Rotor structure of inner rotor brushless motor

Abstract

The utility model discloses a rotor structure of an inner rotor brushless motor, which comprises a shaft, one side of the outer surface of the shaft is fixedly connected with a connecting sleeve, the outer surface of the connecting sleeve is fixedly connected with a first clamping strip, and the outer surface of the first clamping strip is clamped with a rotor. According to the rotor structure of the inner rotor brushless motor, through the arrangement of the clamping strips, the rotor, the first clamping grooves, the second clamping grooves and the second clamping strips, the rotor sleeves the outer surface of the connecting sleeve, the first clamping strips and the first clamping grooves are clamped and matched with each other, so that the rotor and the shaft rotate integrally, and a plurality of windings are clamped in the second clamping grooves; the top of the winding is limited by the iron core through the second clamping strip, so that the positions among structural elements are not easy to deviate and shake, the deflection resistance of the shaft is improved, the consistency of the rotor is good, the rotor can be quickly disassembled and assembled, great convenience is provided for maintenance of workers, the assembly difficulty and the cost of production parts are reduced, and the use efficiency of the brushless motor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rotor structures, and particularly relates to a rotor structure of an inner-rotor brushless motor. Background Technique

[0002] Brushless motors have the advantages of simple structure, no slip rings and brushes, etc., and show good application prospects in the fields of AC speed regulation and variable-speed constant-frequency constant-voltage power generation. The rotor winding structure is one of the key factors determining the performance of brushless motors. At present, the rotor structures of brushless motors often adopt three structures: special cage type, reluctance type and wound type. No matter what kind of rotor structure form, it must meet the requirements of simultaneously coupling the stator power winding and the control winding.

[0003] After retrieval, Chinese Patent Publication (Announcement) No. CN202322954203.1 discloses a brushless motor rotor structure and a brushless motor, including a motor, a rotor is arranged inside the motor, a rotating shaft is fixedly connected inside the rotor, a circular plate is fixedly connected to one end of the rotating shaft, a housing is fixedly connected to one side of the motor, a sleeve is fixedly connected to the side of the housing close to the rotating shaft, a plug board is inserted inside the sleeve, and a connecting board is fixedly connected to the top of the plug board. The advantages of the utility model are as follows: when the rotating shaft rotates normally, the circular plate at one end of the rotating shaft will not contact the plug board. When the rotor rotates unbalancedly, the circular plate at the end of the rotating shaft will contact the plug board and push it to the outside, and the connecting board lapped on the sleeve will be separated from it. The state of the connecting board can be observed from the outside, so as to quickly understand whether the rotation state of the rotor is normal. The four bell mouths respectively correspond to the four surfaces of the motor, and the wind blown out from the four bell mouths can quickly take away the heat dissipated from the surface of the motor.

[0004] Although the above patent can quickly understand the rotation state of the rotor, the rotor and the rotating shaft are fixedly connected. When the staff repairs the rotor, the whole part needs to be replaced, which not only affects the repair efficiency of the brushless motor, but also increases the repair cost. Therefore, it is necessary to design a rotor structure of an inner-rotor brushless motor to solve the above problems. Summary of the Utility Model

[0005] The main purpose of the utility model is to provide a rotor structure of an inner-rotor brushless motor, which can effectively solve the problems in the background technique.

[0006] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A rotor structure of an inner-rotor brushless motor, comprising a shaft. One side of the outer surface of the shaft is fixedly connected with a connecting sleeve. The outer surface of the connecting sleeve is fixedly connected with a first clamping strip, and the outer surface of the first clamping strip is clamped with a rotor. One side of the inner side surface of the rotor close to the first clamping strip is provided with a first clamping groove. The outer surface of the rotor is provided with a second clamping groove. One side of the inner side surface of the second clamping groove is clamped with a winding, and the top of the inner side surface of the second clamping groove is clamped with a second clamping strip. The outer surface of the second clamping strip is fixedly connected with an iron core.

[0008] In order to achieve the effect of strengthening the structural stability of the iron core, as a rotor structure of an inner-rotor brushless motor of the present utility model, both ends of the iron core are fixedly connected with end rings, and the outer surface of the iron core is fixedly connected with conducting bars.

[0009] In order to achieve the effect of reducing noise, as a rotor structure of an inner-rotor brushless motor of the present utility model, a first gasket is sleeved on one side of the outer surface of the shaft close to the rotor, and a second gasket is sleeved on the other side of the outer surface of the shaft close to the rotor.

[0010] In order to achieve the effect of facilitating the support of the shaft, as a rotor structure of an inner-rotor brushless motor of the present utility model, a limiting groove is opened at one end of the shaft. The outer surface of the limiting groove is clamped with a first connecting ring. The outer surface of the first connecting ring is rollingly connected with a first ball, and the outer surface of the first ball is rollingly connected with a first shaft sleeve.

[0011] In order to achieve the effect of facilitating the fixing of the first shaft sleeve, as a rotor structure of an inner-rotor brushless motor of the present utility model, the outer surface of the first shaft sleeve is fixedly connected with a mounting plate, and mounting holes are opened on the outer surface of the mounting plate.

[0012] In order to achieve the effect of strengthening the rotational stability of the shaft, as a rotor structure of an inner-rotor brushless motor of the present utility model, a second connecting ring is rotatably connected to one side of the outer surface of the shaft close to the first gasket. The outer surface of the second connecting ring is rollingly connected with a second ball, and the outer surface of the second ball is rollingly connected with a second shaft sleeve.

[0013] In order to achieve the effect of facilitating the support of the first gasket, as a rotor structure of an inner-rotor brushless motor of the present utility model, a limiting plate is fixedly connected to the outer surface of the second shaft sleeve.

[0014] Compared with the prior art, the present utility model has the following beneficial effects:

[0015] 1. In the present utility model, through the arrangement of the first clamping strip, rotor, first clamping groove, second clamping groove and second clamping strip, the rotor is sleeved on the outer surface of the connecting sleeve. The first clamping strip and the first clamping groove are mutually clamped and fitted, so that the rotor and the shaft rotate integrally. A plurality of windings are clamped inside the second clamping groove, and the iron core limits the top of the winding through the second clamping strip, making the positions between the structural elements not easy to shift or shake, improving the anti-deflection of the shaft, having good consistency of the rotor, and being capable of quick disassembly and assembly, providing great convenience for the maintenance of workers, reducing the assembly difficulty and the production part cost, and improving the use efficiency of the brushless motor.

[0016] 2. In the present utility model, through the arrangement of the end ring, conducting bar, first gasket, second gasket and second shaft sleeve, the end ring is fixed at both ends of the iron core to strengthen the structural strength. A plurality of conducting bars are uniformly fixed on the outer surface of the iron core in a circumferential array, and the conducting bars are insulated from each other, improving the magnetic field modulation effect of the motor. The first gasket and the second gasket provide a buffering space when the structure limits the rotor, reducing the noise generated by the shaft during the operation of the motor, having a good sound insulation effect. The second shaft sleeve is connected to the shaft through the second ball and the second connecting ring, making the shaft not easy to shift and shake when rotating, avoiding the situation of local deformation of the shaft, and maintaining the stable operation of the shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the front view structural schematic diagram of the embodiment of the present utility model;

[0018] Figure 2 is the cross-sectional plane structural schematic diagram of the embodiment of the present utility model;

[0019] Figure 3 is the shaft structural schematic diagram of the embodiment of the present utility model;

[0020] Figure 4 is the rotor structural schematic diagram of the embodiment of the present utility model;

[0021] Figure 5 is the shaft sleeve structural schematic diagram of the embodiment of the present utility model.

[0022] In the figure: 1, shaft; 2, connecting sleeve; 3, first clamping strip; 4, rotor; 5, first clamping groove; 6, second clamping groove; 7, winding; 8, second clamping strip; 9, iron core; 10, end ring; 11, conducting bar; 12, first gasket; 13, second gasket; 14, limiting groove; 15, first connecting ring; 16, first ball; 17, first shaft sleeve; 18, mounting plate; 19, mounting hole; 20, second connecting ring; 21, second ball; 22, second shaft sleeve; 23, limiting plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the protection scope of the present utility model.

[0024] Embodiment

[0025] As Figures 1-5 shown, a rotor structure of an inner rotor brushless motor includes a shaft 1. One side of the outer surface of the shaft 1 is fixedly connected with a connecting sleeve 2. The outer surface of the connecting sleeve 2 is fixedly connected with a first clamping strip 3. The outer surface of the first clamping strip 3 is clamped with a rotor 4. A first clamping groove 5 is formed on one side of the inner surface of the rotor 4 close to the first clamping strip 3. A second clamping groove 6 is formed on the outer surface of the rotor 4. A winding 7 is clamped on one side of the inner surface of the second clamping groove 6. A second clamping strip 8 is clamped on the top of the inner surface of the second clamping groove 6. The outer surface of the second clamping strip 8 is fixedly connected with an iron core 9.

[0026] During specific use, through the settings of the first clamping strip 3, the rotor 4, the first clamping groove 5, the second clamping groove 6, the winding 7 and the second clamping strip 8, the connecting sleeve 2 is fixed on one side of the outer surface of the shaft 1 and is integrally formed with a plurality of first clamping strips 3, with high structural strength. The rotor 4 is sleeved on the outer surface of the connecting sleeve 2. The first clamping strip 3 and the first clamping groove 5 are mutually clamped and fitted, so that the rotor 4 and the shaft 1 rotate integrally. Then, a plurality of windings 7 are clamped inside the second clamping groove 6. The iron core 9 limits the top of the winding 7 through the second clamping strip 8 and installs itself at the same time, making the positions between the structural elements not easily shift or shake, improving the anti-deflection of the shaft 1, not generating cracking phenomena, having good consistency of the rotor 4, and being quickly disassembled and assembled, providing great convenience for the maintenance of workers, reducing the assembly difficulty and the production part cost, and improving the use efficiency of the brushless motor.

[0027] In this embodiment, end rings 10 are fixedly connected to both ends of the iron core 9, and guide bars 11 are fixedly connected to the outer surface of the iron core 9.

[0028] During specific use, through the settings of the end rings 10 and the guide bars 11, the end rings 10 are fixed at both ends of the iron core 9 to strengthen the structural strength. A plurality of guide bars 11 are uniformly fixed on the outer surface of the iron core 9 in a circumferential array. The plurality of guide bars 11 are insulated from each other, improving the magnetic field modulation effect of the motor.

[0029] In this embodiment, a first gasket 12 is sleeved on one side of the outer surface of the shaft 1 close to the rotor 4, and a second gasket 13 is sleeved on the other side of the outer surface of the shaft 1 close to the rotor 4.

[0030] During specific use, through the settings of the first gasket 12 and the second gasket 13, which are respectively sleeved on both sides of the rotor 4, there is a buffer space when the structure limits the position of the rotor 4. At the same time, the first gasket 12 and the second gasket 13 are made of elastic materials, reducing the noise generated by the shaft 1 during the operation of the motor and having a good sound insulation effect.

[0031] In this embodiment, a limiting groove 14 is formed at one end of the shaft 1, a first connecting ring 15 is clamped on the outer surface of the limiting groove 14, a first ball 16 is rotatably connected to the outer surface of the first connecting ring 15, and a first shaft sleeve 17 is rotatably connected to the outer surface of the first ball 16.

[0032] During specific use, through the setting of the first connecting ring 15, the first connecting ring 15 is clamped on the outer surface of the shaft 1 through the limiting groove 14, which can make the shaft 1 more firm and stable during rotation, effectively preventing the longitudinal movement of the shaft 1. At the same time, the first connecting ring 15 is rotatably connected to the inside of the first shaft sleeve 17 through a plurality of first balls 16, which can prevent the shaft 1 from moving too much, making the rotation of the shaft 1 more stable.

[0033] In this embodiment, a mounting plate 18 is fixedly connected to the outer surface of the first shaft sleeve 17, and a mounting hole 19 is formed on the outer surface of the mounting plate 18.

[0034] During specific use, through the setting of the mounting plate 18, the mounting hole 19 is used in cooperation with an external bolt, and the mounting plate 18 can be fixed inside the housing of the brushless motor.

[0035] In this embodiment, a second connecting ring 20 is rotatably connected to the outer surface of the shaft 1 near the first gasket 12, a second ball 21 is rotatably connected to the outer surface of the second connecting ring 20, and a second shaft sleeve 22 is rotatably connected to the outer surface of the second ball 21.

[0036] During specific use, through the setting of the second shaft sleeve 22, the second connecting ring 20 is rotatably connected to the outer surface of the shaft 1. At the same time, the second connecting ring 20 is rotatably connected to the inside of the second shaft sleeve 22 through a plurality of second balls 21, which can support the shaft 1, making it not easy to deviate and shake during rotation, avoiding the situation of local deformation of the shaft 1, and keeping the shaft 1 running smoothly. The second shaft sleeve 22 can be clamped at the edge of the inner side surface of the brushless motor housing.

[0037] In this embodiment, a limiting plate 23 is fixedly connected to the outer surface of the second shaft sleeve 22.

[0038] During specific use, through the setting of the limiting plate 23, the limiting plate 23 is mutually attached and pressed against the first gasket 12, avoiding the second shaft sleeve 22 from detaching from the housing of the brushless motor and playing a role of supporting and limiting.

[0039] Working principle: During use, the rotor 4 is sleeved on the outer surface of the connecting sleeve 2. The first card slot 5 and the second card slot 6 are clamped and fitted with each other. Multiple windings 7 are clamped inside the second card slot 6. The iron core 9 limits the top of the winding 7 through the second card strip 8. The end rings 10 are fixed at both ends of the iron core 9. Multiple bars 11 are insulated from each other to improve the magnetic field modulation effect of the motor. The first gasket 12 and the second gasket 13 are respectively sleeved on both sides of the rotor 4, so that when the structure limits the rotor 4, there is a buffer space, and at the same time, the noise generated by the shaft 1 during the operation of the motor is reduced. The first connecting ring 15 is clamped on the outer surface of the shaft 1 through the limiting groove 14, making the shaft 1 more firm and stable during rotation. At the same time, the first connecting ring 15 is rotatably connected inside the first bushing 17 through multiple first balls 16 to prevent the shaft 1 from moving too much, making the shaft 1 rotate more stably. The mounting holes 19 are used in cooperation with external bolts to fix the mounting plate 18 inside the housing of the brushless motor. The second bushing 22 supports the other side of the shaft 1 through the second balls 21 and the second connecting ring 20, making it not easy for the shaft 1 to deviate and shake during rotation. The limiting plate 23 is tightly attached to the first gasket 12 to prevent the second bushing 22 from detaching from the housing of the brushless motor, providing great convenience for maintenance by workers and reducing the assembly difficulty and the production part cost.

[0040] The above shows and describes 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 by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A rotor structure of an inner-rotor brushless motor, including a shaft (1), characterized in that: One side of the outer surface of the shaft (1) is fixedly connected with a connecting sleeve (2), the outer surface of the connecting sleeve (2) is fixedly connected with a first clamping strip (3), and the outer surface of the first clamping strip (3) is clamped with a rotor (4); On one side of the inner side of the rotor (4) close to the first clamping strip (3), a first clamping groove (5) is opened, on the outer surface of the rotor (4), a second clamping groove (6) is opened, on one side of the inner surface of the second clamping groove (6), a winding (7) is clamped, on the top of the inner surface of the second clamping groove (6), a second clamping strip (8) is clamped, and the outer surface of the second clamping strip (8) is fixedly connected with an iron core (9).

2. The rotor structure of a brushless inner-rotor motor according to claim 1, characterized in that: Both ends of the iron core (9) are fixedly connected with end rings (10), and the outer surface of the iron core (9) is fixedly connected with conducting bars (11).

3. The rotor structure of a brushless motor with an inner rotor according to claim 1, characterized in that: On one side of the outer surface of the shaft (1) close to the rotor (4), a first gasket (12) is sleeved, and on the other side of the outer surface of the shaft (1) close to the rotor (4), a second gasket (13) is sleeved.

4. The rotor structure of an inner-rotor brushless motor according to claim 1, characterized in that: A limiting groove (14) is opened at one end of the shaft (1), the outer surface of the limiting groove (14) is clamped with a first connecting ring (15), the outer surface of the first connecting ring (15) is in rolling connection with a first ball (16), and the outer surface of the first ball (16) is in rolling connection with a first shaft sleeve (17).

5. The rotor structure of a brushless inner-rotor motor according to claim 4, characterized in that: The outer surface of the first shaft sleeve (17) is fixedly connected with a mounting plate (18), and mounting holes (19) are opened on the outer surface of the mounting plate (18).

6. The rotor structure of a brushless inner-rotor motor according to claim 3, characterized in that: On one side of the outer surface of the shaft (1) close to the first gasket (12), a second connecting ring (20) is rotatably connected, the outer surface of the second connecting ring (20) is in rolling connection with a second ball (21), and the outer surface of the second ball (21) is in rolling connection with a second shaft sleeve (22).

7. The rotor structure of a brushless motor with an inner rotor according to claim 6, characterized in that: The outer surface of the second shaft sleeve (22) is fixedly connected with a limiting plate (23).

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