Outer rotor motor for grinding and polishing device

Abstract

The utility model discloses an external rotor motor for a grinding and polishing device, which has larger torque and is suitable for a large-load grinding and polishing scene under the same boundary dimension, and adopts the technical scheme that the external rotor motor for the grinding and polishing device comprises a base, a stator, a rotor and a hollow shaft, the stator is positioned in an inner ring of the rotor, and the hollow shaft is positioned in an outer ring of the rotor; the stator is fixed on the base, the base is provided with a hollow part which penetrates through the base in the axial direction of the stator, the hollow part is located in an inner ring of the stator, the hollow shaft penetrates through the hollow part and is rotationally connected with the base, and the rotor is fixedly connected with the hollow shaft.

Description

TECHNICAL FIELD

[0001] The utility model belongs to motor technical field, more specifically, relate to a kind of outer rotor motor for grinding and polishing device. BACKGROUND

[0002] At present, grinding and polishing machine is basically belt drive device, overall bulky, inconvenient to install.

[0003] For this situation, patent CN202221138064.4 discloses a direct drive motor applied to polishing machine, polishing machine and split type direct drive motor, wherein the direct drive motor applied to polishing machine includes motor base, adapter shaft, main shaft, rotor and stator, the motor base is fixed to the inner wall of the shell of polishing machine, and is rotatably connected with the one end of the rotating shaft of polishing machine extending into the shell;The adapter shaft is spaced apart from the motor base, the adapter shaft is provided with a first hollow groove, and the rotating shaft of the polishing machine is connected in the first hollow groove;The main shaft is spaced apart from the motor base, the main shaft is provided with a second hollow groove, and the adapter shaft is arranged in the second hollow groove;The rotor is sleeved on the outer wall of the main shaft and is spaced apart from the motor base;The stator is connected with the motor base and is spaced apart and oppositely arranged with the rotor.

[0004] The direct drive motor utilizes the cooperation of adapter shaft and main shaft to drive connect the rotor and the rotating shaft of polishing machine, which has complex structure and is inconvenient to maintain, and the structure is inner rotor, so the torque is small, while in grinding and polishing scene, the motor needs to have larger torque, and if the above direct drive motor needs to be applied to large load scene of grinding and polishing machine, the volume of motor needs to be increased, which also brings inconvenience to installation. UTILITY MODEL CONTENTS

[0005] The utility model mainly aims at providing an outer rotor motor for grinding and polishing device, which has larger torque under the same outer shape size and is suitable for large load grinding and polishing scene.

[0006] According to the first aspect of the utility model, an outer rotor motor for grinding and polishing device is provided, which comprises a base, a stator, a rotor and a hollow shaft, the stator is located in the inner ring of the rotor, the stator is fixed on the base, the base is provided with a hollow part penetrating the base along the axial direction of the stator, the hollow part is located in the inner ring of the stator, the hollow shaft is arranged in the hollow part and rotatably connected with the base, and the rotor is fixedly connected with the hollow shaft.

[0007] In the above-mentioned outer rotor motor for grinding and polishing device, the rotor is provided with a disc body at one end along its axial direction, and the disc body is connected with the rotor and the hollow shaft.

[0008] In the above-mentioned outer rotor motor for grinding and polishing device, the disc body and the rotor are of integrated structure.

[0009] In the outer rotor motor for the grinding and polishing device, the hollow part is provided with a bearing, and the hollow shaft is rotationally connected with the bearing.

[0010] In the outer rotor motor for the grinding and polishing device, the outer wall of the hollow shaft is provided with an annular protrusion, the annular protrusion is located on the side of the disc body away from the stator, and the disc body is fixedly connected with the annular protrusion through screws.

[0011] In the outer rotor motor for the grinding and polishing device, a gap is left between the end of the rotor away from the disc body and the base, the base is provided with an annular blocking part, the annular blocking part is sleeved on the outside of the rotor, and the annular blocking part is used for blocking the gap.

[0012] In the outer rotor motor for the grinding and polishing device, the outer wall of the hollow shaft is provided with an annular protrusion, the annular protrusion is located between the bearing and the disc body, and the disc body is fixedly connected with the annular protrusion through screws.

[0013] In the outer rotor motor for the grinding and polishing device, an annular groove is arranged between the disc body and the hollow shaft, the end of the annular groove away from the bearing is an open end, a flange is sleeved on the hollow shaft, the flange is provided with an annular stepped part matched with the annular groove, and an expansion coupling sleeve is arranged in the annular groove.

[0014] The flange and the disc body are fixedly connected through screws, so that the annular stepped part is inserted into the annular groove to press the expansion coupling sleeve.

[0015] In the outer rotor motor for the grinding and polishing device, the outer wall of the hollow shaft is provided with an annular protrusion, the annular protrusion is located between the bearing and the disc body.

[0016] In the outer rotor motor for the grinding and polishing device, the inner wall of the hollow shaft is provided with a key groove, and the two ends of the key groove along the axial direction of the hollow shaft are open ends.

[0017] The above technical scheme in the utility model has at least one of the following advantages or beneficial effects:

[0018] In the utility model, the stator is located in the inner ring of the rotor, forming an outer rotor motor structure, the rotor is connected with the hollow shaft, so as to drive the hollow shaft to rotate, and the hollow shaft can be used for transmission connection with the main shaft of the grinding and polishing device, so as to drive the main shaft of the grinding and polishing device to rotate; under the same external size, the torque of the outer rotor motor is larger, and it is more suitable for the grinding and polishing scene with large load, and the rotor is located in the outside, so that maintenance is easier. BRIEF DESCRIPTION OF DRAWINGS

[0019] The utility model will be further explained in combination with the drawings and examples.

[0020] Figure 1 is a structural schematic view of the embodiment 1 of the utility model, and

[0021] Figure 2 is a structural sectional view of the embodiment 1 of the utility model, and

[0022] Figure 3 is a structural schematic view of the embodiment 2 of the utility model, and

[0023] Figure 4 is a structural sectional view of the embodiment 2 of the utility model, and

[0024] Figure 5 is a structural schematic view of the embodiment 3 of the utility model, and

[0025] Figure 6 is a structural sectional view of the embodiment 3 of the utility model, and

[0026] Figure 7 is a structural schematic view of the embodiment 4 of the utility model, and

[0027] Figure 8 is a structural sectional view of the embodiment 4 of the utility model, and

[0028] Figure 9 is a structural sectional view of the embodiment 4 of the utility model, Figure 8 is a local enlarged view of A of the utility model.

[0029] In the drawings, the reference signs of each drawing are:

[0030] 1, base; 11, first annular boss; 12, second annular boss; 2, stator; 3, rotor; 4, hollow shaft; 41, keyway; 42, annular protrusion; 5, bearing; 6, disc body; 61, annular groove; 7, annular stop; 71, ring piece; 8, flange; 81, annular step portion; 9, expansion coupling sleeve. DETAILED DESCRIPTION

[0031] The embodiments of the utility model are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model.

[0032] The disclosure below provides many different embodiments or examples to realize different schemes of the utility model.

[0033] Embodiment 1

[0034] Referring to Figures 1-2As shown, an outer rotor motor for polishing device, comprising a base 1, a stator 2, a rotor 3 and a hollow shaft 4, the stator 2 is located in the inner ring of the rotor 3, the stator 2 is fixed on the base 1, forming an outer rotor motor structure, the base 1 is provided with a hollow part penetrating the base 1 along the axial direction of the stator 2, the hollow part is located in the inner ring of the stator 2, the hollow shaft 4 is arranged in the hollow part and is rotatably connected with the base 1, the rotor 3 is fixedly connected with the hollow shaft 4, the hollow shaft 4 supports the rotation of the rotor 3, while the rotor 3 drives the hollow shaft 4 to rotate, the hollow shaft 4 can be used for driving connection with the main shaft of the polishing device to drive the main shaft of the polishing device to rotate; under the same outer shape size, the torque of the outer rotor motor is larger, which is more suitable for large load polishing scene, and the rotor 3 is located outside, which is easier to maintain.

[0035] In this embodiment, a bearing 5 is arranged in the hollow part, and the hollow shaft 4 is rotatably connected with the bearing 5, so that the hollow shaft 4 can rotate; one bearing 5, two bearings 5 or more than two bearings 5 can be arranged in the hollow part, and the more bearings 5, the more suitable for large load friction scene.

[0036] Specifically, the rotor 3 is provided with a disc body 6 at one end along the axial direction thereof, the disc body 6 connects the rotor 3 and the hollow shaft 4, and the disc body 6, the rotor 3 and the hollow shaft 4 constitute a shell covering the stator 2, having a certain protection effect.

[0037] In this embodiment, the disc body 6 and the rotor 3 are of an integral structure, which is convenient to install and has better strength.

[0038] In some other embodiments, the disc body and the rotor 3 can be connected by bolts.

[0039] In this embodiment, the outer wall of the hollow shaft 4 is provided with an annular protrusion 42, the annular protrusion 42 is located on the side of the disc body 6 away from the stator 2, and the disc body 6 is fixedly connected with the annular protrusion 42 by screws, which is convenient to install.

[0040] In this embodiment, the inner wall of the hollow shaft 4 is provided with a key groove 41, the two ends of the key groove 41 along the axial direction of the hollow shaft 4 are open ends, the hollow shaft 4 can be connected with the main shaft by a key, and the two ends of the key groove 41 along the axial direction of the hollow shaft 4 are open ends, which facilitates the sliding of the main shaft along the axial direction thereof.

[0041] In this embodiment, the outer rotor motor is naturally cooled, and no cooling structure can be additionally arranged in the motor, so that the structure is more compact and convenient to install.

[0042] In the embodiment, a gap is left between the end of the rotor 3 away from the disc body 6 and the base 1 to allow the rotor 3 to rotate, and the base 1 is provided with an annular blocking portion 7 which is sleeved outside the rotor 3, the inner diameter of the annular blocking portion 7 is greater than the outer diameter of the rotor 3, and the annular blocking portion 6 is used to block the gap to avoid foreign matter from entering the gap and affecting the rotation of the rotor 3;

[0043] Specifically, the base 1 is provided with a first annular boss 11, the first annular boss 11 is provided with a second annular boss 12, the first annular boss 11 and the second annular boss 12 are concentrically arranged, and the second annular boss 12 is used to position the position of the stator 2, and the outer peripheral wall of the second annular boss 12 cooperates with the inner peripheral wall of the stator 2 to achieve positioning.

[0044] The annular blocking portion 7 is arranged on a ring piece 71, and the ring piece 71 is sleeved on the first annular boss 11 to position the position of the ring piece 71 and further determine the position of the annular blocking portion 7.

[0045] Embodiment 2

[0046] Referring to Figures 3-4 An outer rotor motor for a polishing device is shown in the figure, which comprises a base 1, a stator 2, a rotor 3 and a hollow shaft 4, the stator 2 is located in the inner circle of the rotor 3, the stator 2 is fixed on the base 1 to form an outer rotor motor structure, the base 1 is provided with a hollow portion which penetrates the base 1 along the axial direction of the stator 2, the hollow portion is located in the inner circle of the stator 2, the hollow shaft 4 is arranged in the hollow portion and is rotationally connected with the base 1, the rotor 3 is fixedly connected with the hollow shaft 4, the hollow shaft 4 supports the rotation of the rotor 3, and the rotor 3 drives the hollow shaft 4 to rotate, and the hollow shaft 4 can be used to be drivingly connected with the main shaft of the polishing device to drive the main shaft of the polishing device to rotate;

[0047] A bearing 5 is arranged in the hollow portion, and the hollow shaft 4 is rotationally connected with the bearing 5 so that the hollow shaft 4 can rotate; the rotor 3 is provided with a disc body 6 at one end along the axial direction thereof, and the disc body 6 connects the rotor 3 and the hollow shaft 4; the disc body 6 and the rotor 3 are of an integrated structure;

[0048] An annular protrusion 42 is arranged on the outer wall of the hollow shaft 4, the annular protrusion 42 is located between the bearing 5 and the disc body 6, and the disc body 6 is fixedly connected with the annular protrusion 42 through a screw;

[0049] The annular protrusion 42 can limit the position of the hollow shaft 4 to avoid the hollow shaft 4 from moving along the axial direction thereof, and the disc body 6 and the annular protrusion 42 are connected through a screw, so that the disc body 6 and the hollow shaft 4 are fixed together.

[0050] Embodiment 3

[0051] Referring to Figures 5-6As shown in the figure, an outer rotor motor for a grinding and polishing device comprises a base 1, a stator 2, a rotor 3 and a hollow shaft 4. The stator 2 is located in the inner circle of the rotor 3, and the stator 2 is fixed on the base 1 to form an outer rotor motor structure. The base 1 is provided with a hollow portion penetrating the base 1 along the axial direction of the stator 2, and the hollow portion is located in the inner circle of the stator 2. The hollow shaft 4 is arranged in the hollow portion and is rotationally connected to the base 1. The rotor 3 is fixedly connected to the hollow shaft 4. The hollow shaft 4 supports the rotation of the rotor 3, and the rotor 3 drives the hollow shaft 4 to rotate. The hollow shaft 4 can be used for driving connection with the main shaft of the grinding and polishing device to drive the main shaft of the grinding and polishing device to rotate.

[0052] A bearing 5 is arranged in the hollow portion, and the hollow shaft 4 is rotationally connected to the bearing 5, so that the hollow shaft 4 can rotate. The rotor 3 is provided with a disc body 6 at one end along the axial direction thereof. The disc body 6 connects the rotor 3 and the hollow shaft 4. The disc body 6 and the rotor 3 are of an integral structure.

[0053] An annular groove 61 is arranged between the disc body 6 and the hollow shaft 4. The end of the annular groove 61 away from the bearing 5 is an open end. A flange 8 is arranged on the hollow shaft 4. The flange 8 is provided with an annular stepped portion 81 matched with the annular groove 61. An expansion coupling sleeve 9 is arranged in the annular groove 61.

[0054] The flange 8 and the disc body 6 are fixedly connected by screws. The annular stepped portion 81 is inserted into the annular groove 61 to press the expansion coupling sleeve 9. The expansion coupling sleeve 9 abuts against the inner wall of the annular groove 61 and the outer wall of the hollow shaft 4, thereby fixing the hollow shaft 4.

[0055] Embodiment 4

[0056] Referring to Figures 7-9 As shown in the figure, an outer rotor motor for a grinding and polishing device comprises a base 1, a stator 2, a rotor 3 and a hollow shaft 4. The stator 2 is located in the inner circle of the rotor 3, and the stator 2 is fixed on the base 1 to form an outer rotor motor structure. The base 1 is provided with a hollow portion penetrating the base 1 along the axial direction of the stator 2, and the hollow portion is located in the inner circle of the stator 2. The hollow shaft 4 is arranged in the hollow portion and is rotationally connected to the base 1. The rotor 3 is fixedly connected to the hollow shaft 4. The hollow shaft 4 supports the rotation of the rotor 3, and the rotor 3 drives the hollow shaft 4 to rotate. The hollow shaft 4 can be used for driving connection with the main shaft of the grinding and polishing device to drive the main shaft of the grinding and polishing device to rotate.

[0057] A bearing 5 is arranged in the hollow portion, and the hollow shaft 4 is rotationally connected to the bearing 5, so that the hollow shaft 4 can rotate. The rotor 3 is provided with a disc body 6 at one end along the axial direction thereof. The disc body 6 connects the rotor 3 and the hollow shaft 4. The disc body 6 and the rotor 3 are of an integral structure.

[0058] The annular groove 61 is open at an end away from the bearing 5, and the hollow shaft 4 is sleeved with a flange 8, the flange 8 is provided with an annular stepped portion 81 matched with the annular groove 61, and the annular groove 61 is provided with an expansion coupling sleeve 9;

[0059] The flange 8 and the disc body 6 are fixedly connected by screws, so that the annular stepped portion 81 is inserted into the annular groove 61 to press the expansion coupling sleeve 9, and the expansion coupling sleeve 9 is tightly contacted with the inner wall of the annular groove 61 and the outer wall of the hollow shaft 4, thereby fixing the hollow shaft 4;

[0060] The outer wall of the hollow shaft 4 is provided with an annular protrusion 42 between the bearing 5 and the disc body 6, which can position the hollow shaft 4 and prevent the hollow shaft 4 from moving along the axial direction.

[0061] Although the embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. An external rotor motor for a grinding and polishing device, characterized in that, The utility model provides a motor, including base, stator, rotor and hollow shaft, the stator is located in the inner ring of rotor, the stator is fixed on the base, be equipped with hollow portion along the axial direction of stator and pass through the base, the hollow portion is located in the inner ring of stator, the hollow shaft is passed in the hollow portion and is rotatably connected with the base, the rotor is fixedly connected with the hollow shaft.

2. The outer rotor motor for a polishing apparatus according to claim 1, characterized by The rotor is provided with a disc body at one end of its axial direction, and the disc body is connected with the rotor and the hollow shaft.

3. The outer rotor motor for a polishing apparatus according to claim 2, characterized by The disc body and the rotor are in an integral structure.

4. The outer rotor motor for the polishing apparatus according to claim 2, characterized by The hollow portion is provided with a bearing, and the hollow shaft is rotatably connected with the bearing.

5. The outer rotor motor for the polishing apparatus according to claim 2, characterized by An annular protrusion is arranged on the outer wall of the hollow shaft, and the annular protrusion is located on the side of the disc body away from the stator.

6. The outer rotor motor for the polishing apparatus according to claim 2, characterized by The disc body is fixedly connected with the annular protrusion through screws.

7. The outer rotor motor for the polishing apparatus according to claim 4, characterized by A gap is left between the end of the rotor away from the disc body and the base, and the base is provided with an annular stop portion, which is sleeved on the outside of the rotor and is used for blocking the gap.

8. The outer rotor motor for the polishing apparatus according to claim 4, characterized by An annular protrusion is arranged on the outer wall of the hollow shaft, and the annular protrusion is located between the bearing and the disc body. The disc body is fixedly connected with the annular protrusion through screws.

9. The outer rotor motor for a polishing apparatus according to claim 8, characterized by An annular groove is arranged between the disc body and the hollow shaft, and the end of the annular groove away from the bearing is an open end.

10. The outer rotor motor for a polishing apparatus according to claim 1, characterized by A flange is sleeved on the hollow shaft, and the flange is provided with an annular step portion matched with the annular groove. The flange is fixedly connected with the disc body through screws, so that the annular step portion is inserted into the annular groove to compress the expansion coupling sleeve. An annular protrusion is arranged on the outer wall of the hollow shaft, and the annular protrusion is located between the bearing and the disc body. The inner wall of the hollow shaft is provided with a key groove, and the two ends of the key groove along the axial direction of the hollow shaft are open ends.

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