Stator and rotor assembling mechanism capable of resisting strong magnetic attraction force

Abstract

The invention discloses a stator and rotor assembling mechanism capable of resisting strong magnetic attraction. The stator and rotor assembling mechanism comprises a rack, the upper sliding table is connected with the rack through an upper guide rail sliding block; the lower sliding table is connected with the rack through a lower guide rail sliding block, and the lower sliding table is opposite to the upper sliding table; a cylinder body of the driving locking device is fixed to the upper sliding table, and the end of a piston rod is connected to the lower sliding table; the upper positioning assembly is arranged on the upper sliding table and is used for positioning the upper end of the rotor end cover assembly; the lower positioning assembly is arranged on the lower sliding table and is used for positioning the lower end of the rotor end cover assembly; a cylinder body of the press-fitting driving device is fixed to the top of the rack through an upper top plate, and a piston rod is downwards connected with the upper sliding table through an electric cylinder floating connector and a transition rod in sequence; the rotor feeding sliding table is arranged on the rack, located on the side of the lower sliding table and used for conveying the rotor end cover assembly to a combination preparation station on the lower sliding table. According to the mechanism, accurate positioning of the stator end cover assembly under strong magnetic force can be achieved, and accurate assembling of the stator end cover assembly and the stator shell assembly is completed.

Description

Technical Field

[0001] This invention relates to the fields of mechanical manufacturing and automation technology, and in particular to a stator and rotor assembly mechanism resistant to strong magnetic attraction. Background Technology

[0002] As a core component of new energy vehicles, the performance and quality of the electric drive system directly affect the overall vehicle's power performance. The assembly of the stator and rotor, as one of the core assembly processes of the electric drive system, is affected by various factors such as magnetic attraction, the alignment of the upper and lower centers, and the coaxiality of the upper and lower centers with the bearing holes in the housing.

[0003] Existing technologies often employ a lower center telescopic method to position the rotor shaft, while the upper center, equipped with grippers, holds and fixes the rotor and end cap assembly. In this structure, the upper and lower centers belong to two separate sets of components. Firstly, it is difficult to ensure consistent coaxiality. Secondly, because the lower center is a floating structure, a strong magnetic force is generated between the stator and rotor during assembly, causing the lower center to retract and disengage from the rotor shaft's central positioning hole, leading to assembly failure. Summary of the Invention

[0004] The technical problem to be solved by this invention is to provide a stator-rotor assembly mechanism resistant to strong magnetic attraction, which solves the following problems: the upper and lower centers are installed in a self-sealing C-shaped mechanism, ensuring good centering; the C-shaped mechanism is locked in real time by a locking cylinder, completely eliminating the phenomenon of the lower center retraction caused by strong magnetic attraction during the assembly process. This enables stable assembly between the stator and rotor, greatly improving the assembly qualification rate.

[0005] The technical problem to be solved by the present invention is achieved through the following technical solution: A stator-rotor assembly mechanism resistant to strong magnetic attraction includes: frame; The upper slide is connected to the frame via an upper guide rail slider and can slide vertically. The lower slide is connected to the frame via a lower guide rail slider and can slide vertically. The lower slide is arranged opposite to the upper slide. A drive locking device has a cylinder body fixedly connected to the upper slide table, and its piston rod end is connected to the lower slide table through a cylinder floating joint. It is used to drive the upper slide table and the lower slide table to move towards or away from each other. The drive locking device has a locking state to form a rigid connection between the upper slide table and the lower slide table. An upper positioning component is disposed on the upper slide platform and is used to position the upper end of the rotor end cover assembly. The lower positioning component is disposed on the sliding platform and is used to position the lower end of the rotor end cover assembly; A press-fitting drive device includes a cylinder body and a piston rod. The cylinder body is fixed to the top of the frame via an upper top plate. The piston rod connects downwards to the upper slide table via an electric cylinder floating joint and a transition rod, thereby driving the upper slide table to move downwards. A rotor feeding slide is mounted on the base and located to the side of the lower slide, used to transport the rotor end cover assembly to the assembly preparation position on the lower slide; when the lower slide moves upward to the assembly position, the lower positioning component and the upper positioning component together define the assembly position for clamping and positioning the rotor end cover assembly.

[0006] Preferably, in the above technical solution, the upper positioning component includes an end cap limiting component and a first rotor positioning mandrel. The end cap limiting component is fixed to the lower end face of the upper slide, and the first rotor positioning mandrel is coaxially fastened to the end cap limiting component and extends downward to be inserted into the upper center hole of the rotor end cap component to achieve positioning.

[0007] Preferably, in the above technical solution, the lower positioning component is a second rotor positioning mandrel, which is coaxially fixed to the upper end face of the lower slide and extends upward, for inserting into the lower center hole of the rotor end cover assembly, and together with the upper positioning component, completes the upper and lower coaxial positioning of the rotor end cover assembly.

[0008] Preferably, in the above technical solution, the drive locking device is a locking cylinder, which can automatically lock at the end of the stroke, so that the upper slide and the lower slide are rigidly connected as one unit to resist the strong magnetic attraction between the stator and rotor during assembly.

[0009] Preferably, the above technical solution further includes a counterweight device, which includes a counterweight cylinder, a cylinder body and a piston rod. The cylinder body is connected to the upper top plate, and the piston rod is connected to the upper slide table through a cylinder connector, for balancing the weight of the upper slide table and its connecting components.

[0010] A method for assembling a stator and rotor, employing the aforementioned stator and rotor assembly mechanism resistant to strong magnetic attraction, is characterized by comprising the following steps: S1: The rotor end cover assembly is transported to the assembly station by the rotor feeding slide. At this time, the rotor end cover assembly is located between the upper positioning assembly and the lower positioning assembly. S2: Control the action of the drive locking device, drive the lower slide to move upward, so that the lower positioning component pushes the rotor end cover component away from the rotor feeding slide and together with the upper positioning component completes the clamping and positioning. S3: The rotor feeding slide is horizontally withdrawn to free up axial space; S4: Place the drive locking device in the locked state to make the upper slide and the lower slide rigidly connected to form a self-locking C-shaped frame; S5: Simultaneously control the pressing drive device and the counterweight cylinder to extend, drive the upper slide and lower slide, which are in a locked state, to move downward as a whole, and press the rotor assembly into the stator housing assembly; S6: Release the locking state of the drive locking device and control its drive slide to move downwards to reset; S7: Simultaneously control the retraction of the press-fitting drive device and the counterweight cylinder, driving the upper slide to move upward and reset.

[0011] The above-described technical solution of the present invention has the following beneficial effects: This invention provides a stator-rotor assembly mechanism resistant to strong magnetic attraction. Utilizing a self-locking C-type clamping mechanism, it avoids the assembly failure caused by the positioning mandrel slipping off the rotor shaft due to strong magnetic force, a problem common in traditional assembly mechanisms. This enables precise positioning of the stator end cover assembly under strong magnetic force, achieving accurate assembly with the stator housing assembly. Attached Figure Description

[0012] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the invention and, together with their description, serve to explain the principles of the invention.

[0013] Figure 1 This is a schematic diagram of the stator and rotor assembly mechanism for resisting strong magnetic attraction according to the present invention.

[0014] The components include: 1. Press-fit electric cylinder; 2. Upper top plate; 3. Electric cylinder floating joint; 4. Transition rod; 5. End cover limiting assembly; 6. First rotor positioning mandrel; 7. Rotor feeding slide; 8. Stator housing assembly; 9. Second rotor positioning mandrel; 10. Base; 11. Lower slide; 12. Lower guide rail slider; 13. Cylinder floating joint; 14. Locking cylinder; 15. Upper guide rail slider; 16. Upper slide; 17. Welded machine body; 18. Cylinder joint; 19. Counterweight cylinder. Detailed Implementation

[0015] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0016] As shown in the figure, the stator and rotor assembly mechanism resisting strong magnetic attraction according to this application mainly consists of a frame, a sliding and locking system, a positioning system, a drive system, a counterweight system, and a feeding system. Details are as follows: 1. Frame: The frame is the supporting skeleton of the entire mechanism, consisting of a welded body 17 and a base 10. The welded body 17 is fixed to the ground or workbench via the base 10, providing a stable mounting base for all other moving parts.

[0017] 2. Sliding and locking system (the core of the self-locking C-shaped frame): This system includes an upper slide 16, a lower slide 11, a drive locking device 14 and its connecting components.

[0018] The upper slide 16 is floatingly connected to the welding machine body 17 via the upper guide rail slider 15, allowing for precise vertical sliding. The lower slide 11 is also floatingly connected to the welding machine body 17 via the lower guide rail slider 12, similarly allowing vertical sliding, and is positioned vertically opposite the upper slide 16, forming a "C"-shaped opening. The drive locking device 14 is a locking cylinder. Its cylinder body (base) is fastened to the lower surface of the upper slide 16 with screws. The end of its piston rod is threaded to the cylinder floating joint 13, which is connected to the lower slide 11 with screws. This locking cylinder 14 is used to drive the lower slide 11 to move towards (closed) or away from (open) the upper slide 16. It has a locking state. When the cylinder runs to the end of its stroke (i.e., the position where the upper and lower slides clamp the workpiece), it can automatically or in a controlled manner lock, so that the upper slide 16 and the lower slide 11 form a rigid connection, thereby forming a closed "self-locking C-shaped frame" that can resist strong external forces.

[0019] 3. Positioning System: The positioning system is used to perform high-precision coaxial positioning of the rotor end cover assembly before press fitting, including an upper positioning component and a lower positioning component.

[0020] Upper positioning assembly: mounted on the upper slide 16. Specifically, it includes: end cover limiting assembly 5 and first rotor positioning mandrel 6. The end cover limiting assembly 5 is connected to the lower end face of the upper slide 16 by screws. The first rotor positioning mandrel 6 is coaxially fastened to the end cover limiting assembly 5 by screws and extends downwards. Its lower end is designed as a precision positioning head for insertion into the upper center hole of the rotor end cover assembly during assembly.

[0021] Lower positioning component: mounted on the lower slide 11. In this application, the lower positioning component is the second rotor positioning mandrel 9. The second rotor positioning mandrel 9 is coaxially fixed to the upper end face of the lower slide 11 by screws and extends upward. Its upper end is also a precision positioning head, used to insert into the lower center hole of the rotor end cover assembly. When the upper and lower slides are closed, the first rotor positioning mandrel 6 and the second rotor positioning mandrel 9 work together to complete the precise coaxial positioning of the rotor end cover assembly.

[0022] 4. Drive system: The drive system provides the main driving force to press the positioned rotor assembly into the stator housing.

[0023] The press-fitting drive device 1 is a press-fitting electric cylinder. Its cylinder body is fixed to the top of the frame (welded machine body 17) via the upper top plate 2. Its piston rod is connected downwards in sequence: first, it is fastened to the electric cylinder floating joint 3 by threads; the lower end of the electric cylinder floating joint 3 is connected to the transition rod 4 via a contoured groove; finally, the transition rod 4 is connected to the upper surface of the upper slide table 16 by screws. Therefore, the extension action of the press-fitting electric cylinder 1 can drive the entire upper slide table 16 to move downwards.

[0024] 5. Counterweight system: The counterweight system is used to balance the weight of the upper slide 16 and all the components installed on it, making the pressing process more stable.

[0025] Counterweight device: mainly includes counterweight cylinder 19. The cylinder body of counterweight cylinder 19 is connected to the upper top plate 2 by screws. Its piston rod faces downward and is fastened to cylinder connector 18 by threads, and cylinder connector 18 is connected to upper slide table 16 by screws.

[0026] 6. Feeding system: The feeding system realizes the automatic conveying of rotor end cover components.

[0027] Rotor feeding slide 7: Its uprights are welded together and mounted on the base 10 with screws, located to the side of the lower slide 11. It is used to horizontally transport the rotor end cover assembly that has completed its initial positioning to the "assembly preparation station on the lower slide 11", which is located directly below the first rotor positioning mandrel 6. After the transport is completed, the slide can be horizontally retracted to make room for vertical pressing.

[0028] The method for assembling the stator and rotor using the above-mentioned assembly mechanism includes the following steps: In the initial state, the locking cylinder 14 is in the extended position, the C-type mechanism is fully open, and the press-fit electric cylinder 1 and the counterweight cylinder 19 are both in the fully retracted position. The rotor and end cap are manually fed to the feeding slide 7 and initially positioned. The slide moves horizontally to send the rotor end cap directly below the first rotor positioning spindle 6. The locking cylinder 14 retracts, and the sliding table 11 and the second rotor positioning spindle 9 move upward synchronously, lifting the rotor and end cover assembly to the lower end face of the end cover limiting assembly 5 and the first rotor positioning spindle 6 and disengaging from the rotor feeding slide table 7. The rotor feeding slide 7 is reset, the locking cylinder 14 locks the lower slide 11 and the upper slide 16, and the pressing electric cylinder 1 and the counterweight cylinder 19 extend simultaneously to press the rotor assembly into the stator. The locking cylinder 14 is unlocked and extended, while the pressing electric cylinder 1 and the counterweight cylinder 19 are retracted and returned to their original positions, allowing the pallet to be released.

[0029] Although the present invention has been disclosed above with reference to embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various different choices and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention is defined by the claims and their equivalents.

Claims

1. A stator-rotor assembly mechanism resistant to strong magnetic attraction, characterized in that, include: Rack (17); The upper slide (16) is connected to the frame (17) via the upper guide rail slider (15) and can slide in the vertical direction; The lower slide (11) is connected to the frame (17) via the lower guide rail slider (12) and can slide in the vertical direction. The lower slide (11) is arranged opposite to the upper slide (16). The drive locking device (14) has its cylinder body fixedly connected to the upper slide (16), and its piston rod end is connected to the lower slide (11) through the cylinder floating joint (13). It is used to drive the upper slide (16) and the lower slide (11) to move towards or away from each other. The drive locking device (14) has a locked state to form a rigid connection between the upper slide (16) and the lower slide (11). The upper positioning component is disposed on the upper slide (16) and is used to position the upper end of the rotor end cover assembly; The lower positioning component is disposed on the lower slide (11) and is used to position the lower end of the rotor end cover assembly; A press-fitting drive device (1) includes a cylinder and a piston rod. The cylinder is fixed to the top of the frame via an upper top plate (2). The piston rod is connected downwards to the upper slide (16) via an electric cylinder floating joint (3) and a transition rod (4), thereby driving the upper slide (16) to move downwards. The rotor feeding slide (7) is set on the base (10) and located on the side of the lower slide (11) for conveying the rotor end cover assembly to the assembly preparation station on the lower slide (11); when the lower slide (11) moves upward to the assembly position, the lower positioning component and the upper positioning component jointly define the assembly station for clamping and positioning the rotor end cover assembly.

2. The stator-rotor assembly mechanism against strong magnetic attraction according to claim 1, characterized in that, The upper positioning component includes an end cap limiting component (5) and a first rotor positioning mandrel (6). The end cap limiting component (5) is fixed to the lower end face of the upper slide (16). The first rotor positioning mandrel (6) is coaxially fastened to the end cap limiting component (5) and extends downward to be inserted into the upper center hole of the rotor end cap component for positioning.

3. The stator and rotor assembly mechanism against strong magnetic attraction according to claim 2, characterized in that, The lower positioning component is a second rotor positioning mandrel (9), which is coaxially fixed to the upper end face of the lower slide (11) and extends upward to be inserted into the lower center hole of the rotor end cover assembly, and together with the upper positioning component, completes the upper and lower coaxial positioning of the rotor end cover assembly.

4. The stator and rotor assembly mechanism against strong magnetic attraction according to claim 1, characterized in that, The drive locking device (14) is a locking cylinder that can automatically lock at the end of the stroke, so that the upper slide (16) and the lower slide (11) are rigidly connected as one unit to resist the strong magnetic attraction between the stator and rotor during assembly.

5. The stator and rotor assembly mechanism against strong magnetic attraction according to claim 1, characterized in that, It also includes a counterweight device, which includes a counterweight cylinder (19). The counterweight cylinder (19) includes a cylinder body and a piston rod. The cylinder body is connected to the upper top plate (2), and the piston rod is connected to the upper slide (16) through a cylinder connector (18) to balance the weight of the upper slide (16) and its connecting parts.

6. A method for assembling a stator and rotor, employing a stator and rotor assembly mechanism against strong magnetic attraction as described in any one of claims 1-5, characterized in that, Includes the following steps: S1: The rotor end cover assembly is transported to the assembly station by the rotor feeding slide (7). At this time, the rotor end cover assembly is located between the upper positioning assembly and the lower positioning assembly. S2: Control the drive locking device (14) to move, drive the lower slide (11) to move upward, so that the lower positioning component pushes the rotor end cover component away from the rotor feeding slide (7) and together with the upper positioning component completes the clamping and positioning; S3: The rotor feeding slide (7) is horizontally withdrawn to make room for axial space; S4: Place the drive locking device (14) in the locked state, so that the upper slide (16) and the lower slide (11) are rigidly connected to form a self-locking C-shaped frame; S5: Simultaneously control the press-fitting drive device (1) and the counterweight cylinder (19) to extend, drive the upper slide (16) and lower slide (11) which are in the locked state to move downward as a whole, and press the rotor assembly into the stator housing assembly (8). S6: Release the locking state of the drive locking device (14) and control its drive slide (11) to move downward to reset; S7: Simultaneously control the press-fitting drive device (1) and the counterweight cylinder (19) to retract, driving the upper slide (16) to move upward and reset.

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