An apparatus for assembling a motor rotor and stator

Abstract

The utility model provides a kind of equipment of motor rotor and stator combined installation, and the equipment includes workbench, pressure mechanism and clamping mechanism.Working, any clamping arm of clamping mechanism oscillates to the direction of rotating disc center, drives rotating disc to rotate, rotating disc rotates through its remaining limit sleeve synchronous drive all clamping arms to do centripetal motion, to push and shove stator to rotating disc center position.Sector of pressure mechanism rotates to make its lateral push face contact after transmission wheel, through the transmission wheel of pressing down push pressure rod to move down, rotor is pressed into stator inner cavity.In addition, transmission wheel is connected on pressure rod by adjusting hole and connecting shaft cooperative cooperation, by loosening the second bolt of connecting shaft after sliding adjustment connecting shaft position along adjusting hole, the installation height of transmission wheel relative to sector can be changed, and then the end point of the stroke of pressure rod is controlled, so that the same equipment can be compatible with processing axial size differentiation multiple model rotors, significantly improve the process adaptability and production line universality of equipment.

Description

Technical Field

[0001] This utility model relates to the field of motor assembly technology, and in particular to a device for assembling a motor rotor and stator. Background Technology

[0002] In the field of automated assembly of motor rotors and stators, traditional press-fitting equipment generally relies on pressure actuators with fixed strokes. Such equipment typically uses hydraulic cylinders, pneumatic pistons, or rigid cam assemblies as drive sources, transmitting pressure to the pressure rod through linear motion or rotational motion along a fixed trajectory, driving the rotor to embed into the stator cavity.

[0003] However, because the end point of the pressure rod's downward stroke is determined by the fixed dimensions of the transmission chain, the equipment can only adapt to rotor models with specific axial dimensions. When the production line needs to switch between different specifications of motor rotors, the difference in rotor shaft length leads to changes in the required pressing depth. Traditional equipment cannot dynamically adjust the stroke end point, and adaptation must be achieved by replacing the pressure rod, modifying the drive mechanism, or completely overhauling the equipment hardware. This limitation forces manufacturers to configure dedicated equipment for different rotor models or frequently stop to adjust, which not only increases equipment investment but also leads to insufficient production line flexibility and low changeover efficiency, becoming a bottleneck restricting the mass production of multiple motor varieties. Utility Model Content

[0004] To address the shortcomings mentioned above in the background technology, this utility model provides a device for assembling a motor rotor and stator.

[0005] The present invention adopts the following technical solution: A device for assembling an electric motor rotor and stator, the device comprising: A workbench, the surface of which is provided with a clearance opening, a connecting bracket is fixed on the workbench with the clearance opening, and a stator is placed on the workbench and corresponds to the clearance opening; A pressure mechanism, comprising a sector plate, a pressure rod, a spring, and a transmission wheel; The sector plate is restricted to rotate on the connecting frame. The pressure rod moves up and down relative to the connecting frame on the relief opening, and an adjustment plate is provided on the pressure rod, with an arc-shaped adjustment hole on the adjustment plate; The spring is sleeved on the pressure rod, and the two ends of the spring abut against the connecting frame and the adjusting plate respectively. The elastic force of the spring lifts the pressure rod. The transmission wheel is fixed to the end of a connecting shaft and rotates. The connecting shaft passes through the adjusting hole and is fastened with a connecting bolt or nut, so that the connecting shaft is fixed relative to the adjusting plate. In this process, after the stator is placed on the worktable and the rotor is placed on the stator, the sector plate rotates, causing the pushing surface on one side of the sector plate to push the transmission wheel and drive the pressure rod to descend. The bottom of the pressure rod presses the rotor into the stator cavity of the stator.

[0006] In one possible implementation, a centering sleeve is fixed to the bottom of the pressure rod, and the centering sleeve has a tapered hole that is smaller at the top and larger at the bottom. When the upper end of the rotor has a connecting shaft, the tapered hole is fitted onto the outside of the connecting shaft.

[0007] In one possible implementation, one end of the connecting shaft is provided with a raised limiting step, and the other end of the connecting shaft is provided with a threaded hole adapted to a helical connection first bolt. A bearing seat is provided at the center of the transmission wheel, and a bearing is installed in the bearing seat. The first bolt passes through the inner ring of the bearing and is helically connected to the connecting shaft to press the bearing against the end face of the transmission wheel and the connecting shaft.

[0008] In one possible implementation, the device further includes a clamping mechanism, which comprises: A turntable is restricted to rotate on the worktable, and the receiving gap in the middle of the turntable corresponds to the relief opening, and the stator is placed into the receiving gap; The limiting sleeves are all restricted to rotating axially and fixedly relative to the turntable, and a plurality of the limiting sleeves are distributed in a ring on the turntable; Clamping arms, one end of each clamping arm is restricted to rotate on the worktable, a plurality of clamping arms are arranged in a ring around the center of the relief opening on the worktable, each clamping arm passes through each of the limiting sleeves in a corresponding manner, and the clamping arm extends into the turntable; When one of the clamping arms swings toward the center of the turntable, it moves the limiting sleeve, causing the turntable to rotate, and moves the remaining limiting sleeves accordingly, causing the remaining clamping arms to swing toward the center of the turntable, until the stator in the accommodating gap is pushed to the center of the turntable.

[0009] In one possible implementation, a first rotating shaft is fixed to one end of the sector plate, and a second rotating shaft is fixed at the pivot position of the rotating axis on the worktable. The first rotating shaft and the second rotating shaft are connected by a drive. In the initial state before the stator is placed, each of the clamping arms swings away from the receiving gap, and the sector plate faces upward.

[0010] In one possible implementation, the toroidal surface of the turntable passes through at the middle position in the axial direction to form a clearance gap, and each of the limiting sleeves is embedded in the clearance gap and rotates.

[0011] In one possible implementation, the turntable includes an upper ring, a lower ring, a second bolt, and a fixing sleeve. A plurality of fixing sleeves are disposed between the upper ring and the lower ring. Each fixing sleeve is fitted with the second bolt, and the stud of the second bolt passes through the upper ring and the fixing sleeve and is screwed into the lower ring to tighten it, so that the upper ring and the lower ring clamp the fixing sleeve. The height of the fixing sleeve forms the height of the clearance gap.

[0012] In one possible implementation, a connecting pin is provided on the end face of the limiting sleeve, and the connecting pin is inserted into the turntable with a clearance fit to form a rotational fit.

[0013] In one possible implementation, the annular groove is formed by a recess in the lower surface of the turntable, and fixed columns are distributed in a ring around the clearance opening on the worktable. Each fixed column is connected to a support wheel, and one side of each support wheel is embedded into the annular groove, with the side of the support wheel abutting against the side of the annular groove.

[0014] As can be seen from the above description of the structure of this utility model, compared with the prior art, this utility model has the following advantages: In the pressure mechanism of this utility model, after the sector plate rotates so that its lateral pushing surface contacts the transmission wheel, the pressure rod is pushed down stably by the downward transmission wheel, pressing the rotor into the stator cavity. The core of this is the cooperative mechanism of the adjustment hole and the connecting shaft, which connects the transmission wheel to the pressure rod. By loosening the second bolt of the connecting shaft and sliding along the adjustment hole to adjust the position of the connecting shaft, the vertical installation height of the transmission wheel relative to the rotation axis of the sector plate can be changed, thereby controlling the end point of the downward stroke of the pressure rod. This height adjustment function directly solves the technical bottleneck that traditional equipment cannot adapt to the pressing depth of rotors of different specifications, enabling the same equipment to be compatible with multiple models of rotors with different axial dimensions. While ensuring the coaxial accuracy of the rotor pressing into the stator cavity, it significantly improves the process adaptability and production line versatility of the equipment, enabling mass production of multiple varieties of motors and avoiding equipment modification or repeated investment due to changing product specifications. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the front of the present invention when the stator is not placed.

[0016] Figure 2 for Figure 1 An enlarged schematic diagram of point A in the middle.

[0017] Figure 3 This is a three-dimensional structural diagram of the back side after the stator and rotor are assembled to realize this practical application.

[0018] Figure 4 for Figure 3 A magnified diagram of point B in the middle.

[0019] Figure 5 for Figure 3 A magnified diagram of point C.

[0020] Figure 6 This is a cross-sectional structural diagram showing the connection between the transmission wheel and the adjusting plate.

[0021] Figure 7 This is a front view of the stator and rotor when they are assembled in this practical application.

[0022] Figure 8 A three-dimensional structural diagram showing the rotor being pressed down and assembled with the stator by the centering sleeve.

[0023] Figure 9 This is a top view showing the stator not being clamped by the clamping device.

[0024] Figure 10 A top view of the clamping device holding the stator.

[0025] Figure 11 This is a cross-sectional schematic diagram of one side of the turntable structure.

[0026] Figure 12 A schematic diagram of an embodiment in which a protrusion is provided for the adjustment hole. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this application clearer, the application will now be described in further detail with reference to the accompanying drawings.

[0028] In the following description, the terms "first," "second," etc., 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. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0029] Furthermore, in this application, directional terms such as "upper" and "lower" are defined relative to the indicated placement of the components in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and can change accordingly depending on the placement of the components in the accompanying drawings.

[0030] This utility model provides a device for assembling a motor rotor 42 and a stator 41, as shown in the attached figure. Figure 1 and 3 As shown, the device includes a worktable 1, a pressure mechanism 2, and a clamping mechanism 3. See also the attached diagram. Figure 8The worktable 1 has a clearance opening 101 on its surface to allow the rotor 42 to pass. A connecting frame 11 is fixed to the clearance opening 101 on the worktable 1. A pressure mechanism 2 is mounted on the connecting frame 11, and a clamping mechanism 3 is mounted on the worktable 1. When assembling the rotor 42 and stator 41, the stator 41 is first positioned in the area corresponding to the clearance opening at the center of the worktable 1. Then, the rotor 42 is coaxially placed at the entrance of the stator 41's inner cavity. Vertical downward mechanical pressure is applied by the pressure mechanism 2, driving the rotor 42 to be pressed along the axis of the stator 41's inner cavity into the preset assembly position within the stator 41, thus completing the coaxial assembly of the motor magnetic circuit assembly.

[0031] Please refer to the appendix. Figure 4 The pressure mechanism 2 includes a sector plate 21, a transmission wheel 22, a pressure rod 23, and a spring 24. The sector plate 21 has a geometric sector-shaped structure, with symmetrically arranged equal-length pushing surfaces 211 on both sides and an arc-shaped top, forming a pressure transmission structure. A first rotating shaft 213 is fixed to one end of the sector plate 21, and a bearing 221 seat is fixed to the upper end of the connecting frame 11. The first rotating shaft 213 passes through and is fixed to the inner ring of the bearing 221 seat, thus restricting the sector plate 21 to rotate on the connecting frame 11. A guide sleeve 12 is also fixed to the connecting frame 11, with a linear bearing 221 embedded within it. The pressure rod 23 passes through the linear bearing 221 of the guide sleeve 12 with a clearance fit, allowing the pressure rod 23 to rise and fall relative to the connecting frame 11 at the clearance opening 101. An adjusting plate 231 is also provided at the upper end of the pressure rod 23, with an arc-shaped adjusting hole 232 that curves upwards at both ends. Spring 24 is sleeved on pressure rod 23, and the two ends of spring 24 abut against guide sleeve 12 of connecting frame 11 and under adjusting plate 231 respectively, so as to maintain pressure rod 23 in normal raised state through elastic preload.

[0032] The transmission wheel 22 is fixed to the end of a connecting shaft 25 and rotates thereon. The connecting shaft 25 passes through the adjusting hole 232 and is secured with a connecting bolt or nut, thus fixing the connecting shaft 25 relative to the adjusting plate 231. See attached diagram for details. Figure 6As shown, one end of the connecting shaft 25 has a radially protruding limiting step 251, and the other end of the connecting shaft 25 has a threaded hole adapted to the screw connection of the first bolt 252. Bearing 221 positions are provided at the center of both sides of the transmission wheel 22, and bearings 221 are embedded in the bearing 221 positions. During assembly, the connecting shaft 25 is inserted from one side of the transmission wheel 22, and its limiting step 251 contacts and positions the transmission wheel 22. The first bolt 252 passes through the inner ring of the bearing 221 and is screwed into the threaded hole of the connecting shaft 25. By tightening the first bolt 252, an axial clamping force is formed between the limiting step 251 and the bolt head of the first bolt 252. This clamping force is sequentially transmitted to the inner rings of the bearings 221 on both sides, the adjusting plate 231, and the end face of the transmission wheel 22, ultimately achieving rigid fixation between the connecting shaft 25 and the adjusting plate 231. This structure, through the differentiated constraints of the inner and outer rings of the bearing 221, ensures that the transmission wheel 22 retains only the rotational degree of freedom around the axis of the connecting shaft 25, while eliminating axial movement and radial sway, providing a stable force transmission path for the press-fitting process of the rotor 42, and effectively avoiding the problem of scratching the inner hole of the stator 41 due to transmission clearance.

[0033] Please refer to the appendix. Figure 7 When the sector plate 21 rotates downwards, the lateral pushing surface 211 of the sector plate 21 contacts the transmission wheel 22, forming a progressive pressure transmission. This pushes the pressure rod 23 to move steadily downwards along the vertical guide sleeve 12. When the arc surface 212 of the sector plate 21 corresponds to the critical position of pressing down on the top of the transmission wheel 22, the pressure rod 23 reaches the end of its downward stroke. By loosening the connecting shaft 25 and the first bolt 252, the connecting shaft 25 can be slidably adjusted within the arc-shaped hole of the adjusting plate 231, thereby changing the vertical height of the installation position of the transmission wheel 22 relative to the rotation center of the first rotating shaft 213. This adjustment mechanism allows the operator to flexibly set the initial installation height of the transmission wheel 22 according to the pressing depth requirements of different models of rotors 42, thereby precisely controlling the final limit position when the sector plate 21 presses down on the transmission wheel 22, and realizing customized adjustment of the lower pressing stroke of the pressure rod 23. This height-adjustable design effectively adapts to the assembly requirements of motor rotors 42 of different specifications, ensuring that all types of rotors 42 can be accurately pressed into the preset depth of the stator 41 cavity, significantly improving the process adaptability and assembly accuracy of the equipment, while maintaining the stability and reliability of the pressure transmission system.

[0034] Preferably, as shown in the appendix Figure 12 As shown, the two sides of the adjustment hole 231 can be connected by multiple protrusions 234, each of which creates a space for the connecting shaft 25 to be inserted through the gap between two adjacent protrusions 234, so that the connecting shaft 25 is blocked by the protrusions 234 on both sides, thereby completely locking the adjusted connecting shaft 25.

[0035] When the stator 41 is placed on the worktable 1 and the rotor 42 is coaxially placed at the inlet of the stator 41 cavity, the first rotating shaft 213 is driven to rotate, thereby rotating the sector plate 21. After the lateral pushing surface 211 of the sector plate 21 contacts the transmission wheel 22, the pressure rod 23 is pushed down steadily along the vertical guide sleeve 12 by the downward transmission wheel 22. When the arc-shaped surface of the sector plate 21 is at the critical position at the top of the transmission wheel 22, the pressure rod 23 reaches the lower dead center and completes the maximum stroke compression. At this time, the centering sleeve 233 at the bottom of the pressure rod 23 precisely presses the rotor 42 along the axis of the stator 41 cavity to the preset assembly depth. After the pressing is completed, the first rotating shaft 213 is reversed to reset the sector plate 21. Under the preload of the spring 24, the pressure rod 23 automatically rebounds to the upper dead center. Its top adjusting plate 231 maintains contact with the bottom surface of the sector plate 21, forming a complete pressure release and reset cycle. The mechanism achieves a smooth transition between pressure loading and unloading through the asymmetrical contour design of the sector plate 21. Combined with the automatic reset function of the spring 24, it ensures that the system returns to the initial standby state after each press-fitting. This not only ensures the coaxial accuracy of the rotor 42 and stator 41 assembly, but also enables rapid reset of the equipment status during continuous operation, effectively improving the assembly efficiency and consistency of the motor components.

[0036] Please refer to the appendix. Figure 8 The bottom of the pressure rod 23 is fixed with a centering sleeve 233, which has a tapered hole that is smaller at the top and larger at the bottom. When the output shaft 421 of the rotor 42 extends to both ends (one end for driving and the other end for connecting the cooling fan), the pressure rod 23 presses down, causing the tapered sleeve to be outside the upper output shaft 421. The tapered hole wall and the outer surface of the connecting shaft 25 form a progressive contact fit, automatically correcting the axial deviation between the rotor 42 and the inner cavity of the stator 41 during the pressing process of the pressure rod 23. This tapered guide design can adapt to connecting shafts 25 of rotor 42 with different diameters. Through the radial constraint of the tapered hole slope, the rotor 42 is forced to be adjusted to a coaxial state with the inner cavity of the stator 41, ensuring that the rotor 42 always remains centered during the pressing process into the stator 41 core. This effectively eliminates the eccentric pressing phenomenon caused by manual placement errors, greatly improves the assembly coaxiality and air gap uniformity of the motor magnetic circuit components, and provides a basic guarantee for motor performance optimization.

[0037] In addition, the centering sleeve 332 is screwed upwards through the tapered hole and connected to the pressure rod 33 for fastening, so that the centering sleeve 332 is fixed relative to the pressure rod 33 and can be detached. When it is necessary to assemble rotors 42 of different heights, this can also be achieved by replacing the centering sleeve 332 of different heights.

[0038] As attached Figure 9 and 10 As shown, the clamping mechanism 3 includes a turntable 31, a limiting sleeve 32, and a clamping arm 33. The turntable 31 is restricted to rotate on the worktable 1, and the restriction method can be as shown in the attached figure. Figure 5 and11 As shown, the annular groove 311 is formed by a recess on the lower surface of the turntable 31. Fixed posts 34 are arranged annularly on the worktable 1 around the clearance opening 101. The fixed posts 34 can be fixed by inserting screws from the bottom of the worktable 1 upwards into the fixed posts 34. Each fixed post 34 is connected to a support wheel 341, which can be a bearing 221. One side of each support wheel 341 is embedded in the annular groove 311, and the side of the support wheel 341 abuts against the side of the annular groove 311. This structure, which restricts the annular groove 311 through the support wheels 341, keeps the turntable 31 suspended under the coordinated action of multiple bearings 221, while ensuring that the central accommodating gap of the turntable 31 remains precisely coaxial with the clearance opening 101 of the worktable 1. This design, through a multi-point contact floating support method, not only ensures the smooth rotation of the turntable 31, but also effectively controls the radial runout of the turntable 31, providing a stable reference positioning for the clamping process of the stator 41. During assembly operations, the stator 41 can be directly and vertically placed onto the worktable 1 through the accommodating gap.

[0039] The limiting sleeves 32 are all restricted to axially fixed rotation relative to the turntable 31, and multiple limiting sleeves 32 are distributed in a ring around the turntable 31. Preferably, a clearance gap is formed through the annular surface of the turntable 31 at the middle position in the axial direction, and each limiting sleeve 32 is embedded in the clearance gap for rotation. The limiting sleeves 32 can be arranged as shown in the attached figure. Figure 11 As shown, the turntable 31 includes an upper ring 312, a lower ring 313, a second bolt 314, and a fixing sleeve 315. The upper ring 312 and the lower ring 313 are both annularly distributed with multiple connecting holes. The end face of the limiting sleeve 32 is provided with a connecting pin 321, which is inserted into the connecting hole of the turntable 31 with clearance fit to form a rotational fit. During assembly, the bottom connecting pin 321 of the limiting sleeve 32 is inserted into the connecting hole of the lower ring 313 with a clearance fit to form initial positioning; then the upper ring 312 is placed on top of the limiting sleeve 32, so that its connecting hole and the top connecting pin 321 of the limiting sleeve 32 form a secondary fit; several fixing sleeves 315 are set between the upper and lower rings 313 as support components, and are threaded to the lower ring 313 by a second bolt 314 passing through the upper ring 312 and the fixing sleeves 315, ultimately forming a sandwich structure that encapsulates the limiting sleeve 32 between the upper ring 312 and the lower ring 313, and this sandwich is the clearance gap. The precise height of the fixing sleeve 315 determines the axial dimension of the clearance gap, which is slightly larger than the total height of the limiting sleeve 32 to provide rotation clearance. This layered assembly scheme ensures that the limiting sleeve 32 maintains a stable degree of rotational freedom in the clearance gap through the double guiding cooperation of the connecting pin 321 and the annular hole. At the same time, the rigid support of the fixing sleeve 315 effectively prevents the turntable 31 from being deformed under pressure, so that the multiple limiting sleeves 32 always maintain a uniform radial clearance during synchronous movement.

[0040] As attached Figure 2 As shown, one end of each clamping arm 33 is restricted to rotate on the worktable 1 by the connection of the mounting shaft 331. Specifically, a bearing 221 seat is fixed on the worktable 1, and the mounting shaft 331 is fixed in the bearing 221 seat so that the clamping arm 33 can only rotate. Multiple clamping arms 33 are arranged in a ring around the center of the relief opening 101 on the worktable 1. Each clamping arm 33 passes through the limiting sleeve 32 in a corresponding manner, and the other end of the clamping arm 33 extends into the turntable 31, thereby forming a mutual restriction between the turntable 31 and the clamping arm 33. When the clamping arm 33 swings, it can push the turntable 31, and when the turntable 31 rotates, it can drive the clamping arm 33 to swing. Specifically, when any clamping arm 33 swings towards the center of the turntable 31, its lateral force acting on the limiting sleeve 32 drives the turntable 31 to rotate around the center. During the rotation of the turntable 31, the remaining limiting sleeves 32 synchronously drive all clamping arms 33 to perform centripetal motion, ultimately causing the front ends of multiple clamping arms 33 to work together against the outer edge of the stator 41 within the accommodating gap, pushing the stator 41 to the center position of the turntable 31. This process ensures that the central axis of the stator 41 coincides with the center of the clearance opening 101 of the worktable 1 and the axis of the pressure rod 23, establishing a precise reference alignment for the subsequent press-fitting of the rotor 42. When the pressure rod 23 performs the pressing action, the rotor 42 is vertically embedded along the inner cavity axis of the stator 41, completely eliminating the eccentricity and misalignment phenomenon commonly found in traditional assembly.

[0041] Furthermore, one of the clamping arms 33 is connected to a second rotating shaft 333 fixed at the pivot position of the rotating axis on the worktable 1. The first rotating shaft 213 and the second rotating shaft 333 are connected by a bevel gear transmission structure. In the initial state before placing the stator 41, each clamping arm 33 swings out of the accommodating gap with the sector plate 21 facing upward. Further, the working end of the clamping arm 33 is hinged to a freely rotatable guide wheel 332. When the clamping arm 33 performs a clamping action, the guide wheel 332 pushes the outer edge of the stator 41 through rolling contact, significantly reducing the positioning deviation caused by traditional sliding friction. Furthermore, the guide wheel 332 is made of compressible rubber material, utilizing its elastic deformation characteristics to generate a unique mechanical delay effect. That is, when the guide wheel 332 initially contacts the stator 41, it pushes the stator 41 to move. After the stator 41 reaches the center position, the clamping arm 33 continues to swing, continuously increasing the clamping force to further deform the rubber body. At this time, the clamping arm 33 continues to move while the stator 41 remains stationary, forming an automatic timing separation between the precise centering of the stator 41 and the pressing action of the pressure rod 23. This design combines the motion synchronization of the bevel gear transmission with the elastic deformation characteristics of the rubber guide wheel 332, ensuring the accurate reset of the initial state of the clamping mechanism 3 and optimizing the process timing of the stator 41 positioning and the rotor 42 pressing.

[0042] In summary, this invention employs a fan-shaped plate 21 for progressive pressure application and a spring 24 for automatic reset to coordinate the movement of the pressure rod 23. The transmission wheel 22, connected by a connecting shaft 25, achieves height adjustment to accommodate the installation height requirements of rotors 42 of different specifications. The clamping mechanism 3, based on the linkage design of the turntable 31, the limiting sleeve 32, and the clamping arm 33, works with a floating support platform to achieve automatic centering of the stator 41, ensuring precise alignment of the stator 41's central axis with the pressure rod 23. The elastic guide wheel 332 utilizes material deformation characteristics to create a sequential separation between positioning and pressing, avoiding process interference. Its core innovation lies in the radial self-correction function of the conical centering sleeve 233, which eliminates manual placement errors. The adjustable connecting shaft 25 structure adapts to different rotor 42 pressing depths, and the mechanical synchronization system ensures coordinated positioning of multiple clamping arms 33. The entire device achieves coaxiality control and improved assembly efficiency of rotor 42 and stator 41 assembly without electrical control, significantly reducing motor air gap unevenness.

[0043] The above are merely specific embodiments of this utility model, but the design concept of this utility model is not limited thereto. Any non-substantial modifications made to this utility model using this concept shall be considered as an infringement of the protection scope of this utility model.

Claims

1. A device for assembling a motor rotor and stator, characterized in that, The device includes: A workbench, the surface of which is provided with a clearance opening, a connecting bracket is fixed on the workbench with the clearance opening, and a stator is placed on the workbench and corresponds to the clearance opening; A pressure mechanism, comprising a sector plate, a pressure rod, a spring, and a transmission wheel; The sector plate is restricted to rotate on the connecting frame. The pressure rod moves up and down relative to the connecting frame on the relief opening, and an adjustment plate is provided on the pressure rod, with an arc-shaped adjustment hole on the adjustment plate; The spring is sleeved on the pressure rod, and the two ends of the spring abut against the connecting frame and the adjusting plate respectively. The elastic force of the spring lifts the pressure rod. The transmission wheel is fixed to the end of a connecting shaft and rotates. The connecting shaft passes through the adjusting hole and is fastened with a connecting bolt or nut, so that the connecting shaft is fixed relative to the adjusting plate. In this process, after the stator is placed on the worktable and the rotor is placed on the stator, the sector plate rotates, causing the pushing surface on one side of the sector plate to push the transmission wheel and drive the pressure rod to descend. The bottom of the pressure rod presses the rotor into the stator cavity of the stator.

2. The device as described in claim 1, characterized in that, The bottom of the pressure rod is fixed with a centering sleeve. The centering sleeve has a tapered hole that is smaller at the top and larger at the bottom. When the upper end of the rotor has a connecting shaft, the tapered hole is fitted onto the outside of the connecting shaft.

3. The device as described in claim 1, characterized in that, One end of the connecting shaft is provided with a protruding limiting step, and the other end of the connecting shaft is provided with a threaded hole, which is adapted to be screwed to the first bolt. The center of the transmission wheel is provided with a bearing seat, and the bearing seat is fitted with a bearing. The first bolt passes through the inner ring of the bearing and is screwed to the connecting shaft to press the bearing tightly against the end face of the transmission wheel and the connecting shaft.

4. The device as described in claim 1, characterized in that, The device also includes a clamping mechanism, which comprises: A turntable is restricted to rotate on the worktable, and the receiving gap in the middle of the turntable corresponds to the relief opening, and the stator is placed into the receiving gap; The limiting sleeves are all restricted to rotating axially and fixedly relative to the turntable, and a plurality of the limiting sleeves are distributed in a ring on the turntable; Clamping arms, one end of each clamping arm is restricted to rotate on the worktable, a plurality of clamping arms are arranged in a ring around the center of the relief opening on the worktable, each clamping arm passes through each of the limiting sleeves in a corresponding manner, and the clamping arm extends into the turntable; When one of the clamping arms swings toward the center of the turntable, it moves the limiting sleeve, causing the turntable to rotate, and moves the remaining limiting sleeves accordingly, causing the remaining clamping arms to swing toward the center of the turntable, until the stator in the accommodating gap is pushed to the center of the turntable.

5. The device as described in claim 4, characterized in that, One end of the sector plate is fixed to a first rotating shaft, and one of the clamping arms is connected to the axis of rotation on the worktable and a second rotating shaft is fixed thereon. The first rotating shaft and the second rotating shaft are connected by a transmission. In the initial state before the stator is placed, each of the clamping arms swings away from the receiving gap and the sector plate faces upward.

6. The device as described in claim 4, characterized in that, The turntable ring has a clearance gap formed at the middle position of the axial direction, and each of the limiting sleeves is embedded in the clearance gap and rotates.

7. The device as described in claim 6, characterized in that, The turntable includes an upper ring, a lower ring, a second bolt, and a fixing sleeve. Multiple fixing sleeves are provided between the upper ring and the lower ring. Each fixing sleeve is fitted with the second bolt, and the stud of the second bolt passes through the upper ring and the fixing sleeve and is screwed into the lower ring to tighten it, so that the upper ring and the lower ring clamp the fixing sleeve. The height of the fixing sleeve forms the height of the clearance gap.

8. The device as described in any one of claims 4, 5, and 6, characterized in that, The end face of the limiting sleeve is provided with a connecting pin, which is inserted into the turntable with clearance to form a rotational fit.

9. The device as claimed in any one of claims 4, 5, and 6, characterized in that, The turntable has an annular groove formed by a recessed surface below it. Fixed columns are distributed in a ring around the clearance opening on the worktable. Each fixed column is connected to a support wheel. One side of each support wheel is embedded into the annular groove, and the side of the support wheel abuts against the side of the annular groove.

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