Rotor assembly structure

Abstract

A rotor assembly structure provided by the utility model relates to the technical field of traction machines, and comprises a rotor assembly, a stator assembly and a shell, the shell comprises an end cover and a machine base, the rotor assembly and the stator assembly are located in the shell, under the action of an assembly unit, the rotor assembly can be stabilized, and the assembly efficiency is improved. The stability and the safety of the rotor during installation are ensured; meanwhile, through the effect of the limiting unit, the effect of fixing the machine base can be achieved, the requirement that the stator is in a static state when the stator and the rotor are assembled is met, the new structure remarkably simplifies the transportation and installation process of the rotor, the double-tip fixing mode is more direct and rapid, the installation steps are reduced, and the installation efficiency is improved. And the requirement on the skill of installation personnel is reduced, so that the whole process is simpler and more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of traction machines, in particular to a rotor assembly structure. Background Art

[0002] With economic development and social progress, the demand for elevators is growing. As the power component of elevators, traction machines are attracting increasing attention. A traction machine is a mechanical device used to lift and transport heavy objects. It typically consists of an electric motor, one or more steel ropes, a pulley system, and a control system. Essentially, a traction machine is a permanent magnet synchronous motor. A permanent magnet synchronous motor primarily consists of a stator and a rotor. The stator is primarily composed of a stator core and stator windings. The stator core is formed by stacking high-permeability silicon steel sheets. The stator windings are copper wire wound around the stator core and consist of multiple coils or coil groups. During the production and assembly process of a permanent magnet synchronous motor, the stator must be pressed into the base before the rotor is installed. However, during installation, the permanent magnets on the rotor shaft have strong magnetism and attract the stator core, preventing assembly.

[0003] Currently, most manufacturers of permanent magnet synchronous motors rely on multiple limiting structures to prevent radial movement of the rotor to complete assembly. For example, patent document (CN202221060200.2) installs fixtures at both ends of the shaft to prevent radial movement and ensure smooth installation. However, installing fixtures at both ends of the shaft requires threaded holes at both ends, and assembly requires the fixtures to be installed before proceeding. This increases mechanical complexity, installation difficulty, and cost. Utility Model Content

[0004] The purpose of the present utility model is to provide a rotor assembly structure to solve the problem that when the rotor is installed, the permanent magnets on the rotating shaft have strong magnetism and will be attracted to the stator core, resulting in the inability to assemble. Tooling is installed at both ends of the rotating shaft, and threaded holes need to be drilled at both ends of the rotating shaft. During assembly, the tooling needs to be installed first and then assembly can be carried out, which to a certain extent increases the mechanical complexity, installation difficulty and cost.

[0005] The utility model provides a rotor assembly structure, comprising: a rotor assembly, a stator assembly and a housing, wherein the housing comprises an end cover and a base, and the rotor assembly and the stator assembly are located inside the housing;

[0006] Also includes:

[0007] an assembly unit, the assembly unit being used for assembling the rotor assembly and the stator assembly, the assembly unit being located outside the rotor assembly and the stator assembly;

[0008] A limiting unit is used to fix the position of the base, and the limiting unit is located outside the base.

[0009] In an alternative embodiment,

[0010] The rotor assembly includes a rotating shaft, the diameter of the two ends of the rotating shaft is smaller than the diameter of the middle part of the rotating shaft, and the rotating shaft is stepped as a whole. The outer surfaces of the two ends of the rotating shaft are respectively equipped with a first bearing and a second bearing. The first bearing is located on the side of the rotating shaft close to the end cover, and the second bearing is located on the side of the rotating shaft close to the machine base. The rotating shaft is rotatably connected to the end cover and the machine base respectively through the first bearing and the second bearing. A permanent magnet is fixedly mounted on the outer surface of the middle part of the rotating shaft.

[0011] In an alternative embodiment,

[0012] The stator assembly includes an iron core fixedly mounted inside the base, wherein the iron core and the base are coaxial, and a plurality of stator windings equidistantly distributed around the circumference are arranged outside the iron core.

[0013] In an alternative embodiment,

[0014] The permanent magnets are not in contact with the stator windings.

[0015] In an alternative embodiment,

[0016] The two ends of the rotating shaft rotate and penetrate the end cover and the machine base, and the rotating shaft, the end cover and the machine base are coaxial.

[0017] In an alternative embodiment,

[0018] The assembly unit includes a first top and a second top, the first top and the second top are coaxially distributed, and the first top and the second top do not contact the end cover and the machine base;

[0019] The machine further comprises: a first telescopic component and a second telescopic component, a guide rail being placed at the bottom of the machine base, a slider seat being slidably mounted on the guide rail, the first telescopic component and the second telescopic component each comprising a fixed portion and a telescopic portion, and the fixed portions of the first telescopic component and the second telescopic component are both fixedly disposed on the slider seat, the telescopic portions of the first telescopic component and the second telescopic component are relatively distributed, and the telescopic portions of the two are fixed to the first top and the second top, respectively;

[0020] A driving motor is fixedly mounted on one end of the guide rail, and a threaded rod is fixedly provided on the output end of the driving motor. The threaded rod is rotatably mounted on the guide rail at one end away from the driving motor, and the slider seat is threadedly assembled on the outside of the threaded rod.

[0021] In an alternative embodiment,

[0022] The first tip and the second tip each have a pointed cone shape at one end facing the interior of the shell.

[0023] In an alternative embodiment,

[0024] A first process hole and a second process hole are respectively formed at both ends of the rotating shaft, and the first process hole and the second process hole are coaxially distributed. Both the first process hole and the second process hole are in a pointed cone shape.

[0025] In an alternative embodiment,

[0026] The limiting unit includes a limiting clamp, and the limiting clamp is used to fix the machine base above the guide rail.

[0027] In an alternative embodiment,

[0028] The interiors of the first bearing and the second bearing are filled with grease.

[0029] Compared with the prior art, the beneficial effects of the present invention are:

[0030] The utility model provides a rotor assembly structure, which, under the action of the assembly unit, can stabilize the assembly of the rotor assembly and ensure the stability and safety of the rotor assembly during installation; at the same time, through the action of the limit unit, it can fix the machine base to meet the requirement that the stator assembly is in a stationary state when the stator assembly and the rotor assembly are assembled. This new structure significantly simplifies the transportation and installation process of the rotor assembly, and the double-center fixing method is more direct and quick, which not only reduces the installation steps, but also reduces the skill requirements of the installer, making the entire process simpler. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 A schematic diagram of the overall structure of a rotor assembly structure provided by an embodiment of the present utility model;

[0033] Figure 2 A schematic diagram of a rotor assembly structure provided by an embodiment of the present invention in which the first and second centers are in contact with the rotating shaft;

[0034] Figure 3 This is a schematic assembly diagram of a rotor assembly structure provided by an embodiment of the present utility model.

[0035] Icons: 1-first center; 2-end cover; 3-first bearing; 4-rotating shaft; 5-permanent magnet; 6-second bearing; 7-stator winding; 8-iron core; 9-machine base; 10-second center; 11-first process hole; 12-second process hole. DETAILED DESCRIPTION

[0036] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0037] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0039] The following is a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0040] Example 1

[0041] See also Figure 1 — Figure 3 , this embodiment provides a rotor assembly structure, including:

[0042] The rotor assembly, the stator assembly and the housing, the housing including the end cover 2 and the base 9, and the rotor assembly and the stator assembly are located inside the housing;

[0043] Also includes:

[0044] An assembly unit, which is used for assembling the rotor assembly and the stator assembly, and is located outside the rotor assembly and the stator assembly;

[0045] The limiting unit is used to fix the position of the machine base 9 and is located outside the machine base 9.

[0046] The rotor assembly structure provided in this embodiment can stabilize the assembly of the rotor assembly under the action of the assembly unit, ensuring the stability and safety of the rotor assembly during installation; at the same time, through the action of the limit unit, it can fix the machine base 9 to meet the requirement that the stator assembly is in a stationary state when the stator assembly and the rotor assembly are assembled. This new structure significantly simplifies the transportation and installation process of the rotor assembly. The double-center fixing method is more direct and quick, which not only reduces the installation steps, but also reduces the skill requirements of the installer, making the entire process simpler.

[0047] Based on the above embodiment, this embodiment provides a rotor assembly structure in which the rotor assembly includes a rotating shaft 4, wherein the diameter of the two ends of the rotating shaft 4 is smaller than the diameter of the middle portion of the rotating shaft 4, and the rotating shaft 4 is stepped as a whole. The outer surfaces of the two ends of the rotating shaft 4 are respectively equipped with a first bearing 3 and a second bearing 6, the first bearing 3 is located on the side of the rotating shaft 4 close to the end cover 2, and the second bearing 6 is located on the side of the rotating shaft 4 close to the machine base 9. The rotating shaft 4 is rotatably connected to the end cover 2 and the machine base 9 respectively through the first bearing 3 and the second bearing 6, and a permanent magnet 5 is fixedly sleeved on the outer surface of the middle portion of the rotating shaft 4;

[0048] The rotating shaft 4 is usually made of high-strength metal material to ensure sufficient strength and rigidity to cope with the force and torque during rotation. The permanent magnet 5 on the rotor assembly generates a magnetic field, which interacts with the stator winding 7 on the stator assembly to generate electromagnetic force, so that the permanent magnet synchronous motor can operate. The permanent magnet 5 in the rotor assembly can be a rare earth magnet or a permanent magnet alloy material. These permanent magnets 5 have high magnetization intensity and stable magnetism and can generate a strong magnetic field. The first bearing 3 and the second bearing 6 reduce the friction and wear generated by the rotor assembly during rotation.

[0049] The stator assembly includes an iron core 8 fixedly mounted inside a base 9, and the iron core 8 and the base 9 are coaxial, and a plurality of stator windings 7 are arranged on the outside of the iron core 8 and are evenly spaced around the circumference;

[0050] The iron core 8 in the stator assembly is made of silicon steel sheets or other magnetically permeable materials. The iron core 8 plays a role in strengthening the magnetic circuit and concentrating the magnetic field in the stator assembly to increase the efficiency of the motor. The stator winding 7 fixedly arranged on the outer surface of the iron core 8 generates a magnetic field through the flow of current in and out, which interacts with the magnetic field generated by the permanent magnet 5, thereby generating electromagnetic force.

[0051] The permanent magnet 5 does not contact the stator winding 7;

[0052] The spacing between the stator winding 7 and the permanent magnet 5 can control the distribution and influence of the magnetic field, optimize the performance and efficiency of the permanent magnet synchronous motor, and at the same time, the spacing between the stator winding 7 and the permanent magnet 5 can also reduce the leakage of the magnetic field and improve the utilization rate of the magnetic field.

[0053] The two ends of the rotating shaft 4 rotate through the end cover 2 and the machine base 9, and the rotating shaft 4, the end cover 2 and the machine base 9 are coaxial;

[0054] The rotating shaft 4, the end cover 2 and the machine base 9 are coaxial, and the rotating shaft 4 passes through the end cover 2 and the machine base 9, which is conducive to the installation and positioning of the rotor assembly and the stator assembly, making the installation position more accurate.

[0055] The assembly unit includes a first top 1 and a second top 10, which are coaxially distributed. The first top 1 and the second top 10 do not contact the end cover 2 and the machine base 9;

[0056] The first tip 1 and the second tip 10 do not contact the end cover 2 and the machine base 9, which effectively avoids being obstructed by the end cover 2 and the machine base 9 during the process of clamping the rotor assembly.

[0057] It also includes: a first telescopic component and a second telescopic component. A guide rail is placed at the bottom of the machine base 9, and a slider seat is slidably mounted on the guide rail. The first telescopic component and the second telescopic component both include a fixed portion and a telescopic portion, and the fixed portions of the first telescopic component and the second telescopic component are both fixedly arranged on the slider seat. The telescopic portions of the first telescopic component and the second telescopic component are relatively distributed, and the telescopic portions of the two are respectively fixed to the first top 1 and the second top 10;

[0058] By using the guide rail, the slider seat, the first telescopic component and the second telescopic component, when clamping the stator assembly, pressure can be applied to both ends of the rotating shaft 4 to clamp it, and after the rotor assembly and the stator assembly are installed, the rotating shaft 4 can be released.

[0059] A drive motor is fixedly mounted on one end of the guide rail, and a threaded rod is fixedly provided on the output end of the drive motor. The end of the threaded rod away from the drive motor is rotatably mounted on the guide rail, and the slider seat is threadedly assembled on the outside of the threaded rod.

[0060] After the clamping is completed, the driving motor can drive the threaded rod to rotate. The rotation of the threaded rod causes the slider seat to slide on the threaded rod, so that the first telescopic part and the second telescopic part on the slider seat drive the rotor assembly to slide on the top of the guide rail, and transport the rotor assembly to the installation site for installation.

[0061] The first tip 1 and the second tip 10 are in a pointed cone shape at one end facing the interior of the housing;

[0062] The ends of the first tip 1 and the second tip 10 are in a pointed cone shape, which is convenient for clamping the rotating shaft 4 .

[0063] A first process hole 11 and a second process hole 12 are respectively formed at both ends of the rotating shaft 4, and the first process hole 11 and the second process hole 12 are coaxially distributed, and both the first process hole 11 and the second process hole 12 are in a pointed cone shape;

[0064] The first process hole 11 and the second process hole 12 are coaxially distributed, making the subsequent process of clamping the rotating shaft 4 more stable, so as to ensure the stability and safety of the rotor assembly during transportation to the stator assembly. At the same time, the first process hole 11 and the second process hole 12 are in the shape of a pointed cone, and the shapes of the first process hole 11, the second process hole 12 and the first top 1 and the second top 10 match each other, which is conducive to clamping the rotor assembly, making the clamping process more stable, and avoiding the rotor assembly from falling during the process of clamping.

[0065] The limiting unit includes a limiting clamp, which is used to fix the base 9 above the guide rail;

[0066] The limiting clamp plays a role in fixing the machine base 9, so that when the stator assembly and the rotor assembly are installed, the stator assembly is fixed, the installation requirements of the stator assembly and the rotor assembly are met, and the occurrence of incomplete or unsuccessful installation is avoided.

[0067] The interior of the first bearing 3 and the second bearing 6 are filled with grease;

[0068] The grease can form a lubricating film inside the first bearing 3 and the second bearing 6, reducing the friction generated by the rotation of the shaft 4, thereby reducing the friction coefficient of the first bearing 3 and the second bearing 6, which helps to reduce energy loss, extend the service life of the first bearing 3 and the second bearing 6, and reduce their wear.

[0069] Working principle:

[0070] The staff first fixes the machine base 9 with a limiting clamp to facilitate the subsequent installation of the rotor assembly and the stator assembly. Then the staff starts the first telescopic component and the second telescopic component, and uses the symmetrically distributed telescopic parts of the first telescopic component and the second telescopic component to drive the first top 1 and the second top 10 to slide, thereby clamping the rotating shaft 4. After the rotor assembly is clamped stably and firmly, the staff starts the drive motor, and the output end of the drive motor drives the threaded rod to rotate on the guide rail, and the slider seat threadedly assembled on the outer surface of the threaded rod slides on the guide rail as the threaded rod rotates, so that the slider seat slides on the guide rail, driving the first telescopic component and the second telescopic component to enter the interior of the stator assembly, and the rotor assembly fixed by the first telescopic component and the second telescopic component also enters the interior of the stator assembly and is installed.

[0071] After the installation is completed, the staff first controls the first telescopic component and the second telescopic component so that the first top 1 and the second top 10 change the rotating shaft 4 from a clamping state to a loose state, and the telescopic parts of the first telescopic component and the second telescopic component are completely retracted so that the first top 1 and the second top 10 do not affect the removal of the permanent magnet synchronous motor after installation. Then the staff releases the fixation of the limit clamp on the machine base 9, and finally takes out the installed permanent magnet synchronous motor.

[0072] After completing the installation of the stator assembly and the rotor assembly, the staff controls the drive motor, the first telescopic part and the second telescopic part to restore the slider seat, the first top 1 and the second top 10 to their initial positions, so as to facilitate the subsequent assembly of the permanent magnet synchronous motor on the production line.

[0073] Example 2

[0074] See also Figure 3 , this embodiment describes another implementation of the first telescopic component and the second telescopic component:

[0075] The first telescopic component and the second telescopic component can be an electric push rod or a cylinder, the fixed part is a base or a cylinder, and the telescopic part is a push rod or a piston rod.

[0076] In this embodiment:

[0077] The use of electric push rods enables high-speed and precise clamping of rotor components, meeting the needs of rapid production and installation on the production line and greatly improving production efficiency.

[0078] By using the cylinder, higher torque and force are provided during the process of clamping the rotating shaft 4, making the rotor assembly more stable during telescopic clamping.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rotor assembly structure, characterized in that: include: A rotor assembly, a stator assembly and a housing, wherein the housing comprises an end cover (2) and a base (9), and the rotor assembly and the stator assembly are located inside the housing; Also includes: an assembly unit, the assembly unit being used for assembling the rotor assembly and the stator assembly, the assembly unit being located outside the rotor assembly and the stator assembly; A limiting unit, the limiting unit is used to fix the position of the machine base (9), and the limiting unit is located outside the machine base (9); The assembly unit comprises a first top (1) and a second top (10), wherein the first top (1) and the second top (10) are coaxially distributed, and neither the first top (1) nor the second top (10) contacts the end cover (2) and the machine base (9); It also includes: a first telescopic component and a second telescopic component, a guide rail is placed at the bottom of the machine base (9), a slider seat is slidably mounted on the guide rail, the first telescopic component and the second telescopic component each include a fixed portion and a telescopic portion, and the fixed portions of the first telescopic component and the second telescopic component are both fixedly arranged on the slider seat, the telescopic portions of the first telescopic component and the second telescopic component are relatively distributed, and the telescopic portions of the two are respectively fixed to the first top (1) and the second top (10); A driving motor is fixedly mounted on one end of the guide rail, and a threaded rod is fixedly provided on the output end of the driving motor. The threaded rod is rotatably mounted on the guide rail at one end away from the driving motor, and the slider seat is threadedly assembled on the outside of the threaded rod.

2. The rotor assembly structure according to claim 1, characterized in that: The rotor assembly includes a rotating shaft (4), wherein the diameters of both ends of the rotating shaft (4) are smaller than the diameter of the middle portion of the rotating shaft (4), and the rotating shaft (4) is stepped as a whole. The outer surfaces of both ends of the rotating shaft (4) are respectively equipped with a first bearing (3) and a second bearing (6), wherein the first bearing (3) is located on a side of the rotating shaft (4) close to the end cover (2), and the second bearing (6) is located on a side of the rotating shaft (4) close to the machine base (9), and the rotating shaft (4) is rotatably connected to the end cover (2) and the machine base (9) respectively through the first bearing (3) and the second bearing (6), and a permanent magnet (5) is fixedly mounted on the outer surface of the middle portion of the rotating shaft (4).

3. The rotor assembly structure according to claim 2, characterized in that: The stator assembly comprises an iron core (8) fixedly mounted inside the machine base (9), wherein the iron core (8) and the machine base (9) are coaxial, and a plurality of stator windings (7) equidistantly distributed around the circumference are arranged outside the iron core (8).

4. The rotor assembly structure according to claim 3, characterized in that: The permanent magnet (5) is not in contact with the stator winding (7).

5. The rotor assembly structure according to claim 2, characterized in that: The two ends of the rotating shaft (4) rotate through the end cover (2) and the machine base (9), and the rotating shaft (4), the end cover (2) and the machine base (9) are coaxial.

6. The rotor assembly structure according to claim 1, characterized in that: The first tip (1) and the second tip (10) have a pointed cone shape at one end facing the interior of the shell.

7. The rotor assembly structure according to claim 2, characterized in that: A first process hole (11) and a second process hole (12) are respectively provided at both ends of the rotating shaft (4), and the first process hole (11) and the second process hole (12) are coaxially distributed, and both the first process hole (11) and the second process hole (12) are in a pointed cone shape.

8. The rotor assembly structure according to claim 1, characterized in that: The limiting unit comprises a limiting clamp, and the limiting clamp is used to fix the machine base (9) above the guide rail.

9. The rotor assembly structure according to claim 2, characterized in that: The interiors of the first bearing (3) and the second bearing (6) are filled with lubricating grease.

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