Rotor polishing device for coreless motor production

By combining magnetorheological fluid and rubber airbags with an adjustable polishing assembly, the problems of uneven clamping and poor inner diameter adaptability of the hollow cup motor rotor are solved, achieving stable clamping and efficient polishing.

CN223719197UActive Publication Date: 2025-12-26SHENZHEN XINLINGHANG MOTOR CO LTD
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Patent Information

Application Number
CN202520113059.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-01-17
Publication Date
2025-12-26
Estimated Expiration
2035-01-17

AI Technical Summary

Technical Problem

Existing general-purpose polishing equipment has difficulty in uniformly clamping the rotor of a hollow cup motor, resulting in deformation, and cannot efficiently adapt to the polishing needs of rotors with different inner diameters.

Method used

The clamping mechanism uses magnetorheological fluid and rubber airbags for wrapping and fixing, combined with an adjustable polishing mechanism and pressure sensor to ensure that the rotor does not deform during polishing, and the adjustable polishing components can adapt to different inner diameters.

Benefits of technology

This technology enables stable clamping and efficient polishing of the hollow cup motor rotor, preventing deformation and improving the applicability and polishing efficiency of the device.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of coreless motors, in particular to a rotor polishing device for coreless motor production, which comprises a rotor mounted on a polishing table, a clamping mechanism for clamping and fixing the rotor is arranged on the polishing table, and a polishing mechanism for polishing the inner wall of the rotor is arranged on the polishing table. According to the utility model, the rotor is completely wrapped by the rubber air bag, and then the electromagnetic plate is electrified, so that the magnetorheological fluid in the rubber air bag is converted into high-viscosity and low-fluidity Bingham fluid from low-viscosity Newtonian fluid under a low magnetic field along with the enhancement of the magnetic field, and thus the rotor is fixed in a wrapping manner; a rotating shaft is driven by an adjusting motor to rotate, and then a wheel disc at the bottom of the rotating shaft is driven to rotate, so that a sliding column is pushed to slide along an arc-shaped groove, a T-shaped sliding rod is pushed to extend outwards along a T-shaped sliding groove, and a polishing plate is pushed to move outwards; and the polishing abrasive paper is attached to the inner walls of the rotors with different inner diameters for polishing and grinding.
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Description

TECHNICAL FIELD

[0001] The utility model relates to hollow cup motor technical field especially relates to a rotor polishing device for hollow cup motor production. BACKGROUND

[0002] The hollow cup motor belongs to a direct current permanent magnet motor, and the rotor thereof is a hollow cup structure. The motor has the advantages of small size, light weight, high efficiency and fast response speed. The surface quality of the inner wall of the rotor of the hollow cup motor directly affects the operation performance of the motor.

[0003] The existing general polishing device is usually designed for workpieces with regular shapes. When applied to polishing the inner wall of the rotor of the hollow cup motor, there are many problems. First, in the clamping aspect, since the hollow cup rotor has the structural characteristics of thin wall and hollow, the general clamp is difficult to uniformly apply clamping force, which easily causes deformation of the rotor, thereby affecting the key precision indicators such as roundness and coaxiality. Second, the general mechanical polishing equipment can only polish the inner wall of the hollow cup rotor with a specific inner diameter. When facing rotors with different inner diameters, the polishing disc needs to be repeatedly replaced, which is very cumbersome and affects the polishing efficiency. SUMMARY

[0004] In view of the deficiencies of the prior art, the utility model provides a rotor polishing device for hollow cup motor production, which solves the technical problems in the prior art that the clamp is difficult to uniformly apply clamping force, easily causes deformation of the rotor, and affects the roundness and coaxiality, and achieves the purpose of more stable and gentle clamping and fixing of the rotor.

[0005] To solve the above technical problems, the utility model provides the following technical scheme: a rotor polishing device for hollow cup motor production, comprising a rotor installed on a polishing table, a clamping mechanism for clamping and fixing the rotor is arranged on the polishing table, and a polishing mechanism for polishing the inner wall of the rotor is arranged on the polishing table.

[0006] The clamping mechanism comprises a placing cylinder installed in a through hole opened on the polishing table, and an electromagnetic plate is installed at the bottom of the placing cylinder, a rubber air bag is installed on the inner wall of the placing cylinder, and a magnetorheological fluid is filled in the rubber air bag, and a liquid injection assembly for injecting the magnetorheological fluid into the rubber air bag is arranged in the polishing table.

[0007] Further improvement lies in that the liquid injection assembly comprises a liquid storage tank installed in the polishing table, a suction pump in communication with the liquid storage tank is installed on the side surface of the liquid storage tank, and a liquid injection pipe extending into the rubber air bag through the placing cylinder at the top of the outlet interface of the suction pump is installed.

[0008] Further improvement lies in that the polishing mechanism comprises a support frame mounted on the polishing table, a motorized lifting rod is mounted on the top of the support frame, a polishing motor is mounted on the free end of the motorized lifting rod penetrating through the support frame, an L-shaped support plate is mounted on the support frame, a rotating shaft is rotatably connected in a rotating hole of the L-shaped support plate, the output end of the polishing motor is connected with the rotating shaft, a door-shaped frame is mounted on the bottom of the rotating shaft, an installation plate is mounted on the bottom of the door-shaped frame, a turntable is connected with the installation plate through a connecting rod, polishing plates are annularly arranged on the outer surface of the turntable, polishing sand papers are mounted on the outer surface of the polishing plates, and an adjusting assembly for adjusting and fitting different inner diameters of the rotor is mounted on the installation plate.

[0009] Further improvement lies in that the adjusting assembly comprises a rotating shaft rotatably connected in a rotating hole of the installation plate, a wheel disc is mounted on the bottom of the rotating shaft, a plurality of sliding columns in arc shape are annularly arranged on the wheel disc and slidably connected in arc-shaped grooves of the wheel disc, T-shaped sliding rods are mounted on the bottom of the sliding columns and slidably connected in T-shaped sliding grooves of the turntable, the end of the T-shaped sliding rod is connected with the polishing plate, and an adjusting motor for driving the rotating shaft to rotate is mounted on the installation plate.

[0010] Further improvement lies in that a pressure sensor is mounted in an installation groove of the polishing plate.

[0011] Further improvement lies in that a controller is mounted on the polishing table, and the clamping mechanism and the polishing mechanism are electrically connected with the controller.

[0012] By the above technical scheme, the rotor polishing device for hollow cup motor production has at least the following beneficial effects:

[0013] 1. The rotor is fully wrapped by the rubber air bag, then the electromagnetic plate is electrified, the magnetorheological fluid in the rubber air bag is converted from the low viscosity Newton fluid under the low magnetic field into the high viscosity Bingham fluid with low fluidity, so that the rotor is fixed in a wrapping mode, and the deformation of the rotor caused by local clamping is avoided.

[0014] 2. The magnetorheological fluid in the liquid storage tank is injected into the rubber air bag through the liquid injection pipe by the suction pump, so that the rubber air bag is inflated to wrap rotors with different diameters, and the application range of the device is improved.

[0015] 3. The rotating shaft is driven to rotate by the adjusting motor, the wheel disc at the bottom of the rotating shaft is driven to rotate, the sliding column is pushed to slide along the arc-shaped groove, the T-shaped sliding rod is pushed to extend outward along the T-shaped sliding groove, the polishing plate is pushed to move outward, and the polishing sand paper is fitted to the inner wall of the rotor with different inner diameters for polishing and grinding. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and serve to explain the principles of the application, and do not limit the application.

[0017] In the drawings:

[0018] Figure 1 It is the whole structure schematic view of the utility model;

[0019] Figure 2 It is the polishing table section view internal structure schematic view of the utility model;

[0020] Figure 3 It is the clamping mechanism section view split structure schematic view of the utility model;

[0021] Figure 4 It is the polishing mechanism independent structure schematic view of the utility model;

[0022] Figure 5 It is the adjusting assembly split structure schematic view of the utility model.

[0023] In the drawings: 1, polishing table; 2, rotor;

[0024] 3, clamping mechanism; 31, place cylinder; 32, electromagnetic plate; 33, rubber air bag;

[0025] 34, liquid injection assembly; 341, liquid storage tank; 342, suction pump; 343, liquid injection pipe;

[0026] 4, polishing mechanism; 41, support frame; 42, electric lifting rod; 43, polishing motor; 44, L-shaped support plate; 45, rotating shaft; 46, door-shaped frame; 47, mounting plate; 48, rotating disc; 49, polishing plate; 410, polishing sandpaper;

[0027] 411, adjusting assembly; 4111, rotating shaft; 4112, wheel disc; 4113, slide column; 4114, T-shaped slide rod; 4115, adjusting motor;

[0028] 412, pressure sensor; 5, controller. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0030] Embodiment 1

[0031] In view of the problem that the existing clamp in the prior art is difficult to uniformly apply clamping force, and is prone to cause rotor deformation, affecting the roundness and coaxiality thereof, the embodiment provides a rotor polishing device for hollow cup motor production Figures 1-5 , the embodiment provides a rotor polishing device for hollow cup motor production, which can more stably and gently clamp and fix the rotor. The rotor polishing device for hollow cup motor production comprises a rotor 2 installed on a polishing table 1, the polishing table 1 is provided with a clamping mechanism 3 for clamping and fixing the rotor 2, and the polishing table 1 is provided with a polishing mechanism 4 for polishing the inner wall of the rotor 2. The clamping mechanism 3 is used to wrap and fix the hollow cup rotor of different sizes, so as to avoid the deformation of the rotor caused by local clamping. Then, the polishing mechanism 4 is started to polish the inner wall of the hollow cup rotor of different sizes after adjusting and fitting, thereby improving the application range of the device.

[0032] Since the clamp in the prior art is difficult to uniformly apply clamping force, and is prone to cause rotor deformation, affecting the roundness and coaxiality thereof, the device is provided with a clamping mechanism 3. The clamping mechanism 3 comprises a placing cylinder 31 installed in a through hole formed in the polishing table 1, and an electromagnetic plate 32 installed at the bottom of the placing cylinder 31. A rubber air bag 33 is installed on the inner wall of the placing cylinder 31, and the rubber air bag 33 is filled with magnetorheological fluid. A liquid injection assembly 34 for injecting magnetorheological fluid into the rubber air bag 33 is arranged in the polishing table 1. The rotor 2 is placed in the rubber air bag 33 in the placing cylinder 31. The rotor 2 is fully wrapped by the rubber air bag 33. Then, the electromagnetic plate 32 is powered on, so that the magnetorheological fluid in the rubber air bag 33 is converted from a low-viscosity Newtonian fluid under a low magnetic field into a high-viscosity Bingham fluid with low fluidity, thereby wrapping and fixing the rotor 2, and avoiding the deformation of the rotor caused by local clamping.

[0033] Since different diameters of the rotor 2 may be encountered during polishing of the rotor 2, the device is also provided with a liquid injection assembly 34. The liquid injection assembly 34 comprises a liquid storage tank 341 installed in the polishing table 1, and a suction pump 342 communicated with the liquid storage tank 341 is installed on the side surface of the liquid storage tank 341. A liquid injection pipe 343 extending into the rubber air bag 33 through the top of the placing cylinder 31 is installed on the outlet of the suction pump 342. When the rotor 2 with a small diameter is placed in the placing cylinder 31, the suction pump 342 is started to inject the magnetorheological fluid in the liquid storage tank 341 into the rubber air bag 33 through the liquid injection pipe 343, so that the rubber air bag 33 is inflated to wrap the rotor 2 with different diameters. Then, the electromagnetic plate 32 is powered on to fix the rotor 2.

[0034] The polishing mechanism 4 comprises a support frame 41 mounted on the polishing table 1, and a motorized lifting rod 42 is mounted on the top of the support frame 41, and a polishing motor 43 is mounted on the free end of the motorized lifting rod 42 penetrating through the support frame 41, an L-shaped support plate 44 is mounted on the support frame 41, and a rotating shaft 45 is rotatably connected in the rotating hole formed in the L-shaped support plate 44, and the output end of the polishing motor 43 is connected with the rotating shaft 45, a door-shaped frame 46 is mounted on the bottom of the rotating shaft 45, and an installation plate 47 is mounted on the bottom of the door-shaped frame 46, and a turntable 48 is connected through a connecting rod at the bottom of the installation plate 47, and a polishing plate 49 is annularly arranged on the outer surface of the turntable 48, and polishing sandpaper 410 is mounted on the outer surface of the polishing plate 49, and an adjusting assembly 411 for adjusting and fitting different inner diameters of the rotor is mounted on the installation plate 47, the motorized lifting rod 42 is started to push the polishing plate 49 to move downward to the inner wall bottom of the rotor 2, then the polishing motor 43 is started to drive the rotating shaft 45 to rotate, thereby driving the polishing plate 49 on the turntable 48 at the bottom of the door-shaped frame 46 to rotate, and the polishing sandpaper 410 attached to the polishing plate 49 polishes and grinds the inner wall of the rotor 2.

[0035] A controller 5 is mounted on the polishing table 1, and the clamping mechanism 3 and the polishing mechanism 4 are electrically connected to the controller 5, and the normal operation of the device is controlled through the controller 5.

[0036] Example 2

[0037] Based on example 1, as shown in Figures 1-5 Because the existing polishing equipment can only polish the inner wall of the hollow cup rotor with a specific inner diameter, and the polishing disc needs to be replaced repeatedly when facing rotors with different inner diameters, the operation is very cumbersome, therefore the device is also provided with an adjusting assembly 411, the adjusting assembly 411 comprises a rotating shaft 4111 rotatably connected in the rotating hole formed in the installation plate 47, and a wheel disc 4112 is mounted at the bottom of the rotating shaft 4111, a plurality of sliding columns 4113 are annularly arranged on the wheel disc 4112 and are slidably connected in the arc-shaped slots formed in the wheel disc 4112, a T-shaped sliding rod 4114 is mounted at the bottom of the sliding column 4113 and is slidably connected in the T-shaped sliding groove formed in the turntable 48, and the end of the T-shaped sliding rod 4114 is connected with the polishing plate 49, and an adjusting motor 4115 is mounted on the installation plate 47 to drive the rotating shaft 4111 to rotate, the adjusting motor 4115 is started to drive the rotating shaft 4111 to rotate in the rotating hole formed in the installation plate 47, thereby driving the wheel disc 4112 at the bottom of the rotating shaft 4111 to rotate, so as to push the sliding column 4113 to slide along the arc-shaped slots formed in the wheel disc 4112 and push the T-shaped sliding rod 4114 to extend outward along the T-shaped sliding groove formed in the turntable 48, thereby pushing the polishing plate 49 to move outward, so that the polishing sandpaper 410 is fitted to the inner wall of the rotor 2 with different inner diameters for polishing and grinding, and the application range of the device is improved.

[0038] Since the inner wall of the rotor 2 is thin, slight overloading can cause the rotor 2 to deform, therefore the device is provided with a pressure sensor 412 in the mounting groove on the polishing plate 49, when the polishing plate 49 is pushed out, when the polishing sand paper 410 is attached to the inner wall of the rotor 2, the force generated by the contact triggers the pressure sensor 412 installed on the polishing plate 49, and the pressure sensor 412 sends an electrical signal to the controller 5, so as to stop the operation of the adjusting motor 4115 through the controller 5, thereby avoiding over-extrusion to cause the rotor 2 to deform.

[0039] It should be noted that in this document, the terms "comprising", "including", or any other variant thereof are intended to cover non-exclusive inclusions, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or inherent to such a process, method, article or device.

[0040] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A rotor polishing device for the production of a hollow cup motor, comprising a rotor (2) mounted on a polishing table (1), characterized in that: The polishing table (1) is provided with a clamping mechanism (3) for clamping and fixing the rotor (2), and the polishing table (1) is provided with a polishing mechanism (4) for polishing the inner wall of the rotor (2). The clamping mechanism (3) comprises a placing cylinder (31) installed in the through hole of the polishing table (1), and the bottom of the placing cylinder (31) is provided with an electromagnetic plate (32), the inner wall of the placing cylinder (31) is provided with a rubber air bag (33), and the inside of the rubber air bag (33) is filled with magnetorheological fluid, and the inside of the polishing table (1) is provided with a liquid injection assembly (34) for injecting magnetorheological fluid into the rubber air bag (33).

2. The rotor polishing device for a hollow cup motor according to claim 1, characterized in that: The liquid injection assembly (34) comprises a liquid storage tank (341) installed in the polishing table (1), and the side of the liquid storage tank (341) is provided with a suction pump (342) communicated therewith, and the outlet of the suction pump (342) is provided with a liquid injection pipe (343) extending into the rubber air bag (33) through the top of the placing cylinder (31).

3. The rotor polishing device for a hollow cup motor according to claim 1, characterized in that: The polishing mechanism (4) comprises a support frame (41) installed on the polishing table (1), and the top of the support frame (41) is provided with an electric lifting rod (42), and the free end of the electric lifting rod (42) is provided with a polishing motor (43) extending through the support frame (41), the support frame (41) is provided with an L-shaped support plate (44), the L-shaped support plate (44) is provided with a rotating shaft (45) rotatably connected in the rotating hole, and the output end of the polishing motor (43) is connected with the rotating shaft (45), the bottom of the rotating shaft (45) is provided with a door-shaped frame (46), and the bottom of the door-shaped frame (46) is provided with a mounting plate (47), the bottom of the mounting plate (47) is connected with a rotating disc (48) through a connecting rod, and the outer surface of the rotating disc (48) is provided with a polishing plate (49) in an annular array, and the outer surface of the polishing plate (49) is provided with a polishing sandpaper (410), and the mounting plate (47) is provided with an adjusting assembly (411) for adjusting and fitting different inner diameters of the rotor.

4. A rotor polishing device for a hollow cup motor production according to claim 3, characterized in that: The adjusting assembly (411) comprises a rotating shaft (4111) rotatably connected in the rotating hole of the mounting plate (47), and the bottom of the rotating shaft (4111) is provided with a wheel disc (4112), a plurality of sliding columns (4113) are arranged in an annular array on the wheel disc (4112) and are slidably connected in the arc-shaped slots of the wheel disc (4112), the bottom of the sliding column (4113) is provided with a T-shaped sliding rod (4114) slidably connected in the T-shaped sliding groove of the rotating disc (48), and the end of the T-shaped sliding rod (4114) is connected with the polishing plate (49), and the mounting plate (47) is provided with an adjusting motor (4115) for driving the rotating shaft (4111) to rotate.

5. A rotor polishing device for a hollow cup motor production according to claim 3, characterized in that: A pressure sensor (412) is installed in the mounting groove of the polishing plate (49).

6. The rotor polishing device for a hollow cup motor according to claim 1, characterized in that: The polishing table (1) is provided with a controller (5), and the clamping mechanism (3) and the polishing mechanism (4) are electrically connected to the controller (5).