A motor rotor convenient to assemble

Abstract

The utility model provides a kind of motor rotor convenient to assemble, it is related to motor rotor technical field, including rotating shaft, the rotating shaft outside sleeve is equipped with iron core, the outside of iron core is equipped with several rotor slots, the inside of rotor slot is respectively equipped with bar, and assembling mechanism is installed between rotating shaft and iron core, the assembling mechanism includes press plate, the press plate is respectively movably penetrated and installed in the upper and lower ends of rotating shaft outside, and the press plate is respectively attached with the upper and lower sides of iron core.The utility model in the iron core and bar are realized to the two-way axial compression and radial location of bar end positioning groove by being cooperated with the assembling mechanism of press plate, positioning block, effectively prevent the axial movement and radial escape of iron core and bar under high speed and complex working condition, significantly improve the rigidity and operating reliability of rotor overall structure, prevent the vibration, noise and sweep bore risk caused by component loosening.

Description

Technical Field

[0001] This utility model relates to the field of motor rotor technology, and more specifically, to a motor rotor that is easy to assemble. Background Technology

[0002] The motor rotor is the rotating component in a motor. A motor consists of two parts: a rotor and a stator. It is a device used to convert electrical energy into mechanical energy and vice versa. Motor rotors are divided into motor rotors and generator rotors. For example, the core-assembled rotor for a motor proposed in application number "202220915281.3" includes a rotor body. An outer inverted triangular protrusion is provided on the outer side of the rotor body, and a rotor assembly core is installed on both sides of the outer inverted triangular protrusion. A front shoulder is provided at one end of the rotor body, and a bearing retainer section is machined on one side of the front shoulder. An extended shaft head is provided on the other side of the bearing retainer section, and a bearing liner is installed on the outer side of the extended shaft head. Bearing rollers are installed inside the bearing liner, and an end bearing outer ring is installed on the outer side of the bearing rollers. A first end contact plate is provided on one side of the end bearing outer ring.

[0003] However, although the radial fixation of the iron core is improved by the outer inverted triangular protrusion in the above technical solution, its axial fixation relies heavily on a single interference fit. Under the combined action of centrifugal force and electromagnetic force generated by high-speed rotation, as well as material fatigue and thermal cycling caused by long-term operation, the initial interference may be significantly reduced, which can easily cause axial movement of the iron core. This movement will not only produce abnormal noise and vibration, but may also cause uneven air gap. In severe cases, it may even cause stator and rotor rubbing, directly threatening the safe operation of the motor. Therefore, we propose a motor rotor that is easy to assemble to solve the above problems. Utility Model Content

[0004] The main purpose of this invention is to provide a motor rotor that is easy to assemble. It solves the problem that although the radial fixation of the iron core is improved by the outer inverted triangular protrusion, its axial fixation relies heavily on a single interference fit. Under the combined action of centrifugal force and electromagnetic force generated by high-speed rotation, as well as material fatigue and thermal cycling caused by long-term operation, the initial interference may be significantly reduced, which can easily cause axial movement of the iron core. This movement not only produces abnormal noise and vibration, but may also cause uneven air gap, and in severe cases, may even cause stator and rotor rubbing, directly threatening the safe operation of the motor.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] An easy-to-assemble motor rotor includes a shaft, an iron core sleeved on the outer side of the shaft, a plurality of rotor slots on the outer side of the iron core, guide bars installed inside the rotor slots, an assembly mechanism installed between the shaft and the iron core, the assembly mechanism including a pressure plate, the pressure plate being movably installed through the upper and lower ends of the outer side of the shaft, the pressure plate being in contact with the upper and lower sides of the iron core, a plurality of positioning blocks being arranged in a circumferential array on the side of the pressure plate near the iron core, the number of positioning blocks corresponding one-to-one with the number of guide bars, positioning grooves being provided on the upper and lower sides of the guide bars, the positioning blocks being engaged and installed inside the positioning grooves.

[0007] Preferably, a plurality of first threaded holes are provided between the pressure plate and the rotating shaft, and positioning bolts are respectively installed inside the overlapping first threaded holes by threads.

[0008] Preferably, the pressure plate has a plurality of second threaded holes inside, and counterweight bolts are installed inside the second threaded holes by threads.

[0009] Preferably, the shaft has several teeth installed in the middle of its outer side, and the iron core has several tooth grooves inside, with the teeth respectively engaging and installed inside the tooth grooves.

[0010] Preferably, bearings are fitted at both the upper and lower ends of the shaft, and a contact plate is installed at the end of the bearing closest to the iron core.

[0011] Preferably, the contact plate has several mounting holes running through its interior.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] (1) In this utility model, by setting up an assembly mechanism consisting of a pressure plate, a positioning block and a positioning groove at the end of the guide bar, the bidirectional axial pressing and radial limiting of the iron core and the guide bar are realized, which effectively prevents the axial movement and radial dislodgement of the iron core and the guide bar under high speed and complex working conditions, significantly improves the rigidity and operational reliability of the overall rotor structure, and eliminates the risk of vibration, noise and rubbing caused by loose parts.

[0014] (2) The present invention adopts a modular assembly design and integrates an independent balance adjustment structure, which makes the assembly process simpler and can achieve high-precision dynamic balance correction. The pressure plate and the shaft can be fixed by positioning bolts, making assembly and disassembly convenient. At the same time, the counterweight bolt mounting holes specially set on the pressure plate allow for fine counterweight adjustment after the rotor assembly, thereby effectively reducing vibration and noise during high-speed operation, improving the balance accuracy and running stability of the product, and extending the service life of the motor. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a motor rotor that is easy to assemble according to the present invention.

[0016] Figure 2 This is a front view schematic diagram of a motor rotor that is easy to assemble according to the present invention;

[0017] Figure 3 This utility model provides an easy-to-assemble motor rotor. Figure 2 Schematic diagram of the cross-sectional structure at point AA;

[0018] Figure 4 This utility model provides an easy-to-assemble motor rotor. Figure 2 Schematic diagram of the cross-sectional structure at point BB;

[0019] Figure 5 This utility model provides an easy-to-assemble motor rotor. Figure 2 Schematic diagram of the cross-sectional structure at the CC section;

[0020] Figure 6 This utility model provides an easy-to-assemble motor rotor. Figure 3 Enlarged structural diagram at point D;

[0021] Figure 7 This utility model provides an easy-to-assemble motor rotor. Figure 4 Enlarged structural diagram at point E;

[0022] Figure 8 This utility model provides an easy-to-assemble motor rotor. Figure 5 Enlarged structural diagram at point F.

[0023] In the diagram: 1. Shaft; 2. Bearing; 3. Contact plate; 4. Mounting hole; 5. Iron core; 6. Guide bar; 7. Assembly mechanism; 701. Pressure plate; 702. Positioning block; 703. Positioning groove; 704. First threaded hole; 705. Positioning bolt; 706. Second threaded hole; 8. Rotor slot; 9. Tooth; 10. Tooth groove. Detailed Implementation

[0024] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0025] like Figures 1 to 8As shown, this utility model embodiment proposes a motor rotor that is easy to assemble, including a rotating shaft 1, an iron core 5 sleeved on the outer side of the rotating shaft 1, a plurality of rotor slots 8 on the outer side of the iron core 5, guide bars 6 respectively installed inside the rotor slots 8, and an assembly mechanism 7 installed between the rotating shaft 1 and the iron core 5. The assembly mechanism 7 includes a pressure plate 701, which is movably installed through the upper and lower ends of the outer side of the rotating shaft 1. The pressure plate 701 is in contact with the upper and lower sides of the iron core 5. A plurality of positioning blocks 702 are arranged in a circumferential array on the side of the pressure plate 701 near the iron core 5, and the number of positioning blocks 702 corresponds one-to-one with the number of guide bars 6. Positioning grooves 703 are provided on the upper and lower sides of the guide bars 6, and the positioning blocks 702 are respectively engaged and installed inside the positioning grooves 703.

[0026] like Figures 3 to 8 As shown, in another embodiment of the present invention, a plurality of first threaded holes 704 are respectively provided between the pressure plate 701 and the rotating shaft 1. The first threaded holes 704 that overlap each other are respectively installed with positioning bolts 705 by threads. The pressure plate 701 is respectively provided with a plurality of second threaded holes 706. The second threaded holes 706 are respectively installed with counterweight bolts by threads. A plurality of teeth 9 are installed in the middle of the outer side of the shaft 1. The iron core 5 is provided with a plurality of tooth grooves 10. The teeth 9 are respectively engaged and installed in the tooth grooves 10. The upper and lower ends of the shaft 1 are respectively fitted with bearings 2. The end of the bearing 2 near the iron core 5 is respectively installed with a contact plate 3. A plurality of mounting holes 4 are respectively provided in the interior of the contact plate 3.

[0027] The iron core 5 is fitted onto the rotating shaft 1, so that the teeth 9 on the rotating shaft 1 and the tooth grooves 10 inside the iron core 5 engage with each other. Through the cooperation of the teeth 9 and the tooth grooves 10, the iron core 5 and the rotating shaft 1 are precisely positioned in the circumference and the torque is transmitted, which effectively prevents the iron core 5 from sliding in the circumference on the rotating shaft 1, laying a precise foundation for subsequent assembly. Then, the guide bars 6 are inserted one by one into the rotor grooves 8 on the outside of the iron core 5, completing the core construction of the motor rotor conductive circuit. The guide bars 6 are installed in the rotor grooves 8, which prepares for the subsequent formation of a complete squirrel cage through the end structure.

[0028] The pressure plates 701 at the top and bottom are fitted onto the rotating shaft 1, so that the positioning block 702 on the side of the pressure plate 701 near the iron core 5 is precisely engaged into the pre-set positioning groove 703 at the top and bottom of the guide bar 6, so that the pressure plate 701 fits against the iron core 5 and the teeth 9. Thus, through the engagement of the positioning block 702 and the positioning groove 703, the bidirectional axial pressing and radial limiting of the guide bar 6 and the entire iron core 5 stack are achieved, ensuring the structural integrity of the rotor under high-speed operation.

[0029] The positioning bolt 705 is passed through the first threaded hole 704 on the pressure plate 701 and the rotating shaft 1 and tightened to firmly fix the pressure plate 701 on the rotating shaft 1. This makes the axial compression state between the pressure plate 701, the iron core 5, the teeth 9 and the guide bar 6 finally locked, forming a high-rigidity integral rotor structure. Assembly and disassembly are very convenient, requiring only tightening or loosening of bolts, which greatly improves the maintainability of the product.

[0030] The assembled rotor assembly is tested on a dynamic balancing machine. Based on the test results, appropriate counterweight bolts are screwed into the second threaded hole 706 on the pressure plate 701. The counterweight bolts are installed using the second threaded hole 706, which allows for high-precision dynamic balancing correction after the rotor assembly is assembled. This makes the balance adjustment more precise and flexible without damaging the main structure, effectively reducing vibration and noise when the rotor is running at high speed, and significantly improving the stability and reliability of operation.

[0031] The working principle of this easy-to-assemble motor rotor:

[0032] In use, first, the iron core 5 is fitted onto the rotating shaft 1, ensuring that the teeth 9 on the shaft 1 are fully engaged with the toothed grooves 10 inside the iron core 5. Then, the guide bars 6 are inserted one by one into the rotor grooves 8 on the outside of the iron core 5. Next, the user fits the pressure plates 701 at the upper and lower ends onto the rotating shaft 1, so that the positioning blocks 702 on the side of the pressure plate 701 closest to the iron core 5 are precisely engaged into the pre-set positioning grooves 703 at the upper and lower ends of the guide bars 6, and the pressure plate 701 is tightly fitted to the end face of the iron core 5. After the pressure plate 701 is installed, the user can pass the positioning bolts 705 through the first threaded holes 704 on the pressure plate 701 and the rotating shaft 1 and tighten them to the specified torque. Finally, the assembled rotor assembly is placed on a dynamic balancing machine for testing. Based on the detected imbalance and phase, an appropriate amount and position of counterweight bolts are screwed into the second threaded holes 706 on the pressure plate 701.

[0033] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. Any obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.

Claims

1. An easy-to-assemble motor rotor, comprising a shaft (1), characterized in that: An iron core (5) is sleeved on the outside of the rotating shaft (1). Several rotor slots (8) are provided on the outside of the iron core (5). Guide bars (6) are installed inside the rotor slots (8). An assembly mechanism (7) is installed between the rotating shaft (1) and the iron core (5). The assembly mechanism (7) includes a pressure plate (701). The pressure plate (701) is movably installed through the upper and lower ends of the outside of the rotating shaft (1). The pressure plate (701) is in contact with the upper and lower sides of the iron core (5). Several positioning blocks (702) are arranged in a circular array on the side of the pressure plate (701) close to the iron core (5). The number of positioning blocks (702) corresponds one-to-one with the number of guide bars (6). Positioning slots (703) are provided on the upper and lower sides of the guide bars (6). The positioning blocks (702) are respectively engaged and installed inside the positioning slots (703).

2. The easily assembled motor rotor according to claim 1, characterized in that: A plurality of first threaded holes (704) are respectively provided between the pressure plate (701) and the rotating shaft (1), and positioning bolts (705) are respectively installed inside the overlapping first threaded holes (704) by threads.

3. The easily assembled motor rotor according to claim 1, characterized in that: The pressure plate (701) is provided with a number of second threaded holes (706) inside, and counterweight bolts are installed inside the second threaded holes (706) by threads.

4. The easily assembled motor rotor according to claim 1, characterized in that: The shaft (1) has several teeth (9) installed in the middle of the outer side of the shaft, and the iron core (5) has several tooth grooves (10) inside, and the teeth (9) are respectively engaged and installed inside the tooth grooves (10).

5. The easily assembled motor rotor according to claim 1, characterized in that: Bearings (2) are respectively installed at the upper and lower ends of the shaft (1), and a contact plate (3) is installed at the end of the bearing (2) near the iron core (5).

6. The easily assembled motor rotor according to claim 5, characterized in that: The contact plate (3) has several mounting holes (4) running through its interior.

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