External rotor motor
By designing the first shell piece and the stator shaft and forming it with sheet metal, the problems of high cost and poor support stability of the stator shaft and low support stability of the outer rotor motor are solved, and the effect of reducing costs and improving stability is achieved.
Patent Information
- Application Number
- CN202323671228.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-30
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2033-12-30
AI Technical Summary
The stator shaft seat and the first shell end wall of the existing ventilation electrical appliances have high cost of forming the stator shaft seat and the first shell end wall. The two bearings of the spindle are installed at both ends of the spindle hole of the stator shaft seat, resulting in poor support stability and large diameter of the stator shaft seat. , the overall motor becomes larger.
By designing the first shell and the stator shaft seat separately, the first shell and the second shell are formed by sheet metal, and the stator shaft seat is firmly connected to the second shell end wall, the first bearing and the second bearing through a connecting piece Installed in the bearing chambers of the first shell end wall and the second shell end wall respectively, the installation structure is simplified, the diameter of the stator shaft seat is reduced, and the bearing clearance is eliminated through elastic gaskets to ensure coaxiality and perpendicularity.
It reduces manufacturing costs, increases the stability of the spindle, simplifies the installation structure, reduces the diameter of the stator shaft seat, and improves the support stability and installation convenience of the overall motor.
Smart Images
Figure CN222147289U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of ventilation electrical appliances, in particular to an outer rotor motor. Background Art
[0002] The ventilation appliances involved in this patent include blowers, fans, exhaust fans and other appliances, which generally include motors and airflow generators (such as blades and impellers). The motor is the core component. The existing motors of this type are divided into inner rotor motors and outer rotor motors. This patent involves outer rotor motors. Outer rotor motors generally include stator components, rotor components, first shell components and second shell components. The stator components include stator shaft seats, a main shaft hole is arranged inside the stator shaft seats, and winding coils are installed outside the stator shaft seats; the rotor components include an annular rotor bracket, a main shaft and a magnetic ring component, the rear part of the main shaft is fixedly arranged in the middle of the rotor bracket, the magnetic ring component is installed on the inner side of the rotor bracket, and the front end of the main shaft passes through the stator shaft seat from the main shaft hole; the first shell component includes a first shell end wall constituting the front end face of the motor, the stator shaft seat is integrally formed on the inner side of the first shell end wall, the second shell component includes a second shell end wall constituting the rear end face of the motor, the bearings of the main shaft are installed at both ends of the main shaft hole of the stator shaft seat, and the first shell component and the second shell component are joined.
[0003] The above outer rotor motor has high cost because the stator shaft seat and the first shell end wall are integrally formed, and the two bearings of the main shaft are installed at both ends of the main shaft hole of the stator shaft seat, which has poor support stability for the main shaft and causes the stator shaft seat to have a large diameter, thereby enlarging the overall body of the motor. Utility Model Content
[0004] The main purpose of the utility model is to overcome the problems that the stator shaft seat and the first shell end wall of the existing ventilation type electrical outer rotor motor are integrally formed at high costs, the two bearings of the main shaft are installed at both ends of the main shaft hole of the stator shaft seat, the supporting stability of the main shaft is poor, and the stator shaft seat diameter is large, resulting in the overall size of the motor becoming larger. The problem is solved by designing the first shell member and the stator shaft seat separately, the first shell member and the second shell member are formed by sheet metal, the stator shaft seat is fixedly connected to the second shell end wall by a connecting member, the first bearing is installed in the middle of the first shell end wall, and the second bearing is installed in the middle of the second shell end wall.
[0005] The technical solution adopted by this patent is as follows:
[0006] An outer rotor motor comprises: a first shell, a second shell, a stator component, and a rotor component; the first shell is formed by a sheet metal process, has a first shell end wall, and a first bearing chamber is integrally formed in the middle of the inner side; the second shell is formed by a sheet metal process, has a second shell end wall, and a second bearing chamber is integrally formed in the middle of the inner side; the stator component comprises a stator shaft seat and a winding coil arranged on the stator shaft seat, a spindle channel is provided inside the stator shaft seat, and a spindle seat mounting portion is provided at the outer end; the rotor component comprises a rotor bracket, a spindle and a magnetic ring component, the magnetic ring component is installed on the rotor bracket, and the spindle is fixedly arranged on the rotor bracket; the spindle is installed in the spindle channel and assembled with the first bearing chamber and the second bearing chamber through the first bearing and the second bearing respectively, and the spindle seat mounting portion is fixedly connected to the inner side of the second shell end wall through a connecting piece; the first bearing chamber and / or the second bearing chamber are provided with an axial hole, the output end of the spindle passes through the axial hole, and the first shell and the second shell are joined to form a space for accommodating the stator component and the rotor component.
[0007] Through the split design of the first shell component and the stator shaft seat, the first shell component and the second shell component are formed by sheet metal, and the stator shaft seat is fixedly connected to the second shell end wall by the first connecting member, thereby reducing the manufacturing cost, increasing the span of the first bearing and the second bearing, and the first bearing is connected to the rear end of the main shaft, thereby increasing the stability of the main shaft; the first bearing and the second bearing are respectively installed in the first bearing chamber and the second bearing chamber of the first shell end wall and the second shell end wall, thereby simplifying the installation structure and reducing the diameter of the stator shaft seat.
[0008] Furthermore, the stator shaft seat is provided with a positioning convex edge which cooperates with the second bearing chamber. The above positioning structure is adopted to facilitate installation, and can ensure the coaxiality of the stator shaft seat and the second bearing chamber, and further ensure the coaxiality of the second bearing and the main shaft.
[0009] Furthermore, the second shell end wall is provided with a plurality of first connection holes along the outer periphery of the second bearing housing, and the shaft seat mounting portion is provided with a plurality of second connection holes, and screws pass through the first connection holes and are screwed with the corresponding second connection holes to fix the shaft seat mounting portion to the second shell end wall. With the above structure, screw connection holes are processed on the shaft seat mounting portion, simplifying the connection structure.
[0010] Furthermore, the second housing end wall is provided with an assembly platform around the outer wall of the second bearing chamber, the assembly platform is provided with the first connecting hole, and the shaft seat mounting part is installed on the assembly platform. The above solution ensures the verticality of the stator shaft seat and the main shaft.
[0011] Furthermore, an elastic gasket is provided between the first bearing chamber and the first bearing, or an elastic gasket is provided between the second bearing chamber and the second bearing. The elastic gasket plays a role in eliminating the axial clearance between the first bearing and the first bearing chamber or between the second bearing chamber and the second bearing.
[0012] Furthermore, the stator shaft seat is formed by metal die-casting, and has high structural strength and good rigidity.
[0013] Alternatively, the stator shaft seat is injection molded.
[0014] Instead, the stator shaft seat is machined from metal.
[0015] Furthermore, the first shell component has a first connecting peripheral wall formed by bending from the edge of the first shell end wall, and the second shell component has a second connecting peripheral wall formed by bending from the edge of the second shell end wall. The first connecting peripheral wall and the second connecting peripheral wall are relatively joined and connected via a third connecting member.
[0016] Alternatively, the second shell member is formed by bending the second connecting peripheral wall from the edge of the second shell end wall, and the first shell member and the second connecting peripheral wall are connected by a connecting member.
[0017] The second bearing chamber is arranged at a position where the stator shaft seat is outside the winding coil. By adopting the above scheme, the diameter of the part where the stator shaft seat is installed with the winding coil can be small, thereby reducing the overall outer diameter of the winding coil. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 A three-dimensional schematic diagram of the patented external rotor motor
[0019] Figure 2 This is a three-dimensional cross-sectional view of the patented external rotor motor
[0020] Figure 3 A three-dimensional schematic diagram of the patented external rotor motor from another angle
[0021] Figure 4 This is the front cross-sectional view of the patented external rotor motor
[0022] Figure 5 Exploded view of the patented external rotor motor
[0023] Figure 6 A three-dimensional schematic diagram of the stator shaft seat
[0024] Figure 7 A three-dimensional schematic diagram of the stator shaft seat and the second shell
[0025] Figure 8 Exploded view of the stator shaft seat and the second shell DETAILED DESCRIPTION
[0026] See also Figures 1 to 8The outer rotor motor involved in this patent includes: a first shell 1, a second shell 2, a stator component 3, and a rotor component 4; the first shell 1 is formed by a sheet metal process, and has a first shell end wall 1.1, and a first bearing chamber 10 is integrally formed in the middle of the inner side; the second shell 2 is formed by a sheet metal process, and has a second shell end wall 2.1, and a second bearing chamber 20 is integrally formed in the middle of the inner side; the stator component 3 includes a stator shaft seat 3.1 and a winding coil 3.2 arranged on the stator shaft seat 3.1, and a main shaft channel 3.10 is provided inside the stator shaft seat 3.1, and a shaft seat mounting portion 3.11 is provided at the outer end; the rotor component 4 includes a rotor bracket 4.1, a main shaft 4.2 and a magnetic ring component 4.3, the magnetic ring component 4.3 is installed on the rotor bracket 4.1, and the main shaft 4.2 is fixedly installed on the rotor bracket 4.1; the main shaft 4.1 is installed in the main shaft channel 3.10 and is assembled with the first bearing chamber 10 and the second bearing chamber 20 through the first bearing b1 and the second bearing b2 respectively, and the shaft seat mounting part 3.11 is fixedly connected to the inner side of the second shell end wall 2.1 through the first connecting member t1; the first bearing chamber 10 is provided with an axial hole 100, and the output end of the main shaft 4.2 passes through the axial hole 100, and the first shell 1 and the second shell 2 are combined to form a space for accommodating the stator component 3 and the rotor component 4. Specifically, the axial hole 100 is provided on the end wall of the first bearing chamber 10.
[0027] In other embodiments, the shaft hole 100 is disposed in the second bearing chamber 20. Specifically, the shaft hole 100 is disposed on the end wall of the second bearing chamber 20.
[0028] In other embodiments, both the first bearing chamber 10 and the second bearing chamber 20 are provided with axial holes, and both ends of the main shaft 4.2 are output ends.
[0029] Sheet metal processing such as stretching, or other well-known sheet metal forming methods.
[0030] Specifically, the rotor support 4.1 has a support end wall 4.11 and an annular peripheral wall 4.12, and the magnetic ring component 4.3 is installed inside the annular peripheral wall 4.12. The specific connection can adopt the existing known connection method. The winding coil 3.2 and the stator shaft seat 3.1 are installed by interference fit or other existing known methods.
[0031] A limiting surface 4.110 of the first bearing b1 is provided in the middle of the outer side of the bracket end wall 4.11. The limiting surface 4.110 is used to limit the axial position of the first bearing (b1). One side of the first bearing b1 abuts against the limiting surface 4.110 through a gasket d1. The limiting surface 4.110 on the outer side of the bracket rear wall 4.11 is used to limit the first bearing b1. The structure is simple and the installation is convenient and quick. In other embodiments, one side of the first bearing b1 directly abuts against the limiting surface 4.110.
[0032] The inner positioning of the main shaft 4.2 and the second bearing b2 can be achieved by the retaining spring d2. Of course, the main shaft 4.2 is provided with a retaining groove for installing the retaining spring d2. Of course, a gasket can also be arranged between the retaining spring d2 and the second bearing b2.
[0033] See also Figure 2 and Figure 3 as well as Figure 5 A gasket d3 is arranged between the second bearing b2 and the second bearing chamber 20.
[0034] The connection between the rotor support 4.1 and the main shaft 4.2 is a prior art, the main shaft 4.2 is made of metal material, the rotor support 4 is formed of plastic, and the main shaft 4.2 and the rotor support 4.1 are connected together by injection molding. In other embodiments, the rotor support 4 can be made of metal material, and the main shaft 4.2 and the rotor support 4 are connected together by die casting. Of course, other well-known connection methods can also be used.
[0035] Through the split design of the first shell member 1 and the stator shaft seat 3.1, the first shell member 1 and the second shell member 2 are formed by sheet metal, and the stator shaft seat 3.1 is fixedly connected to the second shell end wall 2.1 by the first connecting member, thereby reducing the manufacturing cost, increasing the span of the first bearing b1 and the second bearing b2, and the first bearing b1 is connected to the rear end of the main shaft 4.1, thereby increasing the stability of the main shaft 4.2; the first bearing b1 and the second bearing b2 are respectively installed in the first bearing chamber 10 and the second bearing chamber 20 of the first shell end wall 1.1 and the second shell end wall 2.1, thereby simplifying the installation structure and reducing the diameter of the stator shaft seat 3.1.
[0036] See also Figure 6 and Figure 2 The stator shaft seat 3.1 is provided with a winding coil mounting shaft portion 3.13 for mounting the winding coil 3.2, and the winding coil 3.2 is mounted on the winding coil mounting shaft portion 3.13.
[0037] See also Figure 2 , Figure 4 and Figure 6 In one embodiment, the stator shaft seat 3.1 is provided with a positioning convex edge 3.12 which is positioned and matched with the second bearing chamber 20. The above positioning structure is adopted to facilitate installation, and can ensure the coaxiality of the stator shaft seat 3.1 and the second bearing chamber 20, and further ensure the coaxiality of the second bearing b2 and the main shaft 4.2.
[0038] See also Figure 2 , Figure 4 , Figures 6 to 8The second housing end wall 2.1 is provided with a plurality of first connection holes 2.10 along the outer periphery of the second bearing chamber 20, and the shaft seat mounting portion 3.11 is provided with a plurality of second connection holes 3.110. The screws t2 pass through the first connection holes 2.10 and are screwed with the corresponding second connection holes 3.110 to fix the shaft seat mounting portion 3.11 to the second housing end wall 2.1. With the above structure, the screw connection holes are processed on the shaft seat mounting portion 3.11, which simplifies the connection structure.
[0039] See also Figures 1 to 4 In one embodiment, the second housing end wall 2.1 is provided with an assembly platform 2.1' around the outer wall of the second bearing chamber 20, the assembly platform 2.1' is provided with the first connecting hole 2.10, and the shaft seat mounting portion 3.11 is mounted on the assembly platform 2.1'. The above solution ensures the verticality of the stator shaft seat 3.1 and the main shaft 4.2.
[0040] See also Figures 1 to 5 In one embodiment, an elastic gasket d is arranged between the end of the first bearing chamber 10 and the first bearing b1, and the elastic gasket d plays a role in eliminating the axial clearance between the first bearing b1 and the first bearing chamber 20. An embodiment of the elastic gasket d is a corrugated gasket, and a gasket d4 is arranged between the elastic gasket d and the first bearing b1. Of course, the elastic gasket d can also be arranged between the second bearing chamber 20 and the second bearing b2 to eliminate the axial clearance between the second bearing chamber 20 and the second bearing b2.
[0041] The stator shaft seat 3.1 is formed by metal die casting, which has high structural strength and good rigidity. As an alternative, in other embodiments, the stator shaft seat 3.1 is formed by injection molding of plastic with high structural strength known in the art. As an alternative, the stator shaft seat 3.1 is formed by metal machining.
[0042] See also Figures 1 to 5 The first shell 1 is formed by bending the edge of the first shell end wall 1.1 to form a first connecting peripheral wall 1.2, and the second shell 2 is formed by bending the edge of the second shell end wall 2.1 to form a second connecting peripheral wall 2.2. The first connecting peripheral wall 1.2 and the second connecting peripheral wall 2.2 are relatively joined and connected by a third second connecting member t3. Specifically, the connecting ends of the first connecting peripheral wall 1.2 and the second connecting peripheral wall 2.2 are provided with flanges (1.21, 2.21), and the connecting holes on the flanges of the two are connected by the second connecting member t3. Since the flanges (1.21, 2.21) are relatively thin, they can be connected by bolts and nuts. Alternatively, in other embodiments (not shown), the second shell 2 is formed by bending the edge of the second shell end wall to form a second connecting peripheral wall, and the first shell and the second connecting peripheral wall are connected by a third connecting member.
[0043] According to the disclosure and teaching of the above description, the technical personnel in the field to which the utility model belongs can also change and modify the above implementation. Therefore, the utility model is not limited to the specific implementation methods disclosed and described above, and some modifications and changes to the utility model should also fall within the scope of protection of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the utility model.
Claims
1. An external rotor motor, characterized in that: include: A first shell component (1) is formed by a sheet metal process and comprises a first shell end wall (1.1), and a first bearing chamber (10) is integrally formed in the middle of the inner side; The second shell component (2) is formed by a sheet metal process and comprises a second shell end wall (2.1), and a second bearing chamber (20) is integrally formed in the middle of the inner side; The stator component (3) comprises a stator shaft seat (3.1) and a winding coil (3.2) arranged on the stator shaft seat (3.1); a main shaft channel (3.10) is provided inside the stator shaft seat (3.1) and a shaft seat mounting portion (3.11) is provided at the outer end; the rotor component (4) comprises a rotor support (4.1), a main shaft (4.2) and a magnetic ring component (4.3); the magnetic ring component (4.3) is mounted on the rotor support (4.1), and the main shaft (4.2) is fixedly arranged on the rotor support (4.1); The main shaft (4.2) is installed in the main shaft channel (3.10) and is assembled with the first bearing chamber (10) and the second bearing chamber (20) respectively through the first bearing (b1) and the second bearing (b2); the shaft seat mounting portion (3.11) is fixedly connected to the inner side of the second shell end wall (2.1) through the first connecting member (t1); the first bearing chamber (10) and / or the second bearing chamber (20) are provided with an axial hole (100); the output end of the main shaft (4.2) passes through the axial hole (100); the first shell member (1) and the second shell member (2) are joined to form a space for accommodating the stator member (3) and the rotor member (4).
2. The outer rotor motor according to claim 1, characterized in that: The stator shaft seat (3.1) is provided with a positioning convex edge (3.12) that is positioned and matched with the second bearing chamber (20).
3. The outer rotor motor according to claim 2, characterized in that: The second shell end wall (2.1) is provided with a plurality of first connection holes (2.10) along the outer periphery of the second bearing chamber (20), the shaft seat mounting portion (3.11) is provided with a plurality of second connection holes (3.110), and screws (t2) pass through the first connection holes (2.10) and are screwed with corresponding second connection holes (3.110) to fix the shaft seat mounting portion (3.11) to the second shell end wall (2.1).
4. The outer rotor motor according to claim 3, characterized in that: The second housing end wall (2.1) is provided with an assembly platform (2.1') around the outer wall of the second bearing chamber (20), the assembly platform (2.1') is provided with the first connecting hole (2.10), and the shaft seat mounting portion (3.11) is mounted on the assembly platform (2.1').
5. The outer rotor motor according to any one of claims 1 to 4, characterized in that: An elastic gasket (d) is provided between the first bearing chamber (10) and the first bearing (b1); or an elastic gasket is provided between the second bearing chamber (20) and the second bearing (b2).
6. The outer rotor motor according to any one of claims 1 to 4, characterized in that: The stator shaft seat (3.1) is formed by metal die-casting; or the stator shaft seat (3.1) is formed by injection molding; or the stator shaft seat (3.1) is formed by metal machining.
7. The outer rotor motor according to any one of claims 1 to 4, characterized in that: A limiting surface (4.110) for limiting the axial position of the first bearing (b1) is provided on the outer side of the end wall of the rotor support (4.1).
8. The outer rotor motor according to any one of claims 1 to 4, characterized in that: The rotor support (4.1) is made of plastic, and the main shaft (4.2) and the rotor support (4.1) are connected by injection molding; Alternatively, the rotor support (4.1) is made of metal, and the main shaft (4.2) and the rotor support (4.1) are connected by die casting.
9. The outer rotor motor according to any one of claims 1 to 4, characterized in that: The first shell component (1) is formed by bending a first connecting peripheral wall (1.2) from the edge of the first shell end wall (1.1), and the second shell component (2) is formed by bending a second connecting peripheral wall (2.2) from the edge of the second shell end wall (2.1). The first connecting peripheral wall (1.2) and the second connecting peripheral wall (2.2) are relatively joined and connected via a second connecting component (t3).
10. The outer rotor motor according to any one of claims 1 to 4, characterized in that: The second shell component (2) is a second connecting peripheral wall (2.2) formed by bending from the edge of the second shell end wall (2.1), and the first shell component (1) and the second connecting peripheral wall (2.2) are connected via a third connecting component.