CN210404933U - Outer rotor permanent magnet synchronous motor - Google Patents
Outer rotor permanent magnet synchronous motor Download PDFInfo
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- CN210404933U CN210404933U CN201921269756.0U CN201921269756U CN210404933U CN 210404933 U CN210404933 U CN 210404933U CN 201921269756 U CN201921269756 U CN 201921269756U CN 210404933 U CN210404933 U CN 210404933U
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- main shaft
- rear end
- permanent magnet
- magnet synchronous
- synchronous motor
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Abstract
The utility model discloses an outer rotor permanent magnet synchronous motor, including the rear end cap, with the relative fixed stator module of rear end cap, and with the relative rotation of rear end cap, and set up the rotor subassembly in the stator module outside, the rear end cap is the stair structure, it includes a hollow disc of major diameter and the drum structure that extends the setting on its central axis, be provided with quick latch mechanism on the outer terminal surface of hollow disc, drum structure overcoat is fixed with stator module, set firmly in the drum structure to overlap and establish on the main shaft and rather than the assorted bearing, the bearing is located the both ends of main shaft, and the axle center of the bearing that is located the main shaft both ends is in same straight line; one end of the main shaft extends out of the end part of the cylindrical structure and is fixed with the rotor assembly. The beneficial effects of the utility model are mainly embodied in that: the bearing is fixedly arranged in the cylindrical structure of the rear end cover and positioned at two ends of the main shaft instead of being assembled, so that the concentricity and the position degree of the bearing are effectively improved.
Description
Technical Field
The utility model relates to a synchronous machine technical field particularly, especially relates to an outer rotor permanent magnet synchronous machine.
Background
The outer rotor permanent magnet synchronous motor is applied to various occasions, but the problems that the precision is easily reduced in the assembling process due to the fact that the permanent magnet synchronous motor of the outer rotor is complex relative to the parts of the inner rotor permanent magnet synchronous motor, the operation noise of the motor is caused, the operation service life of the motor is influenced and the like are solved, and the outer rotor permanent magnet synchronous motor and the inner rotor permanent magnet synchronous motor cannot have the same application effect in many application fields. The bearing position in the permanent magnet synchronous outer rotor motor structure is influenced by the rotor structure and needs to be installed on one side of the rotor instead of two sides of the rotor, so that the concentricity of the two bearings influences the air gap between the rotor and the stator, and if the concentric line of the bearings is not perpendicular to the installation surface, the stability of output shaft torque output after the motor is installed is also influenced, vibration and noise are caused, and the service life of the motor is influenced.
The existing solution is to achieve the concentricity and position degree of bearing installation by high processing precision of the casing, the end cover and the bearing seat and high assembly precision, but the solution has high cost and high assembly requirement, and poor processing precision of any part can cause the operation of the whole motor to be influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough of prior art existence, provide an external rotor PMSM.
The purpose of the utility model is realized through the following technical scheme:
an outer rotor permanent magnet synchronous motor comprises a rear end cover, a stator assembly and a rotor assembly, wherein the stator assembly is fixed relative to the rear end cover, the rotor assembly rotates relative to the rear end cover and is arranged outside the stator assembly, the rear end cover is of a stepped structure and comprises a large-diameter hollow disc and a cylindrical structure, the cylindrical structure extends on the central axis of the hollow disc, a quick clamping mechanism is arranged on the outer end face of the hollow disc, the stator assembly is fixedly sleeved outside the cylindrical structure, bearings are fixedly arranged in the cylindrical structure and sleeved on a main shaft and matched with the main shaft, the bearings are arranged at two ends of the main shaft, and the axes of the bearings at two ends of the main shaft are positioned on the same straight line; one end of the main shaft extends out of the end part of the cylindrical structure and is fixed with the rotor assembly.
Preferably, the rotor assembly comprises a rotor body in a concave frame structure, a group of magnetic steels and an output shaft fixed on the rotor body are fixedly arranged on the inner wall of the rotor body, and the output shaft and the main shaft are coaxially fixed.
Preferably, a through hole is formed in the output shaft, and a spline connected with the spline groove of the main shaft is arranged in the through hole.
Preferably, the main shaft and the output shaft are in cold pressing interference fit.
Preferably, the stator assembly comprises a stator core arranged on the cylinder structure in a surrounding manner, a hall element is fixedly arranged on the stator core, insulation wallboards are fixedly arranged at two ends of the stator core, a winding is fixedly arranged on the insulation wallboards, and a hall plate is further arranged on the outer side surface of the winding, which is far away from the through hole.
Preferably, the bearing is a deep groove ball bearing.
Preferably, the quick clamping mechanism is a clamping jaw integrally formed with the rear end cover, and the clamping jaws are uniformly distributed on the periphery of the outer side surface of the hollow disc.
Preferably, the rear end cover is further sleeved with a sealing ring, and the sealing ring is located between the Hall plate and the inner wall of the rear end cover and is tightly attached to the Hall plate and the inner wall of the rear end cover.
Preferably, the rear end cover is further fixedly provided with a wire pressing plate for fixing an external wire through a screw, and the winding is a three-phase winding.
The beneficial effects of the utility model are mainly embodied in that:
1. the bearing is fixedly arranged in the cylindrical structure of the rear end cover and positioned at two ends of the main shaft instead of being assembled, so that the concentricity and the position degree of the bearing are effectively improved, in addition, only the machining precision of the rear end cover needs to be ensured, and other parts do not need to adopt strict machining precision, so that the complexity of motor assembly is effectively reduced, high-precision machining parts are reduced, and the overall cost of the motor is reduced;
2. the arrangement of the splines and the spline grooves can play a role in guiding the installation of the main shaft so as to improve the accuracy of the installation of the main shaft;
3. the main shaft is the passive rotation, when the rotor subassembly rotated, because the setting up of spline can make the main shaft rather than synchronous rotation, in addition, adopt between main shaft and the rotor to coldly press interference fit and can improve the reliability of being connected greatly, stop gliding phenomenon between main shaft and the rotor, prolong the life of main shaft.
Drawings
The technical scheme of the utility model is further explained by combining the attached drawings as follows:
FIG. 1: the utility model has a sectional view;
FIG. 2: the utility model discloses a side view of the middle rotor;
FIG. 3: the utility model discloses well stator module's structural schematic.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments shown in the drawings. However, these embodiments are not limited to the present invention, and structural, method, or functional changes made by those skilled in the art according to these embodiments are all included in the scope of the present invention.
The present invention is not limited to the above embodiments, and structural, methodological, or functional changes made by those skilled in the art according to the embodiments are all included in the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. Either mechanically or electrically. They may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1 to fig. 3, the utility model discloses an outer rotor permanent magnet synchronous motor includes rear end cap 1, main shaft 5, with rear end cap 1 relatively fixed's stator module 2, and with rear end cap 1 relatively rotates, and sets up rotor module 3 in the stator module 2 outside, the rear end cap is the stair structure, and it includes hollow disc 14 of a major diameter and extends the drum structure 13 that sets up on its central axis, stator module 2 sets firmly on drum structure 13.
The rotor assembly 3 comprises a rotor body 30 in a concave frame structure, a group of magnetic steels 4 and an output shaft 32 fixed on the rotor body 30 are fixedly arranged on the inner wall of the rotor body, and the output shaft 32 and the main shaft 5 are coaxially fixed. Preferably, magnet steel 4 sets firmly through glue on rotor subassembly 3, its fixed mode is not the utility model discloses a protection main points, consequently do not do too much repeated description here, of course, also can regard for other fixed modes, all belong to the utility model discloses a protection category.
The output shaft 32 is provided with a through hole 31, and a spline connected with the spline groove of the main shaft 5 is arranged in the through hole 31. The spline and the spline groove can guide the installation of the main shaft, so that the accuracy of the installation of the main shaft is improved. The main shaft 5 and the output shaft 32 are in cold pressing interference fit. The main shaft and the rotor are in cold pressing interference fit, so that the connection reliability can be greatly improved, the sliding phenomenon between the main shaft and the rotor is avoided, and the service life of the main shaft is prolonged.
The utility model discloses in, be provided with quick latch mechanism on the outer terminal surface of hollow disc 14, quick latch mechanism be with 1 an organic whole jack catch 15 that forms of rear end cap, jack catch 15 equipartition is in on all around of hollow disc 14 lateral surface. The claw 15 can be arranged on the guide rail of the electric door and window quickly, the installation is convenient, the motor is convenient to integrally disassemble, and the working efficiency is greatly improved.
The design points of the utility model lie in: the cylindrical structure 13 is internally and fixedly provided with bearings 6 which are sleeved on the main shaft 5 and are matched with the main shaft, the bearings 6 are positioned at two ends of the main shaft 5, and the axes of the bearings 6 positioned at two ends of the main shaft 5 are positioned on the same straight line. One end of the main shaft 5 extends out of the end of the cylindrical structure 13 and is fixed with the rotor assembly 3. The bearing 6 is fixedly arranged in the cylinder structure of the rear end cover 1 and is positioned at two ends of the main shaft instead of being assembled, the concentricity and the position degree of the bearing are effectively improved, meanwhile, only the machining precision of the rear end cover needs to be ensured, the strict machining precision of other parts is not needed, the complexity of motor assembly is effectively reduced, high-precision machining parts are reduced, and the overall cost of the motor is reduced.
In this embodiment bearing 6 is deep groove ball bearing, adopts deep groove ball bearing to utilize its operation that is applicable to high rotational speed even very high rotational speed, and it is little to have coefficient of friction, and limit speed is high, and can bear a certain amount and bear radial load and axial load, of course, also can adopt other bearings, the utility model discloses do not specifically prescribe a limit.
The utility model discloses in, this motor still can overlap and be equipped with protection casing or front end housing (not shown in the figure), the setting of protection casing or front end housing can prevent that the dust from carrying out inside the motor, prolongs its life. In addition, a sealing ring 16 is further sleeved on the rear end cover 1, and the sealing ring 16 is located between the hall plate 24 and the inner wall of the rear end cover 1 and is tightly attached to the hall plate and the inner wall of the rear end cover.
The working process of the utility model is simply explained as follows: when the stator assembly is introduced with three-phase alternating current which is subjected to pulse width modulation by a three-phase inverter, the stator assembly can generate a space magnetic field, and the space magnetic field interacts with the rotor assembly to generate electromagnetic torque output with the same rotating direction of the rotating magnetic field of the stator assembly. When the output torque exceeds the friction torque of the rotor assembly and the damping torque of the permanent magnet, the outer rotor permanent magnet synchronous motor starts to do work outwards and continuously accelerates until synchronization.
The outer rotor permanent magnet synchronous motor is applied to driving of the electric door and window, and is not a high-rotation-speed motor, so that a speed reducer is not needed when the outer rotor permanent magnet synchronous motor is applied to driving of the electric door and window, and the cost for installing the electric door and window can be greatly reduced by removing the speed reducer.
The outer rotor permanent magnet synchronous motor has the following specifications:
the number of poles of the motor is as follows: 20 poles;
rated torque: 1.7NM (150 KG × 2 double open);
rated rotation speed: 200rpm (maximum speed 0.5 m/s);
rated power: 50W;
the temperature of the use environment: -25 to 50 ℃;
relative humidity: less than or equal to 80 percent.
It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.
The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.
Claims (9)
1. An outer rotor permanent magnet synchronous motor is characterized in that: the rear end cover is of a stepped structure and comprises a large-diameter hollow disc (14) and a cylinder structure (13) extending on the central axis of the large-diameter hollow disc, the outer end face of the hollow disc (14) is provided with a quick clamping mechanism, the stator assembly (2) is fixedly sleeved outside the cylinder structure (13), bearings (6) which are sleeved on a main shaft (5) and matched with the main shaft (5) are fixedly arranged in the cylinder structure (13), the bearings (6) are located at two ends of the main shaft (5), and the axes of the bearings (6) located at two ends of the main shaft (5) are located on the same straight line; one end of the main shaft (5) extends out of the end part of the cylindrical structure (13) and is fixed with the rotor component (3).
2. The outer rotor permanent magnet synchronous motor of claim 1, wherein: the rotor assembly (3) comprises a rotor body (30) in a concave frame structure, a group of magnetic steels (4) and an output shaft (32) fixed on the rotor body (30) are fixedly arranged on the inner wall of the rotor assembly, and the output shaft (32) and the main shaft (5) are coaxially fixed.
3. The outer rotor permanent magnet synchronous motor of claim 2, wherein: the output shaft (32) is provided with a through hole (31), and a spline (33) connected with the spline groove of the main shaft (5) is arranged in the through hole (31).
4. The outer rotor permanent magnet synchronous motor of claim 3, wherein: the main shaft (5) and the output shaft (32) are in cold pressing interference fit.
5. The outer rotor permanent magnet synchronous motor of claim 4, wherein: stator module (2) are including enclosing to be established stator core (21) on drum structure (13), hall element (25) have set firmly on stator core (21), insulated wall board (22) have set firmly at the both ends of stator core (21), set firmly winding (23) on insulated wall board (22), wherein keep away from through hole (31) still be equipped with hall board (24) on the lateral surface of winding (23).
6. The outer rotor permanent magnet synchronous motor of claim 1, wherein: the bearing (6) is a deep groove ball bearing.
7. The outer rotor permanent magnet synchronous motor of claim 1, wherein: quick clamping mechanism be with jack catch (15) that rear end cap (1) an organic whole formed, jack catch (15) equipartition is in on all around of hollow disc (14) lateral surface.
8. The outer rotor permanent magnet synchronous motor of claim 5, wherein: the rear end cover (1) is further sleeved with a sealing ring (16), and the sealing ring (16) is located between the Hall plate (24) and the inner wall of the rear end cover (1) and tightly attached to the Hall plate and the inner wall of the rear end cover.
9. The outer rotor permanent magnet synchronous motor of claim 8, wherein: the rear end cover (1) is further fixedly provided with a line pressing plate (18) for fixing an external line through a screw (17), and the winding (23) is a three-phase winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921269756.0U CN210404933U (en) | 2019-08-07 | 2019-08-07 | Outer rotor permanent magnet synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921269756.0U CN210404933U (en) | 2019-08-07 | 2019-08-07 | Outer rotor permanent magnet synchronous motor |
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| Publication Number | Publication Date |
|---|---|
| CN210404933U true CN210404933U (en) | 2020-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921269756.0U Active CN210404933U (en) | 2019-08-07 | 2019-08-07 | Outer rotor permanent magnet synchronous motor |
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| Country | Link |
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| CN (1) | CN210404933U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114362073A (en) * | 2021-12-17 | 2022-04-15 | 中车永济电机有限公司 | Built-in junction box structure of mechanical large arm for roller of tunneling and anchoring machine |
-
2019
- 2019-08-07 CN CN201921269756.0U patent/CN210404933U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114362073A (en) * | 2021-12-17 | 2022-04-15 | 中车永济电机有限公司 | Built-in junction box structure of mechanical large arm for roller of tunneling and anchoring machine |
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