A motor rotor commutator assembly device

Abstract

The application relates to the technical field of motor manufacturing, in particular to a motor rotor commutator assembling device which solves the problems of poor positioning stability, easy circumferential shaking and eccentricity during pressing in the prior art. The motor rotor commutator assembling device comprises an assembling frame, an internal mounting frame and a lifting plate, the internal mounting frame is internally provided with a lower pressing column head at the top, the lifting plate is provided with a rotor placing half cylinder, a fixed half ring and a rotatable half ring are arranged at the top of one side of the rotor placing half cylinder, the inner rings of the two half rings are provided with pneumatic telescopic contact structures and are connected with gas feeding structures, and a synchronous centering contact structure is arranged on the outer ring of a commutator placing cylinder. Through cooperation of the double half ring structure, the pneumatic contact and the synchronous centering structure, coaxial centering fixing and stable pressing of the rotor and the commutator are realized.

Description

Technical Field

[0001] This invention relates to the field of motor manufacturing technology, and in particular to a motor rotor commutator assembly device. Background Technology

[0002] As a core driving component in industrial manufacturing and automated equipment, the assembly quality of electric motors directly affects the stability and energy efficiency of the entire machine. In the motor manufacturing process, the precise mating and pressing of the rotor and commutator are crucial steps determining the motor's electrical performance and mechanical strength. Therefore, motor rotor commutator assembly equipment holds a vital position in related industries. As a key link in the motor manufacturing process, its assembly accuracy and processing quality have a decisive impact on the overall operating performance, lifespan, and operational safety of the motor. Especially in the core step of pressing and mating the rotor and commutator, existing equipment or technologies are gradually revealing significant limitations when handling components or scenarios with specific requirements.

[0003] For example, Chinese patent document CN216981737U discloses a DC rotor commutator press-fit fixture. The fixture includes a rotor positioning fixture, a commutator positioning fixture, and a base fixture. The inner wall of the rotor positioning fixture is fixedly connected to the outer wall of the base fixture, and the inner wall of the rotor positioning fixture is fixedly connected to the inner wall of the commutator positioning fixture. The base fixture includes a positioning plate and a rotor plate slot rotatably connected to its top. The press-fit angle of the rotor commutator is adjusted by rotating the rotor plate slot, thereby achieving multiple positioning and fixing.

[0004] While this structure allows for flexible adjustment of the pressing angle and convenient basic positioning under multiple fixation conditions, in actual use, when pressing the rotor and commutator together, the commutator must first be placed at the bottom of the pressing station, and then the rotor is placed on top of the pressing station. However, the existing tooling for placing the rotor has poor stability in rotor positioning and cannot guarantee that the rotor will not wobble in the circumferential direction after it is placed, thus failing to guarantee the accuracy of pressing.

[0005] Therefore, given the shortcomings of existing technologies, we urgently need a motor rotor commutator assembly device to solve this problem. This new technology or equipment should improve production efficiency and quality, while better meeting specific modern production or usage needs, providing strong support for the sustainable development of related industries. Summary of the Invention

[0006] The purpose of this invention is to provide a motor rotor commutator assembly device, which solves the problem that the existing tooling for placing rotors has poor stability in rotor positioning and cannot guarantee that the rotor will not wobble in the circumferential direction after placement, thus failing to guarantee the accuracy of press-fitting.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: An assembly device for a motor rotor commutator includes an assembly frame, an internal mounting frame installed inside the assembly frame, and a lifting plate disposed inside the internal mounting frame. A pressing head is provided at the top inner part of the internal mounting frame, and the pressing head is connected to the top of the internal mounting frame via a vertical lifting structure. Lifting rods disposed inside the internal mounting frame are slidably connected to both ends of the lifting plate. Moving plates that slidably engage with the lifting rods are connected to both sides of the pressing head. A top spring is connected between the bottom of the moving plates and the lifting plate, and a bottom spring is connected between the bottom end of the lifting rods and the lifting plate. Support columns for contacting the bottom of the lifting plate are connected to both sides of the bottom inner part of the internal mounting frame. The inner bottom center of the internal mounting bracket is provided with a commutator placement cylinder for placing the commutator, and the top of the lifting plate is connected to a rotor placement half cylinder for placing the rotor. The top of the lifting plate is provided with a circular opening corresponding to the rotor placement half cylinder. A fixed semicircular ring is connected to the top side of the rotor placement half-cylinder. A rotatable semicircular ring is rotatably connected to one side of the fixed semicircular ring via two rotating hinges. The inner rings of both the fixed and rotatable semicircular rings are provided with several pneumatically retractable contact structures. An air supply structure is provided on one side of the fixed semicircular ring for cooperating with the several pneumatically retractable contact structures. The outer ring of the commutator placement cylinder is provided with a synchronous, centrally located, abutting structure for cooperating with the interior of the commutator placement cylinder.

[0008] Preferably, the vertical lifting structure includes a lifting cylinder installed on the top of the internal mounting frame. The output end of the lifting cylinder is connected to the top of the pressing column. A gripping handle is fixedly connected to the center of one side of the rotatable semi-circular ring. Limiting support plates for contacting the bottom of the rotatable semi-circular ring are fixedly connected to both sides of the bottom of the fixed semi-circular ring.

[0009] Preferably, both the fixed semicircular ring and the rotatable semicircular ring are connected to a top cover, and the top of the top cover is connected to a magnetic suction plate.

[0010] Preferably, the inner wall of the commutator placement cylinder has several internal grooves that penetrate the side wall of the commutator placement cylinder. Each internal groove is slidably connected to an abutment rod. A side plate is connected to the top of one side and the bottom of one side of the abutment rod. A return spring is connected between the side plate and the side wall of the commutator placement cylinder.

[0011] Preferably, both the rotatable and fixed semicircular rings have arc-shaped chambers inside. The air supply structure includes an air supply pipe that communicates with the interior of the arc-shaped chamber and is connected to the side wall of the fixed semicircular ring. Connecting hoses are provided on both sides between the fixed and rotatable semicircular rings, and both ends of the connecting hoses are connected to the adjacent arc-shaped chambers.

[0012] Preferably, the pneumatically retractable contact structure includes a piston cylinder with one end passing through a rotatable or fixed semicircular ring and communicating with the interior of an adjacent arc-shaped cavity, and a movable column cooperating with the piston cylinder. One end of the movable column is connected to a piston plate adapted to the interior of the piston cylinder, and the other end is provided with a contact head.

[0013] Preferably, one end of the movable column has a movable cavity inside, and the outer ring of the movable column has several sliding grooves communicating with the inside of the movable cavity. The movable cavity has a movable circular plate inside, and the outer ring of the movable circular plate is connected to several sliding plates that are adapted to the sliding grooves. One side of the movable circular plate is connected to the inner wall of the movable cavity through a buffer spring, and the other side is fixedly connected to a central cylinder that slides through the end of the movable column. One end of the central cylinder is fixedly connected to the side wall of the contact head.

[0014] Preferably, the outer ring of the movable column is connected to several guide plates, and one side of the contact head is connected to several guide rods, one end of which slides with the guide plates.

[0015] Preferably, one end of the abutment rod has a rotating groove, and a contact wheel is rotatably connected inside the rotating groove. A bottom mounting ring is connected to the bottom of the outer ring of the commutator placement cylinder. An external threaded cylinder that fits against the outer ring of the commutator placement cylinder is connected to the top of the bottom mounting ring. An internal threaded ring is threadedly connected to the outer ring of the external threaded cylinder. A rotating ring is rotatably connected to the top of the internal threaded ring. An inclined rod is provided on one side of each contact wheel. The bottom side of the inclined rod is connected to the top of the rotating ring through a fixing rod. A vertical groove is provided on one side of the top of the inclined rod. A vertical rod is slidably connected inside the vertical groove. The bottom end of the vertical rod is connected to the side wall of the bottom mounting ring through a fixing plate.

[0016] Preferably, the inclined rod has a guide groove that mates with the contact wheel on the side near the contact wheel, and a rubber block is connected to one end of the abutment rod near the inside of the commutator placement cylinder.

[0017] The present invention has the following beneficial effects: This solution solves the problems of poor stability of rotor positioning fixtures and easy circumferential shaking of rotors in existing technologies by setting an openable and closable enclosure structure composed of a fixed semicircular ring and a rotatable semicircular ring above the rotor placement half-cylinder, combined with a pneumatic retractable contact structure and an air supply structure. It achieves a surrounding grip and automatic centering positioning of the rotor's outer circumference without hindering the loading and unloading of the rotor. At the same time, combined with the synchronous centering contact structure of the outer ring of the commutator placement cylinder, it ensures that the commutator and rotor are in a coaxial and centered state before pressing, eliminating the pressing misalignment caused by axial deviation or shaking. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the top and bottom spring structures of the present invention; Figure 3 This is a schematic diagram of the rotatable and fixed semicircular ring structures of the present invention; Figure 4 This is a schematic diagram of the piston cylinder and moving column structure of the present invention; Figure 5 This is a schematic diagram of the lifting plate and circular opening structure of the present invention; Figure 6 This is a schematic diagram of the top cover and magnetic suction plate structure of the present invention; Figure 7 This is a schematic diagram of the arc-shaped chamber structure of the present invention; Figure 8 This is a schematic diagram of the central cylinder and buffer spring structure of the present invention; Figure 9 This is a schematic diagram of the contact rod and contact wheel structure of the present invention; Figure 10 This is a schematic diagram of the diagonal and vertical rod structures of the present invention.

[0020] In the diagram: 1. Assembly frame; 2. Internal mounting bracket; 3. Rotor placement half-cylinder; 4. Lifting plate; 5. Commutator placement cylinder; 6. Lifting cylinder; 7. Downward pressure column head; 8. Lifting rod; 9. Top spring; 10. Bottom spring; 11. Rotatable semi-circular ring; 12. Fixed semi-circular ring; 13. Air supply pipe; 14. Piston cylinder; 15. Moving column; 16. Contact head; 17. Circular opening; 18. Support column; 19. Grip handle; 20. Support rod; 21. Connecting hose; 22. 23. Top cover; 24. Magnetic plate; 25. Rotating hinge; 26. Arc-shaped chamber; 27. Central cylinder; 28. Piston plate; 29. ​​Sliding groove; 30. Guide plate; 31. Buffer spring; 32. Guide rod; 33. Sliding plate; 34. Internal groove; 35. Vertical rod; 36. Fixing plate; 37. Bottom mounting ring; 38. External threaded cylinder; 39. Internal threaded ring; 40. Contact wheel; 41. Abutment rod; 42. Return spring; 43. Side plate; 44. Angled rod; 45. Rotating ring. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0022] Example 1 Please see Figure 1 , Figure 2 and Figure 5 As shown, a motor rotor commutator assembly device of this embodiment includes an assembly frame 1, an internal mounting frame 2 installed inside the assembly frame 1, and a lifting plate 4 disposed inside the internal mounting frame 2. A pressing head 7 is provided at the inner top of the internal mounting frame 2, and the pressing head 7 is connected to the top of the internal mounting frame 2 via a vertical lifting structure. Both ends of the lifting plate 4 are slidably connected to lifting rods 8 disposed inside the internal mounting frame 2. Movable plates that slidably cooperate with the lifting rods 8 are connected to both sides of the pressing head 7. A top spring 9 is connected between the bottom of the movable plate and the lifting plate 4, and a bottom spring 10 is connected between the bottom end of the lifting rod 8 and the lifting plate 4. Support columns 18 for contacting the bottom of the lifting plate 4 are connected to both sides of the inner bottom of the internal mounting frame 2.

[0023] Please see Figure 1 , Figure 3 and Figure 5 As shown, a commutator placement cylinder 5 for placing the commutator is provided at the center of the inner bottom of the internal mounting bracket 2, and a rotor placement half-cylinder 3 for placing the rotor is connected to the top of the lifting plate 4. A circular opening 17 corresponding to the rotor placement half-cylinder 3 is provided on the top of the lifting plate 4.

[0024] Please see Figure 3 , Figure 4 and Figure 6 As shown, a fixed semicircular ring 12 is connected to the top side of the rotor placement half-cylinder 3. A rotatable semicircular ring 11 is rotatably connected to one side of the fixed semicircular ring 12 via two rotating hinges 24. The inner rings of both the fixed semicircular ring 12 and the rotatable semicircular ring 11 are provided with several pneumatically retractable abutment structures. An air supply structure is provided on one side of the fixed semicircular ring 12. The air supply structure is used to cooperate with several pneumatically retractable abutment structures.

[0025] The outer ring of the commutator placement cylinder 5 is provided with a synchronous centering abutment structure, which is used to cooperate with the interior of the commutator placement cylinder 5.

[0026] Structural assembly and spatial fit: Please see Figure 1 , Figure 2 and Figure 5 As shown, the frame and guide: the assembly frame 1 and the internal mounting frame 2 are rigidly connected by bolts to form a load-bearing skeleton. The lifting rod 8 is symmetrically and vertically fixed to the inside of the internal mounting frame 2 on both sides. The guide holes at both ends of the lifting plate 4 are inlaid with oilless self-lubricating linear bearings, which form a precision sliding fit with the lifting rod 8 with a clearance of 0.01-0.02mm to prevent the lifting plate 4 from tilting and jamming during the lifting process.

[0027] Please see Figure 2 and Figure 5 As shown, the stiffness relationship of the graded buffer springs is as follows: the top spring 9 is sleeved on the outer periphery of the lifting rod 8, between the moving plate and the upper surface of the lifting plate 4; the bottom spring 10 is sleeved on the lower end of the lifting rod 8, between the lower surface of the lifting plate 4 and the shoulder limiting surface at the bottom of the lifting rod 8. The stiffness of the top spring 9 is 5–10 N / mm, and the stiffness of the bottom spring 10 is 20–30 N / mm. During assembly, the top spring 9 is pre-compressed by 3 mm and the bottom spring 10 is pre-compressed by 1 mm, forming a clear graded elastic response logic of "low pressure vibration absorption first, then high pressure compression" in the structure.

[0028] Please see Figure 1 , Figure 3 and Figure 5 As shown, the coaxiality reference line is as follows: the bottom of the commutator placement cylinder 5 is provided with an integrated positioning stop, which is interference-fitted with the center positioning boss on the inner bottom surface of the internal mounting bracket 2; the bottom of the rotor placement half cylinder 3 is provided with a coaxial positioning flange, the lower end of the flange extends into the circular opening 17 and is precisely positioned with the lifting plate 4. The axis of the circular opening 17 at the bottom of the rotor placement half cylinder 3, the axis of the commutator placement cylinder 5, and the vertical downward movement axis of the lower pressure column 7 are coaxial in height, and the coaxiality tolerance is controlled within ≤0.02mm.

[0029] A displacement sensor is installed on the side of the pressing head 7 to collect the pressing depth in real time. An adjustable mechanical limit block is set in the middle of the internal mounting bracket 2 to limit the maximum downward stroke of the pressing head 7. With dual protection of electrical limit and mechanical limit, the lifting cylinder 6 automatically locks after the predetermined pressing depth is reached.

[0030] Complete pressing action and transmission process: Please see Figure 3 and Figure 6 As shown, loading and enclosure: The rotatable semicircular ring 11 is rotated 90° to the side along the rotating hinge 24 to avoid the lateral loading opening of the rotor placement half cylinder 3. The rotor shaft of the motor rotor is passed downward through the circular opening 17 and the rotor core is placed inside the rotor placement half cylinder 3. Then the rotatable semicircular ring 11 is rotated in the opposite direction and docked with the fixed semicircular ring 12 to form a closed ring.

[0031] Please see Figure 6 , Figure 7 and Figure 9 As shown, pneumatic and mechanical synchronous centering activates the air supply structure. The air source (working pressure 0.4-0.6MPa) supplies air to the pneumatic retractable contact structure of the inner ring of the fixed semi-circular ring 12 and the rotatable semi-circular ring 11 through a two-position five-way solenoid directional valve. The controller timing logic is set as follows: First, manually tighten the internal threaded ring 38 to complete the pre-centering clamping of the directional switch (signal triggers the pressure sensor). Second, the solenoid directional valve is energized to supply air, and the pneumatic retractable contact structure extends to clamp the rotor. The pressure is maintained for 0.8–1.2s to confirm that the centering is in place. Third, the solenoid valve of the lifting cylinder 6 is energized to drive the lowering column head 7 to press down. After the pressing is completed, the lifting cylinder 6 first resets, and after a delay of 0.5s, the air circuit is depressurized, and the contact structure retracts.

[0032] Among them, the cylinder drive source used in the vertical lifting structure, the air pump involved in the air supply structure, the electromagnetic reversing valve and the pressure regulating valve are all commercially available standard parts, and their action sequence is controlled by an external controller using conventional logic.

[0033] Workflow: During the press-fitting of the motor rotor and commutator, the operator first places the commutator inside the commutator placement cylinder 5 at the bottom of the internal mounting bracket 2, and simultaneously places the motor rotor inside the rotor placement half-cylinder 3 at the top of the lifting plate 4. Before this, the rotatable semi-circular ring 11 is rotated upwards or sideways to the top position of the fixed semi-circular ring 12 via the rotating hinge 24, thereby avoiding obstruction of the lateral opening of the rotor placement half-cylinder 3, allowing the motor rotor to be smoothly placed into the rotor placement half-cylinder 3 and pass through the circular opening 17 on the lifting plate 4. After the motor rotor is in place, the rotatable semi-circular ring 11 is rotated via the rotating hinge 24 to return it to the position where it is aligned with the fixed semi-circular ring 12, together forming a surrounding structure around the motor rotor. Subsequently, the air supply structure is activated, supplying air to several pneumatically retractable contact structures within the inner rings of the fixed semicircular ring 12 and the rotatable semicircular ring 11. This causes the pneumatically retractable contact structures to extend inward, encircling and clamping the motor rotor from multiple directions, stably and centrally fixing the motor rotor in the center of the enclosed space. Simultaneously, the synchronously centered contact structure located on the outer ring of the commutator placement cylinder 5 activates, synchronously centeredly contacting and positioning the commutator inside the commutator placement cylinder 5, ensuring that the commutator and the motor rotor are on the same axis. Subsequently, the vertical lifting structure drives the downward pressure column 7 to move downward. The downward pressure column 7 contacts the top of the motor rotor and continuously applies downward pressure, causing the motor rotor and the lifting plate 4 to move synchronously downward along the lifting rod 8. During the downward movement, the top spring 9 located between the moving plate and the lifting plate 4 is pre-compressed and contracted. As the downward pressure further increases and the lifting plate 4 contacts the support column 18, the bottom spring 10 located between the bottom end of the lifting rod 8 and the lifting plate 4 contracts accordingly, so that the lower end of the motor rotor is smoothly and accurately inserted into the assembly hole of the commutator. Finally, under the continuous downward pressure, the motor rotor and the commutator are tightly pressed together.

[0034] When the top spring 9 is elastically compressed, it absorbs the initial contact impact force and drives the lifting plate 4, the rotor placement half cylinder 3, the two semi-circular rings and the tightly clamped rotor to move down synchronously; the air supply pipe 13 is equipped with a telescopic corrugated floating section, and the connecting hose 21 is reserved for vertical lifting margin, and moves down synchronously with the lifting plate 4 to avoid stretching and leakage of the air pipeline.

[0035] It should be noted that the drive cylinder or electric drive mechanism included in the above-mentioned vertical lifting structure, the commercially available air source pump and control valve body involved in the air supply structure, and other electrical and pneumatic components are all well-known prior art that is familiar to those skilled in the art. Here, their functions are directly used and combined in a conventional manner.

[0036] Example 2 Please see Figure 1 , Figure 5 and Figure 6As shown, this embodiment of a motor rotor commutator assembly device includes a vertical lifting structure comprising a lifting cylinder 6 mounted on the top of an internal mounting bracket 2. The output end of the lifting cylinder 6 is connected to the top end of a downward pressing column 7. A gripper 19 is fixedly connected to the center of one side of a rotatable semi-circular ring 11. Limiting support plates are fixedly connected to both sides of the bottom of a fixed semi-circular ring 12. The limiting support plates are used to contact the bottom of the rotatable semi-circular ring 11 and serve as a primary reference for positioning, ensuring that the two semi-rings are horizontally coaxial after closure. The bottom of the fixed semi-circular ring 12 is connected to the side wall of the rotor placement half-cylinder 3 via several support rods 20. Specifically, through the setting of lifting cylinder 6, grip handle 19 and limiting support plate, the lifting cylinder 6 drives the pressing column head 7 to rise and fall precisely. The operator can use the grip handle 19 to smoothly flip the rotatable semi-circular ring 11, and the limiting support plate can stably support the rotatable semi-circular ring 11 in the closed state, thereby improving the convenience of operation and the stability of structural closure support.

[0037] Please see Figure 9 As shown, the inner wall of the commutator placement cylinder 5 has several internal grooves 33 that penetrate the side wall of the commutator placement cylinder 5. Each internal groove 33 has a slidingly connected abutment rod 40. A side plate 42 is connected to the top and bottom of one side of the abutment rod 40. A return spring 41 is connected between the side plate 42 and the side wall of the commutator placement cylinder 5. Specifically, through the arrangement of the internal groove 33, the abutment rod 40, the side plate 42 and the return spring 41, the abutment rod 40 slides out in the internal groove 33 to abut the commutator. After the abutment is released, it is pulled by the side plate 42 and smoothly retracted under the elastic force of the return spring 41, thus achieving the effect of elastic clamping and smooth reset of the commutator.

[0038] Please see Figure 9 and Figure 10 As shown, one end of the contact rod 40 has a rotating groove, and a contact wheel 39 is rotatably connected inside the rotating groove. A bottom mounting ring 36 is connected to the bottom of the outer ring of the commutator placement cylinder 5. The top of the bottom mounting ring 36 is connected to an externally threaded cylinder 37 that fits snugly against the outer ring of the commutator placement cylinder 5. An internally threaded ring 38 is threadedly connected to the outer ring of the externally threaded cylinder 37, and a rotating ring 44 is rotatably connected to the top of the internally threaded ring 38. An inclined rod 43 is obliquely arranged on one side of each contact wheel 39. The bottom side of the inclined rod 43 is connected to the top of the rotating ring 44 via a fixing rod. A vertical groove is formed on one side of the top of the inclined rod 43, and a vertical rod 34 is slidably connected inside the vertical groove, with a 0.01~0.03mm gap between the vertical groove and the vertical rod 34. The bottom end of the vertical rod 34 is connected to the side wall of the bottom mounting ring 36 via a fixing plate 35.

[0039] Specifically, by setting up the contact wheel 39, bottom mounting ring 36, external threaded cylinder 37, internal threaded ring 38, rotating ring 44, inclined rod 43, vertical groove, vertical rod 34 and fixing plate 35, the internal threaded ring 38 is rotated to move up and down along the external threaded cylinder 37, which drives the rotating ring 44 and inclined rod 43 to rise and fall. The inclined rod 43 presses the contact wheel 39 through the inclined surface to make the contact rod 40 move inward synchronously, and the vertical rod 34 slides in the vertical groove to restrict the circumferential rotation of the inclined rod 43, thus achieving the effect of multi-point synchronous pitch adjustment and centering clamping of the commutator.

[0040] Please see Figure 9 and Figure 10 As shown, the inclined rod 43 has a guide groove on the side near the contact wheel 39 that mates with the contact wheel 39, and the inclination angle of the guide groove is 20-30°. A rubber block is connected to one end of the abutment rod 40 near the inside of the commutator housing cylinder 5. Specifically, through the guide groove on the side of the inclined rod 43 and the rubber block at the end of the abutment rod 40, the guide groove provides smooth guidance for the rolling of the contact wheel 39, and the rubber block provides anti-slip and cushioning protection when abutting the commutator, thus improving the smoothness of mechanical transmission and preventing scratches on the commutator surface layer.

[0041] Mechanical transmission of the commutator centering mechanism: Please see Figure 9 and Figure 10 As shown, the threaded, thrust bearing, and wedge drive chain are as follows: the bottom mounting ring 36 is coaxially fixed to the bottom of the commutator placement cylinder 5, the external threaded cylinder 37 is fixed on the bottom mounting ring 36, the internal threaded ring 38 and the external threaded cylinder 37 are engaged by a trapezoidal thread, and the top of the internal threaded ring 38 is rotatably connected to the rotating ring 44 through a thrust ball bearing, ensuring that the internal threaded ring 38 only transmits axial lifting thrust when it rotates, while the rotating ring 44 remains circumferentially non-rotating.

[0042] Please see Figure 9 and Figure 10 As shown, the anti-rotation guide and inclined plane propulsion are as follows: the fixed plate 35 is fixed to the side wall of the bottom mounting ring 36, the vertical rod 34 is vertically fixed to the fixed plate 35, the vertical groove at the top of the inclined rod 43 is slidably engaged with the vertical rod 34 to form an anti-rotation sliding pair, which restricts the circumferential rotational freedom of the inclined rod 43 and only allows it to move up and down with the rotating ring 44. The side of the inclined rod 43 near the contact wheel 39 is machined with a guide groove with an inclination angle of 20°-30°. The contact wheel 39 is rolled in the rotating groove at the outer end of the contact rod 40 and embedded in the guide groove.

[0043] Please see Figure 9 and Figure 10As shown, the radial thrust and reset mechanism is as follows: The contact rods 40 are evenly distributed circumferentially along the side wall of the commutator placement cylinder 5 (e.g., 3 or 4 groups, at 120° or 90° intervals), sliding through the internal groove 33. The side plate 42 is fixed to the side wall of the contact rods 40. The reset spring 41 is located between the side plate 42 and the outer wall of the commutator placement cylinder 5. Rotating the internal threaded ring 38 causes it to move downwards along the external threaded cylinder 37, driving the rotating ring 44 and the inclined rod 43 to move vertically downwards. The inclined guide groove of the inclined rod 43 presses against the contact wheel 39, overcoming the tension of the reset spring 41, and pushing all the contact rods 40 to extend radially and synchronously along the internal groove 33. The wear-resistant polyurethane rubber block at the front end of the contact rod 40 abuts against the outer wall of the commutator, achieving coaxial centering and scratch-free clamping of the commutator. When the internal threaded ring 38 is rotated in the opposite direction, the inclined rod 43 rises, and the abutment rod 40 retracts radially outward under the tension of the return spring 41; the bottom surface of the commutator placement cylinder 5 is provided with an annular ejector spring, which slightly pushes the commutator upward when picking up the material, eliminating the adsorption friction between the rubber block and the outer wall of the commutator, and preventing the abutment rod 40 from getting stuck and the workpiece from being unable to be picked up.

[0044] Please see Figure 6 As shown, the rotor semi-ring support and the flipping positioning gripper 19 are fixed to the outer center of the rotatable semi-circular ring 11. Limiting support plates are fixed on both sides of the bottom surface of the fixed semi-circular ring 12. When the rotatable semi-circular ring 11 is closed around the rotating hinge 24, its lower surface contacts the upper surface of the limiting support plate, eliminating the cumulative sagging error caused by the hinge fit clearance and ensuring that the two semi-circular rings are in the same horizontal reference plane.

[0045] Example 3 Please see Figure 6 As shown in this embodiment, a motor rotor commutator assembly device has a top cover 22 connected to the top of both the fixed semi-circular ring 12 and the rotatable semi-circular ring 11. A magnetic suction plate 23 is connected to the top of the top cover 22. Specifically, through the top cover 22 and the magnetic suction plate 23, after the rotatable semi-circular ring 11 is flipped and closed in place, the magnetic suction plate 23 uses magnetic force to achieve rapid locking between the fixed semi-circular ring 12 and the top cover 22 of the rotatable semi-circular ring 11, thereby improving the reliability of the clamping structure's closed positioning and preventing accidental loosening during processing.

[0046] Please see Figure 6 and Figure 7As shown, both the rotatable semi-circular ring 11 and the fixed semi-circular ring 12 have arc-shaped chambers 25 inside. The air supply structure includes an air supply pipe 13 that communicates with the interior of the arc-shaped chamber 25 and is connected to the side wall of the fixed semi-circular ring 12. Connecting hoses 21 are provided on both sides between the fixed semi-circular ring 12 and the rotatable semi-circular ring 11, with both ends of the connecting hoses 21 connected to the adjacent arc-shaped chambers 25. Specifically, through the arrangement of the arc-shaped chambers 25, the air supply pipe 13, and the connecting hoses 21, high-pressure gas is introduced into the arc-shaped chamber 25 inside the fixed semi-circular ring 12 through the air supply pipe 13, and simultaneously introduced into the arc-shaped chamber 25 inside the rotatable semi-circular ring 11 through the connecting hoses 21, achieving a synchronous and balanced distribution of air pressure in the two semi-circular chambers.

[0047] Gas path connectivity and magnetic quick-lock arc-shaped chamber with flexible gas path: Please see Figure 6 and Figure 7 As shown, both the fixed semicircular ring 12 and the rotatable semicircular ring 11 have sealed arc-shaped chambers 25 inside. The air supply pipe 13 is connected to the arc-shaped chamber 25 of the fixed semicircular ring 12. A rotary air connector is provided at the joint of the arc-shaped chambers 25. The connecting hose 21 is made of highly flexible and pressure-resistant PU air pipe. Both ends are connected to the arc-shaped chambers 25 of the two semicircles through quick-connect couplings. The hose has an arc-shaped margin of more than 90° for the flipping trajectory to eliminate the problem of pipe twisting and pulling during flipping.

[0048] Please see Figure 6 As shown, the magnetic positioning and locking mechanism is as follows: the top cover 22 is fixed to the top surface of the two semi-circular rings, and the magnetic plate 23 is embedded in the mating end face of the top cover 22. It is made of strong magnetic neodymium iron boron (NdFeB) material, with a single magnetic plate size of 20×10×5mm and a mating adsorption force ≥80N. When the two semi-circles are in closed contact, the magnetic plate 23 achieves rapid self-centering and mating locking by magnetic attraction. The magnetic plate 23 only serves as a secondary auxiliary locking mechanism. The adsorption force only offsets the radial expansion force of the pneumatic contact structure and does not undertake the function of dimensional centering, thus eliminating stress interference between the upper and lower positioning structures.

[0049] Please see Figure 4 , Figure 7 and Figure 8As shown, the pneumatically retractable contact structure includes a piston cylinder 14 with one end penetrating a rotatable semicircular ring 11 or a fixed semicircular ring 12 and communicating with the interior of an adjacent arc-shaped chamber 25, and a movable column 15 cooperating with the piston cylinder 14. One end of the movable column 15 is connected to a piston plate 27 adapted to the interior of the piston cylinder 14. A piston plate return spring is connected to both the piston plate 27 and the interior of the piston cylinder 14. The other end is provided with a contact head 16. Specifically, through the arrangement of the piston cylinder 14, the movable column 15, the piston plate 27, and the contact head 16, the gas in the arc-shaped chamber 25 compresses the piston plate 27, causing the movable column 15 to push inward within the piston cylinder 14, so that the contact head 16 abuts against the outer wall of the motor rotor, achieving the effect of multi-point pneumatic clamping of the rotor using air pressure drive.

[0050] Please see Figure 8 As shown, a movable cavity is provided inside one end of the movable column 15. Several sliding grooves 28 communicating with the interior of the movable cavity are formed on the outer ring of the movable column 15. A movable circular plate is disposed inside the movable cavity. Several sliding plates 32 adapted to the sliding grooves 28 are connected to the outer ring of the movable circular plate. One side of the movable circular plate is connected to the inner wall of the movable cavity via a buffer spring 30, and the other side is fixedly connected to a central cylinder 26 that slides through the end of the movable column 15. One end of the central cylinder 26 is fixedly connected to the side wall of the contact head 16. The buffer spring 30 has a wire diameter of 1mm, a free length of 8mm, and a spring force of 3–5N, and is placed between the movable circular plate and the bottom surface of the movable cavity. Specifically, through the arrangement of the movable cavity, sliding groove 28, sliding plate 32, buffer spring 30 and central cylinder 26, the impact force received by the contact head 16 when it contacts the rotor is transmitted to the movable circular plate and sliding plate 32 through the central cylinder 26. The buffer spring 30 compresses and absorbs the vibration in the movable cavity, thereby achieving the effect of mitigating the rigid impact of the collision and protecting the rotor surface.

[0051] Please see Figure 8 As shown, the outer ring of the movable column 15 is connected to several guide plates 29, and one side of the contact head 16 is connected to several guide rods 31, one end of which slides with the guide plate 29. Specifically, through the setting of the guide plate 29 and the guide rods 31, the contact head 16 is guided by the guide rods 31 along the guide plate 29 during the telescopic movement, which achieves the effect of preventing the contact head 16 from deflecting or tilting and ensuring stable telescopic movement along the axial direction.

[0052] A dual flexible buffer clamping structure combining pneumatic and spring mechanisms: Please see Figure 7 and Figure 8As shown, the first pneumatic actuation involves a piston cylinder 14 fixedly mounted on the side wall of a semi-circular ring, with its inner cavity communicating with the arc-shaped chamber 25. A piston plate 27 is slidably sealed within the piston cylinder 14 and fixedly connected to a moving column 15. When high-pressure gas is introduced into the arc-shaped chamber 25, the gas pressure acts on the piston plate 27, pushing the moving column 15 to extend inwards. An annular limiting step is provided at the inner port of the piston cylinder 14 to limit the maximum inward extension stroke of the piston plate 27 by 3–5 mm. Combined with a buffer spring 30, this provides double protection, preventing the moving column 15 from overextending and rigidly damaging the outer wall of the rotor.

[0053] The guide rod 31 is fixed to the rear side of the contact head 16 and slides through the guide plate 29 on the outer wall of the moving column 15 to prevent the contact head 16 from circumferentially deflecting during the advancement process.

[0054] Please see Figure 8 As shown, the second layer of springs provides secondary vibration absorption: a movable cavity is provided inside the movable column 15, and the central cylinder 26 is slidably inserted through the front end of the movable column 15, with one end connected to the contact head 16 and the other end connected to the movable circular plate. The sliding plate 32 of the outer ring of the movable circular plate is slidably embedded in the sliding groove 28 of the tube wall of the movable column 15. The buffer spring 30 is placed between the movable circular plate and the bottom surface of the movable cavity. When the contact head 16 contacts the rotor surface, the initial impact force pushes the central cylinder 26 and the movable circular plate to compress the buffer spring 30. The sliding plate 32 slides backward along the sliding groove 28 to absorb the rigid collision impact force. Subsequently, the air pressure continues to push, causing the contact head 16 to hug the outer circle of the rotor at multiple points with constant flexible pressure, achieving automatic centering positioning without damage.

[0055] This solution includes the following workflow: Please see Figures 1 to 10As shown, during the press-fitting operation of the motor rotor and commutator, the operator first places the commutator inside the commutator placement cylinder 5 at the bottom of the internal mounting bracket 2, and simultaneously places the motor rotor inside the rotor placement half-cylinder 3 at the top of the lifting plate 4. Before this, the operator grips the rotatable semi-circular ring 11 with the grip handle 19, causing it to flip open around the rotating hinge 24, avoiding the side opening of the rotor placement half-cylinder 3, smoothly inserting the motor rotor and allowing it to pass through the circular opening 17. After it is in place, the rotatable semi-circular ring 11 is flipped back to its original position, and the magnetic suction plate 23 on the top cover 22 is used to... The fixed semi-circular ring 12 is locked in place, and the limiting support plate supports its bottom. Then, the air supply structure is activated, and high-pressure gas enters the arc-shaped chamber 25 inside the fixed semi-circular ring 12 through the air supply pipe 13, and is simultaneously introduced into the arc-shaped chamber 25 inside the rotatable semi-circular ring 11 through the connecting hose 21. The air pressure inside the chamber pushes the piston plate 27 and the moving column 15 to slide inside the piston cylinder 14. Under the guidance of the guide rod 31 and the guide plate 29, the contact head 16 extends inward to abut against the outer wall of the rotor. The impact during the contact process is absorbed by the central cylinder 26, the sliding plate 32, and the buffer spring 30. The motor rotor is stably and centrally clamped in the enclosed space. Simultaneously, the internal threaded ring 38 is rotated manually or via a drive component, causing it to rise and fall along the external threaded cylinder 37 on the bottom mounting ring 36. Under the limiting and guiding action of the vertical rod 34 and the vertical groove of the inclined rod 43, the inclined rod 43 is driven to rise and fall. The guide groove on the inclined rod 43 presses against the contact wheel 39, pushing several abutment rods 40 to overcome the resistance of the return spring 41 and slide synchronously inward in the internal groove 33. This causes the rubber blocks at their ends to synchronously and centrally clamp the commutator. Subsequently, the lifting cylinder 6 is activated, driving the downward pressing column 7 to move downward and abut against the top of the rotor. The rotor and lifting plate 4 move down synchronously along the lifting rod 8. The top spring 9 between the moving plate and the lifting plate 4 is pre-contracted for buffering. When the lifting plate 4 contacts the support column 18, the bottom spring 10 further contracts, so that the lower end of the rotor is accurately inserted into the commutator and the tight pressing is completed. After the operation is completed, the lifting cylinder 6 drives the working structure to reset. After the air pressure is released, the moving column 15 resets. The internal thread ring 38 is rotated in the opposite direction so that the abutment rod 40 retracts under the action of the reset spring 41. The magnetic suction plate 23 is opened and the rotatable semi-circular ring 11 is flipped so that the assembled rotor commutator can be easily taken out.

[0056] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A motor rotor commutator assembly device, characterized in that, include: The assembly frame (1), the internal mounting frame (2) installed inside the assembly frame (1), and the lifting plate (4) set inside the internal mounting frame (2) are provided with a pressing column head (7) at the top of the internal mounting frame (2). The pressing column head (7) is connected to the top of the internal mounting frame (2) through a vertical lifting structure. Both ends of the lifting plate (4) are slidably connected to the lifting rod (8) set inside the internal mounting frame (2). Both sides of the pressing column head (7) are connected to the moving plate that slides with the lifting rod (8). The bottom of the moving plate and the lifting plate (4) are connected together to the top spring (9). The bottom end of the lifting rod (8) and the lifting plate (4) are connected together to the bottom spring (10). Both sides of the bottom of the internal mounting frame (2) are connected to the support column (18) for contacting the bottom of the lifting plate (4). The inner bottom center of the internal mounting bracket (2) is provided with a commutator placement cylinder (5) for placing the commutator, and the top of the lifting plate (4) is connected to a rotor placement half cylinder (3) for placing the rotor. The top of the lifting plate (4) is provided with a circular opening (17) corresponding to the rotor placement half cylinder (3). A fixed semicircular ring (12) is connected to the top side of the rotor placement half cylinder (3). A rotatable semicircular ring (11) is rotatably connected to one side of the fixed semicircular ring (12) through two rotating hinges (24). The inner rings of the fixed semicircular ring (12) and the rotatable semicircular ring (11) are provided with several pneumatic retractable contact structures. An air supply structure is provided on one side of the fixed semicircular ring (12) for cooperating with several pneumatic retractable contact structures. The outer ring of the commutator placement cylinder (5) is provided with a synchronous centering contact structure for cooperating with the interior of the commutator placement cylinder (5).

2. The motor rotor commutator assembly device according to claim 1, characterized in that, The vertical lifting structure includes a lifting cylinder (6) installed on the top of the internal mounting frame (2). The output end of the lifting cylinder (6) is connected to the top of the pressing column (7). A gripper (19) is fixedly connected to the center of one side of the rotatable semi-circular ring (11). Limiting support plates for contacting the bottom of the rotatable semi-circular ring (11) are fixedly connected to both sides of the bottom of the fixed semi-circular ring (12).

3. The motor rotor commutator assembly device according to claim 1, characterized in that, The top of both the fixed semicircular ring (12) and the rotatable semicircular ring (11) is connected to a top cover (22), and the top of the top cover (22) is connected to a magnetic suction plate (23).

4. The motor rotor commutator assembly device according to claim 2, characterized in that, The inner wall of the commutator placement cylinder (5) has several internal grooves (33) that penetrate the side wall of the commutator placement cylinder (5). Each internal groove (33) is slidably connected to an abutment rod (40). A side plate (42) is connected to the top of one side and the bottom of one side of the abutment rod (40). A return spring (41) is connected between the side plate (42) and the side wall of the commutator placement cylinder (5).

5. The motor rotor commutator assembly device according to claim 3, characterized in that, Both the rotatable semicircular ring (11) and the fixed semicircular ring (12) have arc-shaped chambers (25) inside. The air supply structure includes an air supply pipe (13) that communicates with the inside of the arc-shaped chamber (25) and is connected to the side wall of the fixed semicircular ring (12). Both sides of the fixed semicircular ring (12) and the rotatable semicircular ring (11) are provided with connecting hoses (21), and both ends of the connecting hoses (21) are connected to the adjacent arc-shaped chambers (25).

6. The motor rotor commutator assembly device according to claim 5, characterized in that, The pneumatic retractable contact structure includes a piston cylinder (14) with one end passing through a rotatable semi-circular ring (11) or a fixed semi-circular ring (12) and communicating with the interior of an adjacent arc-shaped chamber (25) and a movable column (15) cooperating with the piston cylinder (14). One end of the movable column (15) is connected to a piston plate (27) adapted to the interior of the piston cylinder (14), and the other end is provided with a contact head (16).

7. The motor rotor commutator assembly device according to claim 6, characterized in that, The movable column (15) has a movable cavity inside one end. The outer ring of the movable column (15) has several sliding grooves (28) that communicate with the inside of the movable cavity. The movable cavity has a movable circular plate inside. The outer ring of the movable circular plate is connected to several sliding plates (32) that are adapted to the sliding grooves (28). One side of the movable circular plate is connected to the inner wall of the movable cavity through a buffer spring (30). The other side is fixedly connected to a central cylinder (26) that slides through the end of the movable column (15). One end of the central cylinder (26) is fixedly connected to the side wall of the contact head (16).

8. The motor rotor commutator assembly device according to claim 7, characterized in that, The outer ring of the movable column (15) is connected to several guide plates (29), and one side of the contact head (16) is connected to several guide rods (31) with one end slidingly engaged with the guide plate (29).

9. A motor rotor commutator assembly device according to claim 4, characterized in that, One end of the contact rod (40) is provided with a rotating groove, and a contact wheel (39) is rotatably connected inside the rotating groove. The bottom of the outer ring of the commutator placement cylinder (5) is connected with a bottom mounting ring (36). The top of the bottom mounting ring (36) is connected with an external threaded cylinder (37) that fits against the outer ring of the commutator placement cylinder (5). The outer ring of the external threaded cylinder (37) is threadedly connected with an internal threaded ring (38). The top of the internal threaded ring (38) is rotatably connected with a rotating ring (44). An inclined rod (43) is provided on one side of each contact wheel (39). The bottom side of the inclined rod (43) is connected to the top of the rotating ring (44) through a fixing rod. A vertical groove is provided on one side of the top end of the inclined rod (43). A vertical rod (34) is slidably connected inside the vertical groove. The bottom end of the vertical rod (34) is connected to the side wall of the bottom mounting ring (36) through a fixing plate (35).

10. A motor rotor commutator assembly device according to claim 9, characterized in that, The inclined rod (43) has a guide groove on the side near the contact wheel (39) that cooperates with the contact wheel (39), and the abutment rod (40) has a rubber block connected to one end near the inside of the commutator placement cylinder (5).

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