Waterproof external rotor motor
Through the connection of U-fasteners and lock bolts without drilling, combined with the ring buckle edge and sealing section, the problem of poor waterproof performance of the outer rotor motor case is solved, the structural strength and water tightness are improved, and the underwater environment is enhanced Safety and lifespan in.
Patent Information
- Application Number
- CN202323344805.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-08
- Publication Date
- 2024-12-06
- Estimated Expiration
- 2033-12-08
AI Technical Summary
The poor waterproof performance of the existing outer rotor motor case leads to insufficient structural strength and service life, especially in underwater environments.
The U-shaped fastener and lock bolt connection method are adopted without drilling, combined with the annular buckle edge and sealing section to enhance the structural integrity and watertightness of the housing, and improve assembly accuracy and Sealing.
It improves the structural strength and water tightness of the case, reduces the risk of water corrosion, enhances the safety and life of use in underwater environments, reduces costs, and avoids the trend of stress concentration and centrifugation.
Smart Images
Figure CN222127764U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of motors, and in particular relates to a waterproof outer rotor motor. Background Art
[0002] The outer rotor motor includes a central shaft, a stator assembly and a casing. The stator assembly is assembled in a cavity defined by the casing, and the casing can rotate relative to the stator assembly. The outer rotor motor is widely used in aerators, ship drive engines and other equipment. Since the outer rotor motor is often used in underwater environments, the waterproof performance of its casing is particularly important, which directly affects its use, installation and service life. The existing outer rotor motor casing is usually assembled by two end covers that are snapped together. The outer edges of the two end covers are drilled and connected by bolts. The drilling holes on the end covers will affect the watertightness and structural strength of the casing, and the drilling positions are easily corroded by water, affecting the safety of use and the service life of the outer rotor motor. Summary of the invention
[0003] The utility model aims to solve the problem of poor waterproof performance of the outer rotor motor casing in the prior art and provides a waterproof outer rotor motor. The invention objective of the utility model is achieved through the following technical solutions:
[0004] A waterproof outer rotor motor comprises a casing, a central axis and a stator assembly, wherein the casing comprises a first end cover and a second end cover which are coaxially arranged; the first end cover comprises a first cover body and a first assembly edge formed on the outer edge of the first cover body, and the second end cover comprises a second cover body and a second assembly edge formed on the outer edge of the second cover body; the first cover body and the second cover body are mutually buckled to define an assembly cavity for assembling the stator assembly, and the first assembly edge and the second assembly edge both extend radially outwardly along the casing and fit each other; a plurality of U-shaped fasteners are buckled on the first assembly edge and the second assembly edge, and the U-shaped fasteners comprise a first straight wall and a second straight wall which are parallel to each other, and an accommodating gap for accommodating the first assembly edge and the second assembly edge is provided between the first straight wall and the second straight wall, wherein a through hole is provided on the first straight wall, and the central axis of the through hole is perpendicular to the first assembly edge, and a locking bolt is coaxially assembled in the through hole, and the locking end of the locking bolt abuts against the first assembly edge and provides an abutting force for the first assembly edge to abut against the second assembly edge.
[0005] Preferably, the second assembly edge and the second assembly edge are both annular, and the outer edge of the second assembly edge is formed with an annular buckle edge extending toward the first assembly edge, and the outer edge of the first assembly edge is abutted against the inner wall of the annular buckle edge.
[0006] Preferably, the outer edge of the first assembly edge and the inner wall of the annular buckle edge are both inclined walls, and both inclined walls are gradually retracted inward along the radial direction of the housing.
[0007] Preferably, the first assembly edge has a first abutting wall abutting against the second assembly edge, and the second assembly edge has a second abutting wall abutting against the first assembly edge. The first abutting wall and the second abutting wall are both flat walls. A first annular groove is provided on the first abutting wall, and a second annular groove is provided on the second abutting wall. The first annular groove and the second annular groove are arranged opposite to each other and cooperate to define an annular embedding groove for embedding a sealing ring.
[0008] Preferably, a plurality of the U-shaped fasteners are evenly spaced along the circumference of the casing.
[0009] Preferably, a first bearing chamber for assembling a first bearing is formed in the center of the first end cover, and a second bearing chamber for assembling a second bearing is formed in the center of the second end cover. The first end cover is rotatably assembled on the central axis via the first bearing, and the second end cover is rotatably assembled on the central axis via the second bearing. Both the first bearing chamber and the second bearing chamber are formed inside the assembly cavity.
[0010] Preferably, the central axis is divided into sections along its axial direction, including a first assembly section, a second assembly section, and a sealing section arranged between the first assembly section and the second assembly section. The first end cover, the second end cover and the stator assembly are all assembled in the first assembly section, the second assembly section is equipped with an organic base, and the sealing section is fixedly provided with a sealing assembly.
[0011] Preferably, the machine base includes a flange and a cover shell buckled on the flange, and the cover shell is equipped with an electronic control component; the second assembly section has two parallel cutting flat walls, and the flange cooperates with the cutting flat walls through an assembly set.
[0012] Preferably, a shaft sleeve extending toward the flange is provided in the center of the second end cover, and an assembly space for accommodating a sealing assembly is formed between the shaft sleeve and the outer wall of the sealing section.
[0013] Preferably, an axial through hole for passing the wire is opened inside the central shaft, and the axial through hole passes through the second assembly section and the sealing section of the central shaft and extends to the first assembly section. The first assembly section has a radial through hole connected to the axial through hole.
[0014] Compared with the prior art, the two end covers of the waterproof outer rotor motor disclosed in the utility model are connected by U-shaped fasteners and locking bolts. There is no need to open assembly holes on the two end covers, which ensures the structural integrity of the end covers and improves the structural strength and water tightness of the casing. The setting of the annular buckle edge improves the connection stability of the two end covers, and the annular buckle edge of the second end cover can limit the first end cover in the radial direction, thereby suppressing the centrifugal tendency of the first end cover when the casing runs at high speed. The outer edge of the first assembly edge and the inner wall of the annular buckle edge are both inclined walls, which can increase the matching area between the two and avoid stress concentration. The central axis is segmented and matched with the casing and the base respectively through different outer diameters and outer contours, so the assembly is convenient and compact with high assembly precision. A sealing section for assembling the sealing assembly is provided between the two assembly sections, and a shaft sleeve is formed on the second end cover, and an assembly space for accommodating the sealing assembly is formed between the shaft sleeve and the outer wall of the sealing section, thereby further improving the water tightness of the casing. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the structure of the utility model;
[0016] Figure 2 This is a schematic diagram of the internal structure of the utility model;
[0017] Figure 3 This is a schematic diagram of the first end cover structure in the utility model;
[0018] Figure 4 This is a schematic diagram of the second end cover structure in the utility model;
[0019] Figure 5 This is a schematic diagram of the U-shaped fastener and locking bolt structure in the utility model;
[0020] Figure 6 This is a schematic diagram of the central axis structure of the utility model;
[0021] Markings in the figure: first end cover 10; first cover body 11; first assembly edge 12; first annular groove 13; first bearing chamber 14; second end cover 20; second cover body 21; second assembly edge 22; annular buckle edge 23; second annular groove 24; second bearing chamber 25; sleeve 26; U-shaped fastener 30; first straight wall 31; second straight wall 32; locking bolt 40; flange 51; cover 52; center axis 60; first assembly section 61; second assembly section 62; sealing section 63; axial through hole 64; radial through hole 65; cut flat wall 66; stator assembly 70. DETAILED DESCRIPTION
[0022] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:
[0023] See also Figure 1-Figure 5This embodiment discloses a waterproof outer rotor motor, which is mainly used in underwater environments, such as in an aerator, and includes a housing, a central shaft 60 and a stator assembly 70.
[0024] The housing includes a first end cover 10 and a second end cover 20 which are coaxially arranged; the first end cover 10 includes a first cover body 11 and a first assembly edge 12 formed on the outer edge of the first cover body 11, and the second end cover 20 includes a second cover body 21 and a second assembly edge 22 formed on the outer edge of the second cover body 21; the first cover body 11 and the second cover body 21 are buckled together to define an assembly cavity for assembling the stator assembly 70, and the first assembly edge 12 and the second assembly edge 22 both extend radially outward from the housing and fit together; a plurality of U-shaped The fastener 30, a plurality of U-shaped fasteners 30 are evenly spaced along the circumference of the housing; the U-shaped fastener 30 includes a first straight wall 31 and a second straight wall 32 which are parallel to each other, and there is an accommodation gap between the first straight wall 31 and the second straight wall 32 for accommodating the first assembly edge 12 and the second assembly edge 22, wherein a through hole is provided on the first straight wall 31, and the central axis 60 of the through hole is perpendicular to the first assembly edge 12, and a locking bolt 40 is coaxially installed in the through hole, and the locking end of the locking bolt 40 abuts against the first assembly edge 12, and provides an abutting force for the first assembly edge 12 to abut against the second assembly edge 22. The two end covers are connected by the U-shaped fastener 30 and the locking bolt 40, and there is no need to provide an assembly hole on the two end covers, which ensures the structural integrity of the end covers and improves the structural strength and water tightness of the housing. The U-shaped fastener 30 and the locking bolt 40 can both be made of high-quality anti-corrosion materials, which are lower in cost than optimizing the anti-corrosion performance of the end covers.
[0025] The second assembly edge 22 and the second assembly edge 22 are both annular, and the outer edge of the second assembly edge 22 is formed with an annular buckle edge 23 extending toward the first assembly edge 12, and the outer edge of the first assembly edge 12 is abutted against the inner wall of the annular buckle edge 23. The setting of the annular buckle edge 23 improves the connection stability of the two end covers, and the annular buckle edge 23 of the second end cover 20 can limit the first end cover 10 in the radial direction, thereby suppressing the centrifugal tendency of the first end cover 10 when the casing runs at high speed; in order to avoid stress concentration, the outer edge of the first assembly edge 12 and the inner wall of the annular buckle edge 23 are both inclined walls, and the two inclined walls are gradually retracted inward along the radial direction of the casing to increase the matching area between the two.
[0026] In order to further improve the water tightness of the casing, a sealing ring is further provided between the first end cover 10 and the second end cover 20, the first assembly edge 12 has a first abutting wall abutting against the second assembly edge 22, the second assembly edge 22 has a second abutting wall abutting against the first assembly edge 12, the first abutting wall and the second abutting wall are both flat walls, a first annular groove 13 is provided on the first abutting wall, and a second annular groove 24 is provided on the second abutting wall, the first annular groove 13 and the second annular groove 24 are arranged opposite to each other and cooperate to define an annular embedding groove for embedding the sealing ring, and in this embodiment, two first annular grooves 13 and two second annular grooves 24 are provided to assemble two sealing rings.
[0027] A first bearing chamber 14 for assembling a first bearing is formed in the center of the first end cover 10, and a second bearing chamber 25 for assembling a second bearing is formed in the center of the second end cover 20. The first end cover 10 is rotatably assembled on the central shaft 60 via the first bearing, and the second end cover 20 is rotatably assembled on the central shaft 60 via the second bearing. The first bearing chamber 14 and the second bearing chamber 25 are both formed inside the assembly cavity to improve the sealing performance of the casing.
[0028] See also Figure 6 The central axis 60 is divided into sections along its axial direction, including a first assembly section 61, a second assembly section 62, and a sealing section 63 arranged between the first assembly section 61 and the second assembly section 62. The first end cover 10, the second end cover 20 and the stator assembly 70 are all assembled in the first assembly section 61, the second assembly section 62 is equipped with an organic base, and the sealing section 63 is fixed with a sealing assembly.
[0029] The base includes a flange 51 and a cover 52 buckled on the flange 51, and the cover 52 is equipped with an electronic control component; the second assembly section 62 has two parallel cutting flat walls 66, and the center of the flange 51 is provided with an assembly plate with a center hole, and an assembly set is fixed in the center hole. The assembly set has an embedded hole that is embedded with the second assembly section 62, and the embedded hole has two first plane hole walls that are in contact with the cutting flat wall 66; the assembly set also includes two parallel planar outer walls, and the center hole of the flange 51 has two first plane hole walls that are in contact with the flat wall 66. The second plane hole wall is fitted with the outer wall of the plane, and the plane outer wall and the second plane hole wall are provided with matching limit strips and strip grooves. The flange 51 is assembled in the second assembly section 62 through the assembly set. The outer diameter and outer contour of the second assembly section 62 are adapted to the assembly set, and a cut flat wall 66 is provided to improve the assembly accuracy of the flange 51; a shaft sleeve 26 extending toward the flange 51 is provided in the center of the second end cover 20, and an assembly space for accommodating the sealing assembly is formed between the shaft sleeve 26 and the outer wall of the sealing section 63, which further improves the water tightness of the casing.
[0030] An axial through hole 64 for passing the wire is opened inside the center shaft 60, and the axial through hole 64 passes through the second assembly section 62 and the sealing section 63 of the center shaft 60, and extends to the first assembly section 61. The first assembly section 61 is opened with a radial through hole 65 connected to the axial through hole 64. One end of the wire is connected to the electronic control component in the cover shell 52, and the other end passes through the axial through hole 64 of the center shaft 60, and passes through the radial through hole 65 to be connected to the stator assembly 70. The wires are all routed inside the center shaft 60, further ensuring the integrity and sealing of the casing.
[0031] It should be understood that in the claims and description of the utility model, all "including..." should be understood as open-ended meanings, that is, their meanings are equivalent to "at least including...", and should not be understood as closed-ended meanings, that is, their meanings should not be understood as "only including...". The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.
[0032] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should be covered by the protection scope of the utility model.
Claims
1. A waterproof outer rotor motor, comprising a housing, a central shaft and a stator assembly, characterized in that: The casing includes a first end cover and a second end cover which are coaxially arranged; the first end cover includes a first cover body and a first assembly edge formed on the outer edge of the first cover body, and the second end cover includes a second cover body and a second assembly edge formed on the outer edge of the second cover body; the first cover body and the second cover body are interlocked to define an assembly cavity for assembling the stator assembly, and the first assembly edge and the second assembly edge both extend radially outward from the casing and fit each other; a plurality of U-shaped fasteners are interlocked on the first assembly edge and the second assembly edge, and the U-shaped fasteners include a first straight wall and a second straight wall which are parallel to each other, and an accommodating gap for accommodating the first assembly edge and the second assembly edge is provided between the first straight wall and the second straight wall, wherein a through hole is provided on the first straight wall, and a central axis of the through hole is perpendicular to the first assembly edge, and a locking bolt is coaxially assembled in the through hole, and a locking end of the locking bolt abuts against the first assembly edge and provides an abutting force for the first assembly edge to abut against the second assembly edge.
2. A waterproof outer rotor motor according to claim 1, characterized in that: The second assembly edge and the second assembly edge are both annular, and the outer edge of the second assembly edge is formed with an annular buckle edge extending toward the first assembly edge, and the outer edge of the first assembly edge is abutted against the inner wall of the annular buckle edge.
3. A waterproof outer rotor motor according to claim 2, characterized in that: The outer edge of the first assembly edge and the inner wall of the annular buckle edge are both inclined walls, and the two inclined walls are gradually retracted inward along the radial direction of the housing.
4. A waterproof outer rotor motor according to claim 3, characterized in that: The first assembly edge has a first abutting wall abutting against the second assembly edge, and the second assembly edge has a second abutting wall abutting against the first assembly edge. The first abutting wall and the second abutting wall are both flat walls. A first annular groove is provided on the first abutting wall, and a second annular groove is provided on the second abutting wall. The first annular groove and the second annular groove are arranged opposite to each other and cooperate to define an annular embedding groove for embedding a sealing ring.
5. The waterproof outer rotor motor according to claim 2, characterized in that: A plurality of U-shaped fasteners are evenly spaced along the circumference of the casing.
6. The waterproof outer rotor motor according to claim 1, characterized in that: A first bearing chamber for assembling a first bearing is formed in the center of the first end cover, and a second bearing chamber for assembling a second bearing is formed in the center of the second end cover. The first end cover is rotatably assembled on the central axis via the first bearing, and the second end cover is rotatably assembled on the central axis via the second bearing. Both the first bearing chamber and the second bearing chamber are formed inside the assembly cavity.
7. A waterproof outer rotor motor according to any one of claims 1 to 6, characterized in that: The central axis is divided into sections along its axial direction, including a first assembly section, a second assembly section, and a sealing section arranged between the first assembly section and the second assembly section. The first end cover, the second end cover and the stator assembly are all assembled in the first assembly section. The second assembly section is equipped with an organic base, and the sealing section is fixed with a sealing assembly.
8. The waterproof outer rotor motor according to claim 7, characterized in that: The machine base comprises a flange and a cover shell buckled on the flange, wherein an electric control component is installed in the cover shell; the second assembly section has two mutually parallel cutting flat walls, and the flange cooperates with the cutting flat walls through an assembly set.
9. The waterproof outer rotor motor according to claim 8, characterized in that: A shaft sleeve extending toward the flange is provided at the center of the second end cover, and an assembly space for accommodating a sealing assembly is formed between the shaft sleeve and the outer wall of the sealing section.
10. The waterproof outer rotor motor according to claim 8, characterized in that: An axial through hole for passing wire is provided inside the central shaft, and the axial through hole passes through the second assembly section and the sealing section of the central shaft and extends to the first assembly section. The first assembly section is provided with a radial through hole connected to the axial through hole.