A permanent magnet motor rotor disassembly device with adaptive adjustment function

Abstract

A permanent magnet motor rotor disassembly device with an adaptive adjustment function belongs to the technical field of precision electromechanical equipment maintenance. The present invention solves the problem that the existing permanent magnet motor disassembly process is prone to the risk of magnetic attraction out of control and the disassembly efficiency is low. The three-axis linkage ejection mechanism includes a drive motor fixed at the center of the disc, three studs arranged in a direction parallel to the central axis of the disc, three groups of belt transmission assemblies and three groups of tensioning mechanisms installed on the disc. The disc is radially and evenly provided with three waist-shaped holes around its central axis. The three studs are respectively installed in the three waist-shaped holes, and the three studs are connected to the output shaft of the drive motor through three groups of belt transmission assemblies. Based on the dynamic torque balancing mechanism, three studs and three groups of synchronous belt transmission assemblies are used to achieve dynamic torque balance between the three supports. It effectively avoids the risk of magnetic attraction out of control during the disassembly of the permanent magnet motor, and also greatly improves the disassembly efficiency.

Description

Technical Field

[0001] The invention relates to a permanent magnet motor rotor disassembly device with an adaptive adjustment function, belonging to the technical field of precision electromechanical equipment maintenance. Background Art

[0002] With the rapid development of modern industrial technology, permanent magnet motors (PMMs) have been widely used in precision electromechanical equipment due to their high efficiency, high power density, and excellent controllability. However, maintaining and repairing PMMs, especially when disassembling key components such as the rotor and stator, presents numerous technical challenges.

[0003] The rotor of a permanent magnet motor typically contains embedded high-performance permanent magnets, such as neodymium iron boron (NdFeB) magnets, which produce extremely high magnetic field strength. This powerful magnetic field has a strong attraction to surrounding magnetically conductive materials. During disassembly, when the distance between the stator and rotor enters the range of the strong magnetic field, the nonlinear magnetic field gradient generated by the NdFeB magnets can cause transient attraction. This phenomenon not only hinders the smooth disassembly process but can also cause serious damage to the stator and rotor surfaces, affecting the performance and service life of the motor.

[0004] Furthermore, traditional permanent magnet motor disassembly relies on experienced operators manually adjusting the relative position of the stator and rotor. This method is not only time-consuming and labor-intensive, but also lacks standardization and is prone to errors caused by human error during disassembly. This inefficient and high-risk disassembly method no longer meets the modern industry's requirements for efficient, accurate, and safe maintenance of precision electromechanical equipment.

[0005] Therefore, there is an urgent need for a permanent magnet motor rotor disassembly device with adaptive adjustment function to solve the risk of magnetic attraction loss of control during the disassembly process of the permanent magnet motor and improve the disassembly process efficiency. Summary of the Invention

[0006] The present invention aims to solve the problems of the risk of magnetic attraction loss of control and low disassembly efficiency during the disassembly of existing permanent magnet motors, and further provides a permanent magnet motor rotor disassembly device with an adaptive adjustment function.

[0007] The technical solution adopted by the present invention to solve the above technical problems is:

[0008] A permanent magnet motor rotor disassembly device with an adaptive adjustment function includes a disc and a three-axis linkage ejection mechanism installed on the disc, wherein the three-axis linkage ejection mechanism includes a drive motor fixed at the center of the disc, three studs arranged in a direction parallel to the central axis of the disc, three groups of belt transmission assemblies and three groups of tensioning mechanisms installed on the disc, three waist-shaped holes are evenly opened on the disc in a radial pattern around its central axis, three studs are respectively installed in the three waist-shaped holes, and each stud is adjusted to its position in the waist-shaped hole by a limit adjustment piece, the three studs are connected to the output shaft of the drive motor through three groups of belt transmission assemblies, the tightness of the transmission belts in the three groups of belt transmission assemblies is adjusted by the three tensioning mechanisms, and a rotary movable ejector is fixed to the bottom end of each stud.

[0009] Furthermore, a level is mounted on the disc.

[0010] Furthermore, a power output shaft is fixedly connected to the output shaft of the driving motor via a coupling, and the driving pulley in the belt transmission assembly is coaxially fixed to the power output shaft.

[0011] Furthermore, a first flat portion is processed on the top end of the power output shaft.

[0012] Furthermore, a second flat portion is processed on the top end of each stud.

[0013] Furthermore, the tensioning mechanism includes a mounting seat, an angle adjustment bracket and a tensioning wheel, wherein the mounting seat is fixedly mounted on the disc, and the tensioning wheel is rotatably mounted on the mounting seat through the angle adjustment bracket.

[0014] Furthermore, the angle adjustment bracket includes an L-shaped mounting rod and a support shaft, the support shaft is vertically fixed on the mounting seat, one end of the mounting rod is rotatably connected to the top end of the support shaft, and the tensioning wheel is rotatably mounted on the other end of the mounting rod.

[0015] Furthermore, the limit adjustment part includes a flange bearing, a bolt and a nut, wherein the flange bearing is installed between the stud and the waist-shaped hole, the flange end of the flange bearing overlaps the upper surface of the disc, and the bolts are installed on the flange end of the flange bearing and the disc from top to bottom and locked by the nut.

[0016] Furthermore, limited long holes are provided in parallel on the discs on both sides of the waist-shaped hole, and the limited long holes are arranged correspondingly to the bolt holes on the flange bearing.

[0017] Furthermore, the rotary movable ejector pin and the stud are connected by threads.

[0018] Compared with the prior art, the present invention has the following effects:

[0019] During the screwing-in process of the three studs, once the load on one of the studs suddenly increases, the transmission belt reaches the slip limit and automatically slips to redistribute the torque, prompting the offset fulcrum to reset, thereby achieving adaptive adjustment of the screwing-in process of the three studs, effectively avoiding the risk of magnetic attraction out of control during the disassembly of the permanent magnet motor, and greatly improving the disassembly efficiency.

[0020] The present invention provides a permanent magnet motor rotor disassembly device with adaptive adjustment function. Based on the principle of dynamic torque balance, it uses three studs and three sets of synchronous belt transmission components to achieve dynamic torque balance between three support points. During the disassembly process, the corresponding threads of the three studs are screwed into the threaded holes on the permanent magnet motor rotor. There is no need to destroy the permanent magnet motor rotor or stator structure, and no damage will be caused to the structures at other positions of the rotor.

[0021] By setting up a synchronous belt drive assembly to maintain the dynamic balance of the ejection torque of the three studs, non-coplanar overturning torque can be avoided during the disassembly process, thereby effectively preventing the rotor axis from deviating and greatly improving the accuracy of repeated assembly.

[0022] By fixing a rotary movable ejector pin at the bottom end of the stud and utilizing the bearing inside the rotary movable ejector pin itself, the stud can rotate around its own rotation center after being positioned by the rotary movable ejector pin.

[0023] The permanent magnet motor rotor disassembly device with adaptive adjustment function of the present invention can not only be used for disassembling the permanent magnet motor rotor, but also for installing the rotor. It can also be used for non-destructive disassembly and installation of various types of components, such as end covers or bearing sleeves, and has significant functional scalability and application potential. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the first three-dimensional structure of the permanent magnet motor rotor disassembly device with adaptive adjustment function of the present invention;

[0025] Figure 2 This is a second three-dimensional structural diagram of the permanent magnet motor rotor disassembly device with adaptive adjustment function of the present invention;

[0026] Figure 3 A schematic top view of the permanent magnet motor rotor disassembly device with adaptive adjustment function according to the present invention;

[0027] Figure 4 It is a front view schematic diagram of the permanent magnet motor rotor disassembly device with adaptive adjustment function of the present invention;

[0028] Figure 5 for Figure 4 An enlarged schematic diagram of point P;

[0029] Figure 6 It is a schematic diagram of the three-dimensional structure of the tensioning mechanism.

[0030] In the picture:

[0031] 1. Disc; 11. Waist-shaped hole; 12. Limiting long hole; 2. Drive motor; 3. Stud; 31. Second flat position; 4. Belt drive assembly; 5. Tensioning mechanism; 51. Mounting seat; 52. Angle adjustment bracket; 53. Tensioning pulley; 6. Rotary movable ejector pin; 7. Limit adjustment member; 8. Power output shaft; 81. First flat position. DETAILED DESCRIPTION

[0032] Specific implementation method 1: Combination Figures 1 to 6 This embodiment is explained, and the technical solutions in the embodiment of the present invention are clearly and completely described. Obviously, the described embodiment is only a part of the embodiment of the present invention, rather than all the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] It should be noted that the descriptions of the present invention regarding directions such as "front", "back", "left", "right", "inside", "outside", "left side", "right side", "upper", "lower", "top", and "bottom" are all defined based on the relationship between the orientations or positions shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the structure must be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the present invention. In the description of the present invention, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0034] In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediary, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0035] A permanent magnet motor rotor disassembly device with adaptive adjustment function includes a disc 1 and a three-axis linkage ejection mechanism installed on the disc 1, wherein the three-axis linkage ejection mechanism includes a drive motor 2 fixed at the center position of the disc 1, three studs 3 arranged in a direction parallel to the central axis of the disc 1, three groups of belt transmission components 4 and three groups of tensioning mechanisms 5 installed on the disc 1, three waist-shaped holes 11 are evenly opened on the disc 1 in a radial pattern around its central axis, the three studs 3 are respectively installed in the three waist-shaped holes 11, and each stud 3 realizes its position adjustment in the waist-shaped hole 11 through a limit adjustment member 7, the three studs 3 are correspondingly connected to the output shaft of the drive motor 2 through three groups of belt transmission components 4, and the tightness of the transmission belts in the three groups of belt transmission components 4 are correspondingly adjusted through three groups of tensioning mechanisms 5, and the bottom end of each stud 3 is fixed with a rotary movable ejector 6.

[0036] The operation process of dismantling the rotor of a permanent magnet motor using the self-adaptive adjustment function of the present invention is as follows:

[0037] First, slide the three studs 3 along the length of the three waist-shaped holes 11 on the disc 1 to form an equilateral triangle support distribution that matches the threaded holes on the rotor;

[0038] Then, change the tightness of the transmission belt through the adjustment mechanism to ensure that the slip threshold is appropriate;

[0039] Align the three studs 3 with the three threaded holes on the rotor and screw them in, adjusting the screwing length to keep the disc 1 level;

[0040] Finally, the driving motor 2 is started to drive the three studs 3 to rotate simultaneously, or the three studs 3 are rotated manually in sequence to gradually push out the rotor.

[0041] During the screwing-in process of the three studs 3, once the load on one of the studs 3 suddenly increases, the transmission belt reaches the slip limit and automatically slips to achieve torque redistribution, prompting the offset fulcrum to reset, thereby achieving adaptive adjustment of the screwing-in process of the three studs 3, effectively avoiding the risk of magnetic attraction loss of control during the disassembly of the permanent magnet motor, and greatly improving the disassembly efficiency.

[0042] The present invention provides a permanent magnet motor rotor disassembly device with adaptive adjustment function. Based on the principle of dynamic torque balance, it uses three studs 3 and three sets of synchronous belt transmission components 4 to achieve dynamic torque balance between three support points. During the disassembly process, the corresponding threads of the three studs 3 are screwed into the threaded holes on the permanent magnet motor rotor. There is no need to destroy the permanent magnet motor rotor or stator structure, and no damage will be caused to the structures at other positions of the rotor.

[0043] By providing the synchronous belt drive assembly 4, the dynamic balance of the ejection torque of the three studs 3 is maintained, thereby avoiding non-coplanar overturning torque during the disassembly process, thereby effectively avoiding the deviation of the rotor axis and greatly improving the repeated assembly accuracy.

[0044] The drive motor 2 and the tensioning mechanism 5 form a power distribution module, which supports electric or manual dual-mode switching and is suitable for various scenarios such as batch maintenance of production lines and precision debugging in laboratories.

[0045] Each stud 3 is adjusted in position in the waist-shaped hole 11 by a limit adjustment member 7, thereby adjusting its position in the radial direction of the disc 1 to adapt to the position of the threaded hole on the rotor of the permanent magnet motor to be disassembled.

[0046] The three belt drive assemblies 4 can be three driving pulleys arranged axially in sequence and correspondingly drive three driven pulleys through three synchronous belts; or one driving pulley can drive three driven pulleys through three synchronous belts. In this structural state, three belt grooves are provided on the driving pulley and the three driven pulleys along their own axial directions, thereby ensuring that the three synchronous belts are arranged horizontally.

[0047] By attaching a rotating ejector pin 6 to the bottom end of the stud 3 and utilizing a bearing within the pin 6, the stud 3 can rotate about its own rotation center after being positioned by the pin 6. The specific structure of the rotating ejector pin 6 is known from the prior art and will not be further described here.

[0048] The permanent magnet motor rotor disassembly device with adaptive adjustment function of the present invention can not only be used for disassembling the permanent magnet motor rotor, but also for installing the rotor. It can also be used for non-destructive disassembly and installation of various types of components, such as end covers or bearing sleeves, and has significant functional scalability and application potential.

[0049] A level is mounted on the disc 1. This design facilitates adjustment of the level of the disc 1, thereby facilitating adjustment of the screwing length of the three studs 3 into the threaded holes of the rotor, thereby preventing axis deviation during disassembly.

[0050] The output shaft of the driving motor 2 is fixedly connected with a power output shaft 8 through a coupling, and the driving pulley in the belt transmission assembly 4 is coaxially fixedly mounted on the power output shaft 8. Such design, by arranging the power output shaft 8, is convenient to realize the installation of the belt transmission assembly 4.

[0051] The top end of the PTO shaft 8 is machined with a first flattened portion 81. This design facilitates manual rotation of the PTO shaft 8. In the event of a drive motor 2 failure, the PTO shaft 8 can be manually rotated with a tool to simultaneously control the screwing of the three studs 3 into the threaded holes of the rotor, providing an emergency operation.

[0052] Each stud 3 has a second flattened portion 31 machined at its top. This design facilitates manual screwing of individual studs 3, making it suitable for precise laboratory commissioning, where the studs 3 must be precisely aligned with the threaded holes on the rotor before the drive motor 2 is actuated.

[0053] The tensioning mechanism 5 includes a mounting base 51, an angle adjustment bracket 52, and a tensioning pulley 53. The mounting base 51 is fixedly mounted on the disc 1, and the tensioning pulley 53 is rotatably mounted on the mounting base 51 via the angle adjustment bracket 52. This design allows the angle adjustment bracket 52 to adjust the horizontal position of the tensioning pulley 53, thereby adjusting the contact position between the tensioning pulley 53 and the transmission belt, thereby adjusting the tightness of the transmission belt and ultimately adjusting the slip threshold of the transmission belt.

[0054] The angle adjustment bracket 52 comprises an L-shaped mounting rod and a support shaft. The support shaft is vertically fixed to the mounting base 51. One end of the mounting rod is rotatably connected to the top of the support shaft, and the tensioning pulley 53 is rotatably mounted on the other end of the mounting rod. This design ensures that the driving pulleys of the three belt drive assemblies 4 are coaxially arranged, so that the three drive belts are necessarily located at three different horizontal heights. The corresponding tensioning pulley 53 for each drive belt is also necessarily at a different height. By selecting support shafts at different heights, each tensioning pulley 53 can be adapted to drive belts of different heights.

[0055] The limit adjustment member 7 includes a flange bearing, a bolt and a nut, wherein the flange bearing is installed between the stud 3 and the waist-shaped hole 11, the flange end of the flange bearing overlaps the upper surface of the disc 1, and the bolts are installed on the flange end of the flange bearing and the disc 1 from top to bottom and locked by the nut. With such a design, the specific structure of the flange bearing is prior art and will not be described here. The nut is located below the disc 1 and is used to lock the flange end of the flange bearing and the disc 1. The position adjustment and locking of the flange bearing in the length direction of the waist-shaped hole 11 are achieved by the cooperation of the bolt and the nut, thereby achieving the position adjustment and fixation of the stud 3 in the length direction of the waist-shaped hole 11. By setting the flange bearing, after it is fixed in the length direction of the waist-shaped hole 11, the stud 3 installed therein can still achieve a rotational movement.

[0056] The disc 1 on either side of the waist-shaped hole 11 has parallel limited slots 12, which are arranged vertically corresponding to the bolt holes on the flange bearing. This design facilitates the insertion of bolts, thereby facilitating the fixing of the flange bearing after adjusting its position along the length of the waist-shaped hole 11.

[0057] There is a threaded connection between the rotary movable ejector pin 6 and the stud 3. With this design, the fixed end of the rotary movable ejector pin 6 is processed with an external thread, and the bottom of the stud 3 is processed with an internal thread, thereby facilitating the threaded connection between the rotary movable ejector pin 6 and the stud 3, thereby facilitating the installation and removal of the rotary movable ejector pin 6 and the stud 3.

[0058] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A permanent magnet motor rotor disassembly device with adaptive adjustment function, characterized by: The invention comprises a disc (1) and a three-axis linkage ejection mechanism installed on the disc (1), wherein the three-axis linkage ejection mechanism comprises a driving motor (2) fixed at the center of the disc (1), three studs (3) arranged in a direction parallel to the central axis of the disc (1), three groups of belt transmission components (4) and three groups of tensioning mechanisms (5) installed on the disc (1), three waist-shaped holes (11) are evenly opened on the disc (1) in a radial shape around the central axis, and the three studs (3) are respectively installed in the three waist-shaped holes (11), and each stud (3) realizes its position through a limit adjustment member (7). The position in the waist-shaped hole (11) is adjusted, and the three studs (3) are connected to the output shaft of the drive motor (2) through three groups of belt transmission components (4), and the tightness of the transmission belts in the three groups of belt transmission components (4) is adjusted through three groups of tensioning mechanisms (5). The bottom end of each stud (3) is fixed with a rotary movable ejector pin (6); the tensioning mechanism (5) includes a mounting seat (51), an angle adjustment bracket (52) and a tensioning wheel (53), wherein the mounting seat (51) is fixed on the disc (1), and the tensioning wheel (53) is rotatably mounted on the mounting seat (51) through the angle adjustment bracket (52).

2. The permanent magnet motor rotor disassembly device with adaptive adjustment function according to claim 1, characterized in that: A level is mounted on the disc (1).

3. The permanent magnet motor rotor disassembly device with adaptive adjustment function according to claim 1, characterized in that: A power output shaft (8) is fixedly connected to the output shaft of the driving motor (2) via a coupling, and the driving pulley in the belt transmission assembly (4) is coaxially fixedly mounted on the power output shaft (8).

4. The permanent magnet motor rotor disassembly device with adaptive adjustment function according to claim 3, characterized in that: The top end of the power output shaft (8) is processed with a first flat portion (81).

5. The permanent magnet motor rotor disassembly device with adaptive adjustment function according to claim 1, characterized in that: The top end of each stud (3) is machined with a second flat portion (31).

6. The permanent magnet motor rotor disassembly device with adaptive adjustment function according to claim 1, characterized in that: The angle adjustment bracket (52) comprises an L-shaped mounting rod and a support shaft, wherein the support shaft is vertically fixed on the mounting seat (51), one end of the mounting rod is rotatably connected to the top end of the support shaft, and the tensioning wheel (53) is rotatably mounted on the other end of the mounting rod.

7. The permanent magnet motor rotor disassembly device with adaptive adjustment function according to claim 1, characterized in that: The limit adjustment member (7) includes a flange bearing, a bolt and a nut, wherein the flange bearing is inserted between the stud (3) and the waist-shaped hole (11), the flange end of the flange bearing overlaps the upper surface of the disc (1), and the bolt is sequentially inserted into the flange end of the flange bearing and the disc (1) from top to bottom and is locked by the nut.

8. The permanent magnet motor rotor disassembly device with adaptive adjustment function according to claim 7, characterized in that: The discs (1) on both sides of the waist-shaped hole (11) are provided with limited long holes (12) in parallel, and the limited long holes (12) are arranged correspondingly to the bolt holes on the flange bearing.

9. The permanent magnet motor rotor disassembly device with adaptive adjustment function according to claim 1, characterized in that: The rotary movable ejector pin (6) and the stud (3) are connected by threads.

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