rotors and ensure absolutely uniform force on the press-fit ring, the specific layout of the press-fit drive module 8 is optimized in this embodiment. The press-fit drive module 8 is mounted above the mounting plate 7 via a bracket 10, and includes a first drive unit 81, a second drive unit 82, and a third drive unit 83. The first drive unit 81, the second drive unit 82, and the third drive unit 83 are all precision electric cylinders or pneumatic cylinders, with their movable terminals facing vertically downwards.

[0045] In this embodiment, considering the rotor is circular, the drive shafts are arranged symmetrically. Specifically, there are two first drive shafts 33, two second drive shafts 43, and four third drive shafts 53. The two first drive shafts 33 are located on the extended lines at both ends of one diameter of the magnet guide shaft 1 (i.e., the left and right ends), and the two second drive shafts 43 are located on the extended lines at both ends of another perpendicular diameter of the magnet guide shaft 1 (i.e., the front and rear ends). The four third drive shafts 53 are evenly distributed in a ring array around the magnet guide shaft 1.

[0046] The upper ends of the two first drive shafts 33 are connected to a horizontal first connecting plate 84, enabling the two first drive shafts 33 to move in tandem. The upper ends of the two second drive shafts 43 are connected to a horizontal second connecting plate 85, which is located above the first connecting plate 84, and their projections on the horizontal plane are perpendicular (i.e., cross-shaped) to avoid motion interference. The upper ends of the four third drive shafts 53 are all connected to a horizontal square connecting plate 86.

[0047] The third drive unit 83 is vertically downward, and its movable terminal is connected to the vertical center line of the square connecting plate 86. There are two first drive units 81, each vertically downward, with its movable terminal connected to both ends of the first connecting plate 84. There are two second drive units 82, each vertically downward, with its movable terminal connected to both ends of the second connecting plate 85.

[0048] With the above layout, two first drive units 81 synchronously drive the first connecting plate 84, driving two first drive shafts 33 to evenly push the bottom pressing ring 3; two second drive units 82 synchronously drive the second connecting plate 85, driving two second drive shafts 43 to evenly push the middle pressing ring 4; and a third drive unit 83 synchronously drives four third drive shafts 53 through a square connecting plate 86 to evenly push the top pressing ring 5. This "multi-point balanced drive" structure effectively avoids the pressing rings tilting and jamming, and is especially suitable for rotors with large diameters and multiple magnet slots.

[0049] Actual working process Initial state: The entire mechanism is lifted to a high position by an external lifting mechanism. All pressing rings are at their top dead center. Manually or via a feeding mechanism, magnets of different lengths are pre-inserted into the magnet guide grooves 11 in groups: the first batch (bottom layer) of magnets (shortest length) is inserted at the bottom of the guide groove, the second batch (middle layer) of magnets is placed on top of the first batch, and the third batch (top layer) of magnets is placed at the very top. Due to the presence of the limiting module, especially the radial constraint of the annular limiting cavity 63 and the extended guide tube 62, all magnets, even those with strong magnetism, will not jump out of the guide groove or attract and deflect each other.

[0050] When pressing begins: the external lifting mechanism drives the entire mechanism to descend, so that the lower end face of the magnet guide shaft 1 abuts against the upper end face of the rotor.

[0051] Step 1 (Pre-installation of bottom layer magnets): The two first drive units 81 in the press-fit drive module 8 are activated, driving the bottom layer press-fit ring 3 downwards via the first connecting plate 84 and the first drive shaft 33. The four ejector pins 32 on the bottom layer press-fit ring 3 first contact and push the first batch of magnets in the corresponding guide slots downwards. Since the middle and top layer press-fit rings have not yet moved at this time, the magnets in the remaining guide slots, although not pushed by the ejector pins, remain stable due to the radial constraint of the limiting module and the support of adjacent magnets. When the lower surface of the bottom layer press-fit ring 3 contacts the stop platform 611, the first batch of magnets is precisely pressed into the deepest part of the rotor slot, completing the pre-installation.

[0052] Step 2 (Pressing in the middle layer magnets): With the bottom pressing ring 3 stationary, the two second drive units 82 are activated, driving the middle layer pressing ring 4 downwards via the second connecting plate 85 and the second drive shaft 43. The four ejector pins 42 on the middle layer pressing ring 4 (distributed within four other guide slots) begin to push the second batch of magnets downwards. At this time, since the first drive shaft 33 passes through the first movable hole 44 of the middle layer pressing ring 4, their movements do not interfere with each other. The second batch of magnets is pressed into the predetermined middle layer depth.

[0053] Step 3 (Final Pressing of Top Layer Magnets): Finally, the third drive unit 83 is activated, driving the top layer pressing ring 5 downwards via the square connecting plate 86 and four third drive shafts 53. The eight ejector pins 52 on the top layer pressing ring 5 (covering all 16 guide slots) simultaneously push the third batch of magnets in all guide slots (as well as the top of the previously pressed first and second batches of magnets) downwards until all magnets are completely pressed into the rotor slots, forming a complete magnet ring. During this process, the first drive shaft 33 and the second drive shaft 43 pass through the corresponding movable holes (54, 55) on the top layer pressing ring 5 respectively, without interfering with each other.

[0054] After pressing is completed, each drive unit is reset in reverse order, and the external lifting mechanism lifts the entire mechanism to wait for the next work cycle.

[0055] Through the above specific embodiments, this mechanism achieves "same-station, asynchronous, orderly, and precise" pressing of magnets of different lengths. Furthermore, by changing the magnet guide shafts with different outer diameters and slot numbers and the matching pressing rings, it can quickly switch to produce rotors of different specifications, making it extremely versatile.

[0056] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A universal magnet assembly mechanism for a rotor housing, characterized in that, It includes a vertically arranged magnetic steel guide shaft, and the outer side wall of the magnetic steel guide shaft has a plurality of axially opened magnetic steel guide grooves evenly distributed around its circumference; It also includes a bottom layer press-fit ring, a middle layer press-fit ring, and a top layer press-fit ring that are axially and sequentially movably sleeved on the outside of the magnet guide shaft. The inner sidewalls of the bottom layer press-fit ring, the middle layer press-fit ring, and the top layer press-fit ring are all provided with an extension press-fit arm that extends into the magnet guide groove. The lower surface of the end of the extension press-fit arm is fixed with a vertically downward-facing ejector pin. It also includes a press-fitting drive module that drives the bottom press-fitting ring, the middle press-fitting ring, and the top press-fitting ring to move asynchronously up and down; It also includes a limiting module for radially limiting the magnet inserted into the magnet guide groove.

2. The universal magnet assembly mechanism for rotor housing according to claim 1, characterized in that, The number of extended pressing arms on the bottom pressing ring and the middle pressing ring is half the number of extended pressing arms on the top pressing ring, and the total number of the three is the same as the number of magnet guide grooves on the magnet guide shaft.

3. The universal magnet assembly mechanism for rotor housing according to claim 1, characterized in that, The two side walls of the extended pressing arm along the circumferential direction of the guide shaft slide against the two side walls of the magnetic guide groove, and the length of the extended pressing arm along the radial direction of the guide shaft is greater than the depth of the magnetic guide groove.

4. The universal magnet assembly mechanism for rotor housing according to claim 1, characterized in that, The limiting module includes a positioning sleeve coaxially sleeved on the outside of the magnetic guide shaft. The lower end of the inner wall of the positioning sleeve is integrally provided with an annular boss. The inner sidewall edge of the lower surface of the annular boss is coaxially and flush with an extension guide tube. The inner wall of the extension guide tube is flush with the inner wall of the annular boss and forms an annular limiting cavity with the outer sidewall of the magnetic guide shaft to radially limit the ejector pin. During press fitting, the sidewall of the ejector pin away from the center of the magnetic guide shaft slides and fits against the outer annular sidewall of the annular limiting cavity.

5. The universal magnet assembly mechanism for rotor housing according to claim 4, characterized in that, The annular space between the inner wall of the positioning sleeve and the outer wall of the magnetic guide shaft forms a press-fit guide cavity, and the bottom press-fit ring, the middle press-fit ring and the top press-fit ring are all longitudinally movable within the press-fit guide cavity.

6. The universal magnet assembly mechanism for rotor housing according to claim 5, characterized in that, The upper surface of the annular boss forms a stop platform for the bottom press-fit ring.

7. The universal magnet assembly mechanism for rotor housing according to claim 5, characterized in that, The upper surfaces of the bottom pressing ring, the middle pressing ring, and the top pressing ring are respectively provided with a first drive shaft, a second drive shaft, and a third drive shaft extending upward through the pressing guide cavity; the middle pressing ring and the top pressing ring are each provided with a first movable hole for the first drive shaft to pass through, and the top pressing ring is also provided with a second movable hole for the second drive shaft to pass through; the first movable hole is slidably fitted with the side wall of the first drive shaft, and the inner wall of the second movable hole is slidably fitted with the side walls of the first drive shaft and the second drive shaft.

8. The universal magnet assembly mechanism for rotor housing according to claim 7, characterized in that, The universal magnet assembly mechanism for the rotor housing also includes a horizontally arranged mounting plate. The upper ends of the magnet guide shaft and the positioning sleeve are fixedly attached to the lower surface of the mounting plate. The mounting plate is provided with through holes for the first drive shaft, the second drive shaft, and the third drive shaft to pass through. The press-fit drive module is located on the upper surface of the mounting plate and drives the first drive shaft, the second drive shaft, and the third drive shaft to move asynchronously downward.

9. The universal magnet assembly mechanism for rotor housing according to claim 8, characterized in that, The first drive shaft, the second drive shaft, and the third drive shaft are all provided with guide sleeves and fixed on the mounting plate.

10. The universal magnet assembly mechanism for rotor housing according to claim 8, characterized in that, The press-fit drive module is mounted on top of the mounting plate via a bracket connected to the mounting plate and includes a first drive unit, a second drive unit, and a third drive unit. There are two of each of the first and second drive shafts, and four of each of the three drive shafts. The two first drive shafts and the two second drive shafts are respectively located on the two extended ends of the two perpendicular diameters of the magnet guide shaft, and the four three drive shafts are arranged in a ring around the magnet guide shaft. The upper ends of the two first drive shafts are connected by a horizontal first connecting plate, and the upper ends of the two second drive shafts are connected by a horizontal second connecting plate. The second connecting plate is located above the first connecting plate and the two are perpendicular to each other. A horizontal square connecting plate is also provided on the upper side of the second connecting plate, and the four three drive shafts are all connected to the square connecting plate. The third driving unit is vertically positioned downwards on the vertical center line of the square plate and its movable terminal is connected to the square plate; there are two of each of the first driving unit and the second driving unit, with both first driving units vertically downwards and connected to both ends of the first connecting plate, and both second driving units vertically downwards and connected to both ends of the second connecting plate.

Images