Stator structure of external rotor motor and motor
By setting the stator base bearing position and the stator upper bearing position at both ends of the motor stator core, the two bearings are located outside the two end surfaces of the stator core, the problem of limited motor power output in the long and narrow space is solved, and a smaller motor radial size and a more flexible installation and disassembly process is achieved.
Patent Information
- Application Number
- CN202421497095.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-27
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-06-27
AI Technical Summary
In the narrow and long spaces, the existing motor designs are limited in volume and power output, resulting in complex equipment structure or limited in use flexibility.
A stator structure of an outer rotor motor is designed. By setting the stator base bearing position and the upper bearing position of the stator core at both ends of the stator core, the two bearings are located outside the two end surfaces of the stator core, thereby reducing the radial dimension of the motor and facilitating the installation and disassembly of the stator core.
It realizes the use scenario of the motor in a narrow and long environment without increasing the body size and power of the motor, reduces the radial dimension of the motor, and simplifies the installation and disassembly of the stator structure.
Smart Images
Figure CN222750244U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, and in particular to a stator structure of an outer rotor motor and the motor. Background Art
[0002] In some narrow and long space situations, the design power of the motor is often limited due to the constraint of size. In order to make the motor power meet the power output requirements, the existing technology either uses dual motors or multiple motors to jointly output torque, which makes the overall structure of the equipment complex; or adopts universal joints or other forms to provide power output, but this will greatly limit the flexibility of the equipment, so the use of motors in narrow and long space environments is often limited. Utility Model Content
[0003] The purpose of the utility model is to overcome the problems in the prior art and to provide a stator structure of an outer rotor motor and a motor that can increase the use scenarios of the motor in a narrow and long environment while ensuring that the volume of the motor itself does not increase and the power remains unchanged.
[0004] The stator structure of the outer rotor motor provided by the utility model comprises:
[0005] An axial stator seat comprises a stator base and a stator upper bearing seat, wherein the stator base and the stator upper bearing seat are detachably connected at one end close to each other, a stator base bearing seat is provided at one end of the stator base away from the stator upper bearing seat, and a stator upper bearing seat is provided at one end of the stator upper bearing seat away from the stator base, and the stator base bearing seat is coaxially arranged with the stator upper bearing seat bearing seat;
[0006] The two ends of the stator core are respectively sleeved and connected to the stator base and one end of the stator upper bearing seat close to each other.
[0007] Preferably, a stator base step shaft is provided at one end of the stator base close to the stator upper bearing seat, and a stator upper bearing seat step shaft is provided at one end of the stator upper bearing seat close to the stator base, and an interference fit is formed between the stator base step shaft and the stator upper bearing seat step shaft.
[0008] Preferably, a stator base pin hole is provided on the outer wall of one end of the stator base close to the stator upper bearing seat, a stator upper bearing seat pin hole is provided on the outer wall of one end of the stator upper bearing seat close to the stator base, and a stator core pin hole is provided on the inner wall of the stator core, and the positions of the stator base pin hole, the stator upper bearing seat pin hole and the stator core pin hole match each other, so that the stator base, the stator upper bearing seat and the stator core are circumferentially positioned by a cylindrical pin.
[0009] Preferably, the stator core and the stator upper bearing seat have an interference fit, and the stator core and the stator base have an interference fit.
[0010] A motor having a stator structure of an outer rotor motor as described in any one of the above, further comprising two bearings and a rotor assembly, wherein the two bearings are respectively interference-fitted at two ends of an axial stator seat through a stator base bearing position and a stator upper bearing seat bearing position, and the rotor assembly is rotatably connected to the axial stator seat through the two bearings.
[0011] Preferably, a through hole is provided on the axial stator seat, and the through hole is coaxially arranged with the stator base bearing position and the stator upper bearing seat bearing position. The rotor assembly includes a rotor main shaft, a rotor top cover, a rotor yoke and a plurality of permanent magnets. The rotor main shaft passes through a bearing, a through hole and another bearing in sequence and is connected to two bearings. The rotor top cover is sleeved and fixedly connected to one end of the rotor main shaft. The rotor yoke is sleeved outside the stator core, and one end of the rotor yoke is fixedly connected to the rotor top cover. The permanent magnets are sequentially connected to the inner wall of the rotor yoke.
[0012] Preferably, the rotor top cover is interference fit with the rotor main shaft.
[0013] Preferably, the rotor top cover is interference fit with one end of the rotor yoke, and the rotor top cover and the rotor yoke are fixedly connected by screws.
[0014] Preferably, a flat gasket and a shaft clamp are sleeved on one end of the rotor main shaft away from the rotor top cover to ensure a tight connection between the rotor main shaft and the bearing.
[0015] Compared with the prior art, the utility model has the following advantages:
[0016] The stator structure of the outer rotor motor of the utility model arranges the bearing position of the stator base and the bearing position of the stator upper bearing seat outside the two end surfaces of the stator core, so that the two bearings connecting the rotor assembly and the stator structure are located outside the two end surfaces of the stator core, thereby ensuring that the radial size of the motor stator can be further reduced, so as to provide a motor design scheme with a narrower and longer space, and reduce the radial size of the motor; at the same time, it is convenient to install and sleeve the stator core on the stator base and the stator upper bearing seat, so as to facilitate its installation and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of a three-dimensional structure of a motor;
[0018] Figure 2 The figure is a schematic diagram of an exploded view of a motor;
[0019] Figure 3 It is a schematic diagram of a front view of a motor and a schematic diagram of a cross-sectional view at AA;
[0020] Figure 4It is a schematic diagram of a three-dimensional structure of a stator structure of an outer rotor motor;
[0021] Figure 5 It is a schematic diagram of a front view of the stator structure of an outer rotor motor and a cross-sectional view at BB;
[0022] Figure 6 It is a schematic diagram of a three-dimensional structure of a stator core of a stator structure of an outer rotor motor;
[0023] Figure 7 It is a schematic diagram of a first three-dimensional structural diagram of a stator base of a stator structure of an outer rotor motor;
[0024] Figure 8 A schematic diagram of a second three-dimensional structural diagram of a stator base of a stator structure of an outer rotor motor;
[0025] Fig. 9 The present invention is a schematic diagram of the three-dimensional structure of a stator upper bearing seat of a stator structure of an outer rotor motor.
[0026] Description of reference numerals:
[0027] 1. Rotor assembly; 101. Rotor main shaft; 102. Rotor top cover; 103. Permanent magnet; 104. Screw; 105. Rotor yoke; 201. Bearing; 202. Stator upper bearing seat; 2021. Stator upper bearing seat pin hole; 2022. Stator upper bearing seat stepped barrel shaft; 2023. Stator upper bearing seat bearing position; 203. Cylindrical pin; 204. Winding coil; 205. Stator core; 2051. Stator core pin hole; 206. Stator base; 2061. Stator base pin hole; 2062. Stator base stepped barrel shaft; 2063. Stator base bearing position; 207. Flat gasket; 208. Shaft clamp. DETAILED DESCRIPTION
[0028] The following is combined with Figure 1-9 , the specific implementation of the utility model is described in detail, but it should be understood that the protection scope of the utility model is not limited by the specific implementation. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0029] The stator structure of the outer rotor motor provided by the utility model comprises a stator core 205, a winding coil 204 wound on the stator core 205, and an axial stator seat, the axial stator seat comprises a stator base 206 and a stator upper bearing seat 202, the stator base 206 and the stator upper bearing seat 202 are detachably fixedly connected at one end close to each other, a stator base bearing position 2063 is provided at one end of the stator base 206 away from the stator upper bearing seat 202, a stator upper bearing seat bearing position 2023 is provided at one end of the stator upper bearing seat 202 away from the stator base 206, the stator base bearing position 2063 is coaxially arranged with the stator upper bearing seat bearing position 2023, and two ends of the stator core 205 are respectively sleeved and connected to the stator base 206 and the stator upper bearing seat 202 at one end close to each other;
[0030] By arranging the stator base bearing position 2063 and the stator upper bearing seat bearing position 2023 outside the two end surfaces of the stator core, the two bearings 201 connecting the rotor assembly 1 and the stator structure are located outside the two end surfaces of the stator core 205, thereby ensuring that the radial dimension of the motor stator can be further reduced, so as to provide a motor design scheme for a narrower and longer space, thereby reducing the radial dimension of the motor; at the same time, it is convenient to install and sleeve the stator core 205 on the stator base 206 and the stator upper bearing seat 202, so as to facilitate its installation and disassembly.
[0031] As a preferred embodiment, the stator base 206 and the stator upper bearing seat 202 are respectively provided with a stator base step shaft 2062 and a stator upper bearing seat step shaft 2022 at one end close to each other, and the stator base step shaft 2062 and the stator upper bearing seat step shaft 2022 are interference fit. Specifically, the stator base step shaft 2062 and the stator upper bearing seat step shaft 2022 can be of different lengths and different diameters, and the size can be changed according to the size and length of the stator core 205. The above technical scheme is adopted to facilitate the stable connection between the stator base 206 and the stator upper bearing seat 202, and to facilitate their installation and disassembly. Compared with glue connection, interference fit can avoid the use of glue; compared with screw connection, it can reduce the use of processing and screws; compared with key connection, it can reduce the use of processing and keys.
[0032] As a preferred embodiment, the stator base 206 and the stator upper bearing seat 202 are provided with a stator base pin hole 2061 and a stator upper bearing seat pin hole 2021 on the outer wall close to each other, and the inner wall of the stator core 205 is provided with a stator core pin hole 2051. The positions of the stator base pin hole 2061, the stator upper bearing seat pin hole 2021 and the stator core pin hole 2051 match each other, so as to fix the stator base 206 and the stator upper bearing seat 202 through a cylindrical pin 203. The stator core 205 is circumferentially positioned. By adopting the above technical scheme, the stator base 206, the stator upper bearing seat 202 and the stator core 205 can be stably circumferentially positioned. The stator base pin hole 2061, the stator upper bearing seat pin hole 2021 and the stator core pin hole 2051 can be of different lengths and different diameters. The size can be changed according to the size, length and wall thickness of the stator core 205, the stator upper bearing seat 202 and the stator base 206.
[0033] As a preferred manner, the stator core 205 and the stator upper bearing seat 202 have an interference fit, and the stator core 205 and the stator base 206 have an interference fit. When the motor is powered on to cause the rotor part 1 to rotate, the mutual cooperation of the stator core 205, the stator upper bearing seat 202, the stator base 206 and the cylindrical pin 203 ensures that the motor rotor rotates stably.
[0034] A motor having a stator structure of an outer rotor motor using any of the above items, further comprising two bearings 201 and a rotor assembly 1, wherein the outer walls of the two bearings 201 are respectively interference-fitted at the two ends of the shaft-shaped stator seat through a stator base bearing position 2063 and a stator upper bearing seat bearing position 2023, and the rotor assembly 1 is rotatably connected to the shaft-shaped stator seat through the two bearings 201.
[0035] As a preferred embodiment, a through hole is provided on the shaft-shaped stator seat, and the through hole is coaxially arranged with the stator base bearing position 2063 and the stator upper bearing seat bearing position 2023. The rotor assembly 1 includes a rotor main shaft 101, a rotor top cover 102, a rotor yoke 105 and a plurality of permanent magnets 103. The rotor main shaft 101 passes through a bearing 201, the through hole and another bearing 201 in sequence, and is connected to the two bearings 201. Specifically, the stator base 206 and the stator upper bearing seat 202 are coaxially arranged hollow cylinders, so that the stator base bearing position 2063 and the stator upper bearing seat The bearing seat 2023 of the bearing seat is provided with a coaxial through hole. The stator base 206 and the stator upper bearing seat 202 can ensure the coaxiality and tightness of the upper and lower bearings 201 and the overall structure through the interference fit of the stator base step cylinder shaft 2062 and the stator upper bearing seat step cylinder shaft 2022. The rotor top cover 102 is sleeved and fixedly connected to one end of the rotor main shaft 101, the rotor yoke 105 is sleeved outside the stator core 205, and one end of the rotor yoke 105 is fixedly connected to the rotor top cover 102, and the permanent magnets 103 are connected to the inner wall of the rotor yoke 105 in sequence.
[0036] As a preferred manner, the rotor top cover 102 and the rotor main shaft 101 are interference fit.
[0037] As a preferred manner, the rotor top cover 102 is interference fit with one end of the rotor yoke 105 , and the rotor top cover 102 and the rotor yoke 105 are also fixedly connected by screws 104 .
[0038] As a preferred manner, a flat gasket 207 and a shaft clamp 208 are sleeved on one end of the rotor main shaft 101 away from the rotor top cover 102 to ensure a tight connection between the rotor main shaft 101 and the bearing 201 .
[0039] In the description of the utility model, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.
[0040] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A stator structure of an outer rotor motor, characterized in that: include: An axial stator seat comprises a stator base (206) and a stator upper bearing seat (202); the stator base (206) and the stator upper bearing seat (202) are detachably connected at one end close to each other; a stator base bearing seat (2063) is provided at one end of the stator base (206) away from the stator upper bearing seat (202); a stator upper bearing seat bearing seat (2023) is provided at one end of the stator upper bearing seat (202) away from the stator base (206); and the stator base bearing seat (2063) and the stator upper bearing seat bearing seat (2023) are coaxially arranged; The stator core (205) has two ends respectively sleeved and connected to the stator base (206) and one end of the stator upper bearing seat (202) close to each other.
2. The stator structure of the outer rotor motor according to claim 1, characterized in that: A stator base step shaft (2062) is provided at one end of the stator base (206) close to the stator upper bearing seat (202), and a stator upper bearing seat step shaft (2022) is provided at one end of the stator upper bearing seat (202) close to the stator base (206), and an interference fit is formed between the stator base step shaft (2062) and the stator upper bearing seat step shaft (2022).
3. The stator structure of the outer rotor motor according to claim 2, characterized in that: A stator base pin hole (2061) is provided on the outer wall of one end of the stator base (206) close to the stator upper bearing seat (202); a stator upper bearing seat pin hole (2021) is provided on the outer wall of one end of the stator upper bearing seat (202) close to the stator base (206); a stator core pin hole (2051) is provided on the inner wall of the stator core (205); the positions of the stator base pin hole (2061), the stator upper bearing seat pin hole (2021) and the stator core pin hole (2051) match each other, so as to perform circumferential positioning of the stator base (206), the stator upper bearing seat (202) and the stator core (205) through a cylindrical pin (203).
4. The stator structure of the outer rotor motor according to claim 3, characterized in that: The stator iron core (205) and the stator upper bearing seat (202) are in interference fit, and the stator iron core (205) and the stator base (206) are in interference fit.
5. A motor using the stator structure of the outer rotor motor according to any one of claims 1 to 4, characterized in that: It also includes two bearings (201) and a rotor assembly (1), wherein the two bearings (201) are respectively interference-fitted at two ends of the shaft-shaped stator seat through a stator base bearing position (2063) and a stator upper bearing seat bearing position (2023), and the rotor assembly (1) is rotatably connected to the shaft-shaped stator seat through the two bearings (201).
6. The motor according to claim 5, characterized in that The shaft-shaped stator seat is provided with a through hole, and the through hole is coaxially arranged with a stator base bearing position (2063) and a stator upper bearing seat bearing position (2023). The rotor assembly (1) comprises a rotor main shaft (101), a rotor top cover (102), a rotor yoke (105) and a plurality of permanent magnets (103). The rotor main shaft (101) passes through a bearing (201), the through hole and another bearing (201) in sequence, and is connected to two bearings (201). The rotor top cover (102) is sleeved and fixedly connected to one end of the rotor main shaft (101). The rotor yoke (105) is sleeved outside the stator core (205), and one end of the rotor yoke (105) is fixedly connected to the rotor top cover (102). The permanent magnets (103) are sequentially connected to the inner wall of the rotor yoke (105).
7. The motor according to claim 6, characterized in that The rotor top cover (102) is interference fit with the rotor main shaft (101).
8. The motor according to claim 6, characterized in that The rotor top cover (102) is interference-fitted with one end of the rotor yoke (105), and the rotor top cover (102) and the rotor yoke (105) are fixedly connected by screws (104).
9. The motor according to claim 6, characterized in that A flat gasket (207) and a shaft clamp (208) are sleeved on one end of the rotor main shaft (101) away from the rotor top cover (102) so as to ensure a tight connection between the rotor main shaft (101) and the bearing (201).