Motor stator-rotor assembling device

Abstract

The application relates to the technical field of motor assembling equipment, and discloses a motor stator-rotor combined assembling equipment which comprises a base, a rotor positioning assembly, a machine shell positioning assembly and a clamping assembly; the rotor positioning assembly is arranged on the base, and the rotor positioning assembly is suitable for positioning a reducer rotor; the machine shell positioning assembly is arranged on the base, and the machine shell positioning assembly is suitable for positioning a stator machine shell; along the up-down direction, the clamping assembly is movably arranged on the base, and the clamping assembly is suitable for clamping one of the stator machine shell and the reducer rotor which is suspended upwards. The motor stator-rotor combined assembling equipment improves the installation accuracy.

Description

Technical Field

[0001] This application relates to the field of motor assembly equipment technology, and in particular to a motor stator and rotor assembly equipment. Background Technology

[0002] In the early stages of developing hybrid dual-motor systems for new energy electric drives, specialized equipment is needed to expedite product development. Stator and rotor assembly equipment is crucial in both single-motor and dual-motor systems.

[0003] In related technologies, when assembling the shaft system of a hybrid dual-motor with a reducer, the stator and rotor assembly is prone to problems due to the magnetic attraction of the rotor, which prevents the stator bearing housing from being aligned with the rotor bearing. This can easily lead to the outer ring of the rotor bearing getting stuck and scraping when it enters the bearing housing. Therefore, improving the accuracy of the stator and rotor assembly is a technical problem that urgently needs to be solved. Utility Model Content

[0004] This application provides a motor stator and rotor assembly device, which improves the accuracy of installation.

[0005] To achieve the above objectives, the main technical solutions adopted in this application include: In a first aspect, embodiments of this application provide a motor stator and rotor assembly device, including a base, a rotor positioning component, a housing positioning component, and a clamping component; the rotor positioning component is disposed on the base and is adapted to position the reducer rotor; the housing positioning component is disposed on the base and is adapted to position the stator housing; along the vertical direction, the clamping component is movably disposed on the base and is adapted to clamp the stator housing and the reducer rotor that is suspended above.

[0006] According to the motor stator and rotor assembly equipment proposed in the first aspect of this application, the housing positioning component can perform preliminary positioning and fixation of the stator housing, effectively preventing the stator housing from shifting or shaking during the clamping process, and greatly improving the positioning accuracy.

[0007] Optionally, the rotor positioning assembly and / or housing positioning assembly are detachably mounted on the base.

[0008] In the above scheme, the above structure facilitates the quick replacement of matching positioning components according to different specifications and models of rotor and stator housings, effectively improving the versatility of the entire assembly equipment.

[0009] Optionally, the base includes a first plate portion and a first rod portion, the first rod portion is disposed on the first plate portion and extends upward, the clamping assembly is movably disposed on the first rod portion in the vertical direction, and the lower of the rotor positioning assembly and the housing positioning assembly is movably disposed on the first plate portion.

[0010] In the above scheme, the above structure helps to accurately assemble the stator housing and the reducer rotor, effectively correct assembly deviations, and improve ease of use.

[0011] Optionally, the rotor positioning assembly includes a third plate and a plurality of positioning posts, the plurality of positioning posts being spaced apart on the third plate and respectively used to engage with corresponding rotor positioning holes, the third plate being movably disposed on the first plate.

[0012] In the above scheme, multiple positioning columns can effectively reduce problems such as radial offset, circumferential rotation and posture distortion of the reducer rotor, and the third plate also facilitates the movement of the reducer rotor.

[0013] Optionally, the assembly equipment includes multiple fixing rods, with one end of the fixing rod disposed on the third plate along the axial direction of the fixing rod, and the other end of the fixing rod detachably connected to the housing positioning assembly.

[0014] In the above solution, the detachable connection method can not only meet the replacement needs of various functional components of the equipment and adapt to the assembly of motors of different specifications, but also help to broaden the scope of application of the equipment.

[0015] Optionally, the motor stator and rotor assembly equipment also includes a movable base, which is movably disposed on the first rod in the vertical direction, and the clamping assembly is detachably disposed on the movable base.

[0016] In the above solution, the structure can flexibly adjust the overall station height according to the stator housing of different height specifications, adapt to the assembly needs of various types of motors, and effectively improve the versatility of the equipment.

[0017] Optionally, the clamping assembly includes a second plate, a clamping gripper, and a plurality of positioning rods. The second plate is detachably mounted on the movable seat. The clamping gripper is mounted on the second plate and is adapted to clamp the stator housing. The plurality of positioning rods are mounted on the second plate and are adapted to abut against the reducer rotor. The plurality of positioning rods are spaced apart along the horizontal direction.

[0018] In the above scheme, the above structure can further constrain the rotor's offset and wobble, ensure the coaxiality of the stator and rotor, and improve the assembly accuracy of the motor stator and rotor.

[0019] Optionally, the positioning rod is movably disposed on the second plate in the vertical direction.

[0020] In the above solution, precise height adjustment facilitates limiting the rotors of different types of reducers, thereby improving the versatility of the equipment.

[0021] Optionally, the motor stator and rotor assembly equipment includes a cylinder, which is located on the second plate, and the power output end of the cylinder is connected to a positioning rod.

[0022] In the above scheme, the output stroke and clamping force of the cylinder are controllable, the action is smooth and uniform, and the contact state of the positioning rod can be precisely controlled.

[0023] Optionally, the movable base is constructed as a ring structure, with a first mounting hole on the inner periphery of the movable base and a second mounting hole on the outer periphery of the second plate. The assembly equipment also includes multiple fasteners, each fastener passing through the corresponding first mounting hole and engaging with the corresponding second mounting hole.

[0024] In the above scheme, the structure will not interfere with the stator housing, reducer rotor assembly and workpiece handling operations, ensuring smooth assembly.

[0025] The beneficial effects of this application are as follows: the housing positioning component can perform preliminary positioning and fixation of the stator housing, effectively preventing the stator housing from shifting or shaking, and greatly improving the positioning accuracy. At the same time, the housing positioning component can be detachably installed on the base, and the corresponding component can be quickly replaced according to different specifications of stator housing, making the equipment more versatile. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the specific embodiments of this application or 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 this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of the stator and rotor assembly equipment in some embodiments of this application; Figure 2 This is a schematic diagram of the overall structure of the rotor positioning assembly in some embodiments of this application; Figure 3 This is a schematic diagram of the overall structure of the clamping assembly in some embodiments of this application.

[0028] [Explanation of Labels in the Attached Image] 100. Base; 110. First plate; 120. First rod; 200. Rotor positioning assembly; 210. Third plate; 220. Positioning post; 300. Housing positioning assembly; 400 Clamping assembly; 410 Second plate; 411 Second mounting hole; 420 Clamping gripper; 430 Positioning rod; 440 Cylinder; 500. Fixed rod; 600, Movable base; 610, First mounting hole; Y represents the up / down direction. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0031] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0032] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0033] In the early stages of developing hybrid dual-motor systems for new energy electric drives, specialized equipment is needed to expedite product development. Stator and rotor assembly equipment is crucial in both single-motor and dual-motor systems.

[0034] In related technologies, when the shaft system of a hybrid dual motor with a reducer is assembled, the stator and rotor cannot be aligned and installed with the rotor bearing due to the magnetic attraction of the rotor. This can easily lead to the outer ring of the rotor bearing getting stuck and scraping when it enters the bearing housing. At the same time, the stator housing is attracted off-center by the rotor's magnetic force and cannot be assembled horizontally, which damages the sealing rubber line and causes the electric drive to fail the airtightness test.

[0035] Current production line stator and rotor assembly equipment requires stable program design and automated material feeding, resulting in excessively long design and manufacturing cycles. Operation and maintenance heavily rely on specialized personnel. Product development requires functions that enable rapid implementation, simple operation, and quick changeover, which are difficult to achieve with automated production line equipment. Changing automated equipment models requires re-tuning the program, heavily relying on specialized personnel for program maintenance, which is extremely difficult to implement during the multi-version structure verification development phase.

[0036] In view of this, in order to improve the accuracy of motor stator and rotor assembly, this application proposes a motor stator and rotor assembly device. A housing positioning component is detachably mounted on a base, suitable for positioning the stator housing. A clamping component is movably mounted on the base along the vertical direction, suitable for clamping the stator housing and the upper-suspended rotor of the reducer. The clamping component and the rotor positioning component are positioned opposite each other and spaced apart along the vertical direction. The vertical positions of the housing positioning component and the rotor positioning component can be set according to actual needs. This embodiment takes the housing positioning component above the rotor positioning component as an example. First, the housing positioning component completes the initial positioning of the stator housing, and then the vertically movable clamping component clamps and fixes it, effectively preventing the stator housing from shifting or shaking, significantly improving positioning accuracy. At the same time, the housing positioning component is detachably mounted on the base, allowing for quick replacement of the corresponding component according to different stator housing specifications, making the equipment more versatile.

[0037] The following describes an embodiment of a motor stator and rotor assembly device proposed in this application, with reference to the accompanying drawings.

[0038] According to the first aspect of the present application, a motor stator and rotor assembly device is provided, such as... Figure 1 As shown, it includes a base 100, a rotor positioning assembly 200, a housing positioning assembly 300, and a clamping assembly 400.

[0039] The rotor positioning assembly 200 is disposed on the base 100 and is suitable for positioning the reducer rotor. It can be understood that the rotor positioning assembly 200 can position the reducer rotor to ensure that the reducer rotor remains stable during assembly.

[0040] The housing positioning component 300 is disposed on the base 100 and is suitable for positioning the stator housing. It can be understood that the housing positioning component 300 serves as a transition tooling to pre-position the stator housing, ensuring the stability of the stator housing, preventing the stator housing from shifting during hoisting, and improving the accuracy of assembly.

[0041] Along the vertical direction Y, the clamping assembly 400 is movably disposed on the base 100. After the housing positioning assembly 300 positions the stator housing, the clamping assembly 400 is adapted to clamp the stator housing and the upper-suspended rotor of the reducer. Along the vertical direction Y, the clamping assembly 400 and the rotor positioning assembly 200 are arranged opposite to each other and spaced apart. It can be understood that the clamping assembly 400 can clamp the stator housing, and when the housing positioning assembly 300 is removed, the clamping assembly 400 can drive the stator housing to move to achieve assembly.

[0042] According to the motor stator and rotor assembly equipment proposed in the first aspect of this application, the operation method of first accurately positioning and then firmly locking is adopted. After the stator housing is initially positioned by the housing positioning component 300, the clamping operation is carried out, which can further reduce problems such as stator housing offset, rotation, and shaking, and further stabilize the installation posture of the stator housing. The clamping component 400 and the rotor positioning component 200 are arranged opposite each other in the vertical Y direction and spaced apart, which can effectively ensure the coaxiality of the stator and rotor during assembly and help improve the assembly accuracy.

[0043] In some embodiments, the rotor positioning assembly 200 and / or the housing positioning assembly 300 are detachably mounted on the base 100. This facilitates quick replacement of the appropriate positioning components for rotors of different specifications and models, effectively improving the versatility of the entire assembly equipment and meeting the assembly requirements of multiple motors.

[0044] Meanwhile, the structure is easy to disassemble and assemble, making it convenient to inspect, maintain, replace parts, and clean surface debris of the rotor positioning component 200. This reduces the maintenance difficulty and operating cost of the equipment, and can continuously ensure the accuracy of the rotor positioning reference, avoid positioning deviation caused by component wear and dirt accumulation, ensure the coaxiality and alignment accuracy when the stator and rotor are assembled, and further improve the motor assembly quality and finished product qualification rate.

[0045] In some embodiments, such as Figure 1 As shown, the base 100 includes a first plate portion 110 and a first rod portion 120. The first rod portion 120 is disposed on the first plate portion 110 and extends upward. Along the vertical direction Y, the clamping assembly 400 is movably disposed on the first rod portion 120 to remove the stator housing from the housing positioning assembly 300. The rotor positioning assembly 200 and the housing positioning assembly 300, the lower one of which is movably disposed on the first plate portion 110.

[0046] The first rod 120 extending upward provides a dedicated vertical guide structure for the clamping assembly 400, which allows the clamping assembly 400 to move smoothly and accurately up and down along the rod. During the movement, radial sway and jamming are not likely to occur. It can flexibly adjust the clamping position according to the stator housing of different height specifications, and ensure accurate alignment of the clamping action, so that the stator housing is reliably locked.

[0047] Meanwhile, the installation position can be flexibly adjusted according to the rotor size and the coaxiality requirements of the stator and rotor, which helps to accurately complete the assembly of the stator housing and the reducer rotor, effectively reducing assembly deviations and improving ease of use.

[0048] In some embodiments, such as Figure 2 As shown, the rotor positioning assembly 200 includes a third plate portion 210 and a plurality of positioning posts 220. The plurality of positioning posts 220 are spaced apart on the third plate portion 210 and are respectively used to cooperate with the corresponding rotor positioning holes. The third plate portion 210 is movably disposed on the first plate portion 110.

[0049] Multiple positioning posts 220 can effectively reduce problems such as radial offset, circumferential rotation and tilting of the reducer rotor, making the rotor placement more stable and the positioning more accurate. At the same time, the multi-point cooperation can evenly distribute the rotor's own weight and the forces during the assembly process, avoiding stress concentration that could cause deformation of the positioning posts 220 or wear of the rotor positioning holes, and can maintain the positioning effect stably even after long-term use.

[0050] The third plate 210 can be movably mounted on the first plate 110 of the base 100. It can not only flexibly adjust the overall position of the reducer rotor according to different models and different positioning hole layouts, greatly improving the adaptability and versatility of the equipment, but also finely adjust the rotor position before assembly to ensure that the rotor and the upper stator housing are strictly aligned and coaxial, effectively preventing parts from bumping and scratching during assembly, and avoiding problems such as stator rubbing during subsequent motor operation. In addition, this split assembly structure facilitates later inspection and maintenance, further improving the overall assembly efficiency and product qualification rate.

[0051] In some embodiments, such as Figure 2 As shown, the assembly equipment includes multiple fixing rods 500. Along the axial direction of the fixing rods 500, one end of the fixing rod 500 is disposed on the third plate portion 210, and the other end of the fixing rod 500 is detachably connected to the housing positioning assembly 300.

[0052] The rotor positioning assembly 200 and the housing positioning assembly 300 can be connected into a whole, so that the two share the same set of assembly references, effectively locking the relative position between them, avoiding positional deviation during the stator and rotor assembly process, continuously ensuring the coaxiality of the stator and rotor, and greatly improving the assembly accuracy.

[0053] The detachable connection method can not only meet the replacement needs of various functional components of the equipment and adapt to the assembly of motors of different specifications, further expanding the scope of application of the equipment, but also make it convenient for staff to disassemble and inspect the components, replace parts and perform daily cleaning, reducing the difficulty of maintenance.

[0054] In some embodiments, such as Figure 3As shown, the motor stator and rotor assembly equipment also includes a movable base 600, which is movably disposed on the first rod portion 120 along the vertical direction Y. The clamping assembly 400 is detachably disposed on the movable base 600.

[0055] The movable seat 600 is slidably mounted on the first rod 120 in the vertical direction Y. It can achieve stable vertical guiding movement by relying on the first rod 120. The overall station height can be flexibly adjusted according to the stator housing of different height specifications, adapting to the assembly needs of various types of motors and effectively improving the versatility of the equipment. At the same time, the rod guiding structure can prevent radial sway and jamming during the lifting and lowering of the movable seat 600, ensuring the accuracy of position adjustment.

[0056] The clamping assembly 400 is detachably mounted on the movable base 600. The clamping components can be replaced with matching ones according to the shape and size of the stator housing, further expanding the applicability of the equipment.

[0057] In some embodiments, such as Figure 3 As shown, the clamping assembly 400 includes a second plate portion 410, a clamping gripper 420, and a plurality of positioning rods 430. The second plate portion 410 is detachably disposed on the movable seat 600. The clamping gripper 420 is disposed on the second plate portion 410 and is adapted to clamp the stator housing. The plurality of positioning rods 430 are disposed on the second plate portion 410 and are adapted to abut against the reducer rotor. The plurality of positioning rods 430 are spaced apart along the horizontal direction.

[0058] The clamping gripper 420 installed on the second plate 410 can firmly hold the stator housing, preventing the stator housing from loosening, deflecting, or shifting during the assembly process, and keeping the assembly posture of the stator stable at all times. At the same time, it facilitates the quick replacement of matching parts according to different sizes and models of stator housings and reducer rotors, effectively improving the adaptability and versatility of the equipment.

[0059] Multiple positioning rods 430 arranged at intervals along the horizontal direction simultaneously press against the reducer rotor to form a multi-point limiting structure, which can effectively constrain the rotor's offset and sway, ensure the coaxiality of the stator and rotor, and the multi-point contact can evenly distribute the pressing force, preventing excessive force on a single point from causing damage or deformation to the rotor surface, thus comprehensively improving the assembly accuracy of the motor stator and rotor.

[0060] In some embodiments, the positioning rod 430 is movably disposed on the second plate portion 410 along the vertical direction Y.

[0061] By precisely adjusting the height, it is easy to limit the rotors of different types of reducers, improve the versatility of the equipment, effectively constrain rotor offset and sway, and avoid problems such as local pressure deformation and surface scratches of the rotor caused by improper contact position, thus ensuring the coaxiality and assembly accuracy of the stator and rotor.

[0062] In some embodiments, such as Figure 3 As shown, the motor stator and rotor assembly equipment includes a cylinder 440, which is located on the second plate 410, and the power output end of the cylinder 440 is connected to the positioning rod 430.

[0063] The cylinder 440 enables automated extension and position adjustment of the positioning rod 430, replacing the traditional manual operation method. This not only effectively reduces the intensity of manual labor but also significantly improves the overall automation level of the equipment, making it suitable for continuous batch assembly operations on production lines. The output stroke and clamping force of the cylinder 440 are controllable, and the movement is smooth and uniform. It can precisely control the contact state of the positioning rod 430, reliably forming a limit constraint on the reducer rotor, effectively preventing the rotor from shifting or shaking during assembly, and ensuring the coaxiality of the stator and rotor and the assembly accuracy.

[0064] In some embodiments, such as Figure 3 As shown, the movable base 600 is constructed as a ring structure. The inner periphery of the movable base 600 has a first mounting hole 610, and the outer periphery of the second plate portion 410 has a second mounting hole 411. The assembly device also includes a plurality of fasteners, each fastener passing through the corresponding first mounting hole 610 and engaging with the corresponding second mounting hole 411.

[0065] The movable base 600 adopts a ring structure. Its hollow internal area can effectively avoid the intermediate assembly channel and will not interfere with the stator housing, reducer rotor assembly and workpiece loading and unloading operations, ensuring smooth assembly operations.

[0066] The movable base 600 has a first mounting hole 610 on its inner circumference, and the second plate 410 has a corresponding second mounting hole 411 on its outer circumference. The assembly is completed by passing multiple fasteners through the two sets of mounting holes in sequence. The circumferential multi-point locking connection makes the second plate 410 and the movable base 600 more firmly connected, so that the force during operation is evenly distributed along the circumference, avoiding problems such as circumferential rotation and radial offset of the second plate 410. It stabilizes the working reference of the clamping gripper 420 and the positioning rod 430, and continuously ensures the accuracy of stator clamping and rotor auxiliary positioning.

[0067] The fastener connection method is a detachable structure, which is simple and convenient to disassemble and assemble. It can quickly replace the matching second plate 410 component according to different specifications of stator housing and reducer rotor, thereby improving the equipment versatility and production line changeover efficiency.

[0068] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

[0069] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A motor stator and rotor assembly device, characterized in that, include: Base (100); A rotor positioning assembly (200) is disposed on the base (100), the rotor positioning assembly (200) being adapted to position the reducer rotor; A housing positioning assembly (300) is disposed on the base (100), and the housing positioning assembly (300) is adapted to position the stator housing; A clamping assembly (400) is movably disposed on the base (100) along the vertical direction (Y). The clamping assembly (400) is adapted to clamp the stator housing and the reducer rotor that are suspended above.

2. The motor stator and rotor assembly equipment according to claim 1, characterized in that, The rotor positioning assembly (200) and / or the housing positioning assembly (300) are detachably disposed on the base (100).

3. The motor stator and rotor assembly equipment according to claim 1, characterized in that, The base (100) includes a first plate portion (110) and a first rod portion (120). The first rod portion (120) is disposed on the first plate portion (110) and extends upward along the vertical direction (Y). The clamping assembly (400) is movably disposed on the first rod portion (120). The lower of the rotor positioning assembly (200) and the housing positioning assembly (300) is movably disposed on the first plate portion (110).

4. The motor stator and rotor assembly equipment according to claim 3, characterized in that, The rotor positioning assembly (200) includes a third plate (210) and a plurality of positioning posts (220). The plurality of positioning posts (220) are spaced apart on the third plate (210) and are respectively used to cooperate with the corresponding rotor positioning holes. The third plate (210) is movably disposed on the first plate (110).

5. The motor stator and rotor assembly equipment according to claim 4, characterized in that, The assembly equipment includes a plurality of fixing rods (500), one end of which is disposed on the third plate (210) along the axial direction of the fixing rods (500), and the other end of which is detachably connected to the housing positioning assembly (300).

6. The motor stator and rotor assembly equipment according to claim 3, characterized in that, The motor stator and rotor assembly equipment also includes a movable seat (600), which is movably disposed on the first rod portion (120) along the vertical direction (Y), and the clamping assembly (400) is detachably disposed on the movable seat (600).

7. The motor stator and rotor assembly equipment according to claim 6, characterized in that, The clamping assembly (400) includes a second plate (410), a clamping gripper (420), and a plurality of positioning rods (430). The second plate (410) is detachably disposed on the movable seat (600). The clamping gripper (420) is disposed on the second plate (410) and is adapted to clamp the stator housing. The plurality of positioning rods (430) are disposed on the second plate (410) and are adapted to abut against the reducer rotor. The plurality of positioning rods (430) are spaced apart along the horizontal direction.

8. The motor stator and rotor assembly equipment according to claim 7, characterized in that, Along the vertical direction (Y), the positioning rod (430) is movably disposed on the second plate portion (410).

9. The motor stator and rotor assembly equipment according to claim 8, characterized in that, The motor stator and rotor assembly equipment includes a cylinder (440), which is disposed on the second plate (410), and the power output end of the cylinder (440) is connected to the positioning rod (430).

10. The motor stator and rotor assembly equipment according to claim 7, characterized in that, The movable base (600) is constructed as a ring structure. The inner periphery of the movable base (600) has a first mounting hole (610), and the outer periphery of the second plate (410) has a second mounting hole (411). The assembly device also includes a plurality of fasteners, each of which passes through the corresponding first mounting hole (610) and engages with the corresponding second mounting hole (411).

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