Rotor structure of variable-pitch direct-current motor

Abstract

The rotor structure comprises a driving shaft, the outer surface of the driving shaft is fixedly connected with an annular plate, the outer surface of the driving shaft is sleeved with an iron core sleeve, the outer surface of the driving shaft is sleeved with a commutator member, one end of the driving shaft is provided with a blade member, and the other end of the driving shaft is provided with a rotor. The outer surface of the iron core sleeve is connected with a plurality of iron core plates, the outer surface of each iron core plate is provided with a coil groove, and the outer surface of each coil groove is wound with a copper coil. The iron core sleeve and the commutator part can be positioned and guided during installation, locking and fixing of the iron core sleeve and the commutator part are facilitated, the locking rod and the locking nut are used for locking and fixing the iron core sleeve and the driving shaft during installation, the commutator part can be fixed through the first threaded locking ring, and the stability of the commutator part during work can be guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of pitch DC motors, specifically a rotor structure for a pitch DC motor. Background Technology

[0002] A pitch DC motor is a type of DC motor used in the pitch system of a wind turbine generator set. The DC power supply supplies power to the armature winding through brushes. The conductors on the surface of the armature, under the N and S poles, carry currents in the same direction. According to the left-hand rule, these conductors will be subjected to torque, causing the entire armature winding, i.e., the rotor, to rotate in a certain direction, thereby converting the input DC electrical energy into mechanical energy output on the rotor shaft.

[0003] The rotor of a pitch DC motor consists of components such as a drive shaft, a core, and a commutator. However, most current rotor assemblies are assembled using traditional interference fits or keyed connections. While interference fits can ensure a certain level of connection stability, disassembly often requires the application of significant external force with specialized tools. This not only easily damages the mating surfaces of the drive shaft and the core but is also extremely time-consuming and labor-intensive. Keyed connections, on the other hand, are prone to wear after prolonged use. When key replacement is needed, the process of removing the key from its embedded position within the shaft and keyway is complex, increasing the rotor's maintenance workload. Therefore, we propose a rotor structure for a pitch DC motor to address these issues. Utility Model Content

[0004] The purpose of this invention is to provide a rotor structure for a pitch DC motor to solve the problems mentioned in the background section and overcome its technical defects.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a rotor structure of a pitch DC motor, including a drive shaft, an annular plate fixedly connected to the outer surface of the drive shaft, an iron core sleeve fitted on the outer surface of the drive shaft, a commutation device fitted on the outer surface of the drive shaft, a blade piece provided at one end of the drive shaft, multiple iron core plates connected to the outer surface of the iron core sleeve, a coil groove opened on the outer surface of each iron core plate, a copper coil wound on the outer surface of each coil groove, multiple through holes opened on one side of the annular plate, and multiple locking rods connected to one side of the iron core sleeve.

[0006] As a further embodiment of this utility model: the commutator includes a commutator body, one end of which is in contact with one end of the iron core sleeve, and a plurality of commutator copper plates are connected to the outer surface of the commutator body, the number of commutator copper plates being the same as the number of coil slots, and a first threaded locking ring is provided on one side of the commutator body.

[0007] As a further embodiment of this utility model: the blade component includes a blade sleeve, the outer surface of the blade sleeve is in contact with the outer surface of one end of the drive shaft, a plurality of heat dissipation blades are connected to the outer surface of the blade sleeve, and a second threaded locking ring is threadedly connected to the outer surface of the drive shaft, one end of the second threaded locking ring is in contact with one end of the blade sleeve.

[0008] As a further improvement of this utility model: one end of each locking rod passes through the through hole and extends to one side of the through hole, and a locking nut is threaded onto the outer surface of each locking rod.

[0009] As a further embodiment of this utility model: the outer surface of the drive shaft is provided with a plurality of sliding grooves, and the inner wall of each sliding groove is slidably connected with a plurality of first limiting blocks and a plurality of second limiting blocks. The side of each first limiting block that is far apart from each other is connected to the inner ring of the iron core sleeve, and the side of each second limiting block that is far apart from each other is connected to the inner ring of the commutation device.

[0010] Compared with the prior art, the beneficial effects of this utility model include: the sliding groove set in the drive shaft, which cooperates with the first and second limiting blocks, can position and guide the iron core sleeve and commutation device during installation, and facilitate their locking and fixing. The locking rod and locking nut are used to lock and fix the iron core sleeve and drive shaft during installation. The commutation device can be fixed by the first threaded locking ring, which can ensure its stability during operation. Furthermore, compared with the traditional interference fit and key connection, this rotor structure can be more convenient to disassemble and maintain while ensuring structural stability. When disassembly is required, it is not necessary to apply a large external force with professional tools as with interference fit, which reduces damage to the mating surfaces of the components and avoids the complicated operation of replacing the key after wear in key connection. Attached Figure Description

[0011] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0012] Figure 1 The schematic diagram shows a frontal perspective three-dimensional structural diagram of the rotor structure of a pitch DC motor according to one embodiment of the present invention.

[0013] Figure 2 The schematic diagram shows a top perspective view of the rotor structure of a pitch DC motor according to one embodiment of the present invention.

[0014] Figure 3 The schematic diagram shows a side sectional view of the rotor structure of a pitch DC motor according to one embodiment of the present invention.

[0015] Figure 4 The schematic diagram shows a three-dimensional side view of the core plate in the rotor structure of a pitch DC motor according to one embodiment of the present invention.

[0016] Figure 5 The schematic diagram illustrates the rotor structure of a pitch DC motor according to one embodiment of the present invention. Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0017] The following are the labeling elements in the diagram: 1. Drive shaft; 2. Annular plate; 3. Iron core sleeve; 4. Commutating device; 401. Commutator body; 402. Commutator copper plate; 403. First threaded locking ring; 5. Blade component; 501. Blade sleeve; 502. Heat dissipation blade; 503. Second threaded locking ring; 6. Iron core plate; 7. Slide groove; 8. Copper coil; 9. Coil groove; 10. Through hole; 11. Locking rod; 12. Locking nut; 13. First limit block; 14. Second limit block. Detailed Implementation

[0018] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0019] According to one embodiment of the present invention, in conjunction with the appendix Figure 1-5 As shown.

[0020] A rotor structure for a pitch DC motor includes a drive shaft 1, an annular plate 2 fixedly connected to the outer surface of the drive shaft 1, a core sleeve 3 fitted onto the outer surface of the drive shaft 1, a commutation device 4 fitted onto the outer surface of the drive shaft 1, a blade 5 at one end of the drive shaft 1, multiple core plates 6 connected to the outer surface of the core sleeve 3, a coil slot 9 formed on the outer surface of each core plate 6, a copper coil 8 wound around the outer surface of each coil slot 9, multiple through holes 10 formed on one side of the annular plate 2, and multiple locking rods 11 connected to one side of the core sleeve 3, one end of each locking rod 11 penetrating through the through hole 10 and extending to one side of the through hole 10, and the outer surface of each locking rod 11 being threaded. The drive shaft 1 is equipped with a locking nut 12. Multiple grooves 7 are provided on the outer surface of the drive shaft 1. Multiple first limiting blocks 13 and multiple second limiting blocks 14 are slidably connected to the inner wall of each groove 7. The side of each first limiting block 13 that is far apart from each other is connected to the inner ring of the iron core sleeve 3. The side of each second limiting block 14 that is far apart from each other is connected to the inner ring of the commutator 4. Through the grooves 7 provided on the drive shaft 1 and the cooperation of the first limiting blocks 13 and the second limiting blocks 14, the iron core sleeve 3 and the commutator 4 can be positioned and guided during installation, and it is also convenient to lock and fix them. In addition, all the components in this application are made of materials that do not affect the conduction of rotor current and will not affect the normal operation of the rotor.

[0021] In this embodiment, the commutation device 4 includes a commutator body 401. One end of the commutator body 401 is in contact with one end of the iron core sleeve 3. Multiple commutator copper plates 402 are connected to the outer surface of the commutator body 401, and the number of commutator copper plates 402 is the same as the number of coil slots 9. A first threaded locking ring 403 is provided on one side of the commutator body 401. The commutation principle is that the commutator body 401 and the commutator copper plates 402 in the commutation device 4 play a key role. As the drive shaft 1 rotates, the position of the armature winding, i.e., the copper coil 8 and other components, in the magnetic field changes continuously. The commutator copper plates 402 cooperate with the brushes to change the direction of the current in the armature winding in a timely manner, ensuring that the direction of the electromagnetic torque is always consistent, so that the drive shaft 1 rotates continuously and stably.

[0022] In this embodiment, the blade component 5 includes a blade sleeve 501. The outer surface of the blade sleeve 501 is in contact with the outer surface of one end of the drive shaft 1. A plurality of heat dissipation blades 502 are connected to the outer surface of the blade sleeve 501. A second threaded locking ring 503 is threadedly connected to the outer surface of the drive shaft 1. One end of the second threaded locking ring 503 is in contact with one end of the blade sleeve 501. Heat dissipation of the blade component 5: The heat dissipation blades 502 in the blade component 5 rotate with the drive shaft 1, accelerating the flow of surrounding air. Through convection, the heat generated during the operation of the motor is dissipated into the surrounding environment, which plays a role in heat dissipation and ensures that the motor operates within a suitable temperature range.

[0023] The working principle of this utility model is as follows: First, the core plate 6 is taken out and the core sleeve 3 is slid on the surface of the drive shaft 1. During connection, the first limiting block 13 needs to slide inside the slide groove 7 to limit the connection of the core sleeve 3. Then, one end of the locking rod 11 passes through the through hole 10 and is locked and fixed by the locking nut 12. Then, the commutation device 4 and the blade piece 5 are installed on one end of the core sleeve 3 in sequence. Then the assembly of the rotor assembly is completed. When the rotor is working, the current passes through the copper coil 8 wound on the coil groove 9 of the core plate 6 and generates a magnetic field in the magnetic circuit formed by the core sleeve 3 and the core plate 6. According to the law of electromagnetic induction, a current-carrying conductor will be subjected to a force in the magnetic field. The drive shaft 1 starts to rotate under the action of electromagnetic torque, realizing the conversion of electrical energy into mechanical energy.

[0024] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0025] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A rotor structure of a variable-pitch direct current motor, characterized by, The device includes a drive shaft (1), an annular plate (2) fixedly connected to the outer surface of the drive shaft (1), an iron core sleeve (3) sleeved on the outer surface of the drive shaft (1), a commutation device (4) sleeved on the outer surface of the drive shaft (1), a blade (5) provided at one end of the drive shaft (1), multiple iron core plates (6) connected to the outer surface of the iron core sleeve (3), a coil groove (9) opened on the outer surface of each iron core plate (6), a copper coil (8) wound on the outer surface of each coil groove (9), multiple through holes (10) opened on one side of the annular plate (2), and multiple locking rods (11) connected to one side of the iron core sleeve (3).

2. The variable pitch DC motor rotor structure of claim 1, wherein, The commutation device (4) includes a commutator body (401), one end of which is in contact with one end of the iron core sleeve (3).

3. The variable pitch DC motor rotor structure of claim 2, wherein, The outer surface of the commutator body (401) is connected to a plurality of commutator copper plates (402), and the number of commutator copper plates (402) is the same as the number of coil slots (9). A first threaded locking ring (403) is provided on one side of the commutator body (401).

4. The variable pitch DC motor rotor structure of claim 1, wherein, The blade component (5) includes a blade sleeve (501), the outer surface of which is in contact with the outer surface of one end of the drive shaft (1).

5. The variable pitch DC motor rotor structure of claim 4, wherein, The outer surface of the blade sleeve (501) is connected to a plurality of heat dissipation blades (502), and the outer surface of the drive shaft (1) is threadedly connected to a second threaded locking ring (503), one end of the second threaded locking ring (503) being in contact with one end of the blade sleeve (501).

6. The variable pitch DC motor rotor structure of claim 1, wherein, One end of each of the locking rods (11) passes through the through hole (10) and extends to one side of the through hole (10), and a locking nut (12) is threaded onto the outer surface of each of the locking rods (11).

7. The variable pitch DC motor rotor structure of claim 1, wherein The outer surface of the drive shaft (1) is provided with a plurality of grooves (7), and the inner wall of each groove (7) is slidably connected with a plurality of first limiting blocks (13) and a plurality of second limiting blocks (14).

8. The variable pitch DC motor rotor structure of claim 7, wherein, Each of the first limiting blocks (13) has its opposite side connected to the inner ring of the core sleeve (3), and each of the second limiting blocks (14) has its opposite side connected to the inner ring of the commutation device (4).

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