A zero-slot brushless motor stator
By designing a brushless motor stator with zero-coated structure, the power loss caused by the core eddy current is eliminated, and the output power and assembly efficiency of the motor are improved.
Patent Information
- Application Number
- CN202421499167.2
- 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
The cogging structure of the existing brushless motor stator causes the iron core to form eddy current, causing electrical energy loss and reducing the output power of the motor.
A zero-coated brushless motor stator is designed. The inner peripheral wall of the stator core is smooth and the wire-covered winding ring is not wound on the tooth, and the wire-covered winding ring and the stator core are fixed by casting epoxy resin.
It effectively eliminates the power loss caused by the eddy current of the iron core, improves the output power of the brushless motor, and improves the assembly efficiency and structural stability.
Smart Images
Figure CN222750207U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of motor technology, and in particular to a zero-slot brushless motor stator. Background Art
[0002] Brushless motors are widely used due to their advantages of no brushes, low interference, smooth operation, low noise, long life, and low maintenance cost. The stator of an existing brushless motor is generally a hollow cylindrical structure, with a number of winding rods extending inwardly arranged on its inner wall, and the space between two adjacent winding rods forms a winding slot, thereby forming a tooth slot in the internal space of the stator. The existence of the tooth slot will cause eddy currents to form in the iron core when the motor is working, thereby causing partial loss of electric energy, thereby reducing the output power of the motor, and therefore further improvement is needed. Utility Model Content
[0003] In order to improve the output power of a brushless motor, the present application provides a zero-slot brushless motor stator.
[0004] The present application provides a zero-slot brushless motor stator adopts the following technical solution:
[0005] A zero-slot brushless motor stator comprises a casing having an inner cavity, a stator core having an inner cavity and fixedly inserted in the inner cavity of the casing, and a wire-wrapped winding ring body fixedly inserted in the inner cavity of the stator core, wherein the stator core and the casing are fixed by interference fit or by gluing, and the wire-wrapped winding ring body and the stator core are fixed by pouring epoxy resin.
[0006] By adopting the above technical solution, when assembling the motor stator, the stator core is first installed into the casing, and then the coil winding ring is installed into the stator core and poured with epoxy resin to fix it, which effectively improves the assembly efficiency. In addition, the inner circumferential wall of the stator core is smooth and has no tooth slots, and the coil winding is not wound on the tooth slots, which effectively eliminates the power loss caused by eddy currents formed in the core and improves the output power of the brushless motor.
[0007] Preferably, the inner circumferential wall of the wire wrap winding ring body is provided with an insulating layer.
[0008] By adopting the above technical solution, an insulating layer is additionally provided on the inner peripheral wall of the wire-wrapped winding ring body, thereby improving the insulation effect of the wire-wrapped winding ring body.
[0009] Preferably, an inner peripheral wall at one end of the housing has a limiting protrusion, and an end surface of the stator core abuts against the limiting protrusion.
[0010] By adopting the above technical solution, when assembling the motor stator, the end surface of the stator core is brought into contact with the limiting protrusion, thereby achieving positioning and installation of the stator core, and effectively improving assembly efficiency.
[0011] Preferably, a limiting ring is fixedly connected to the inner peripheral wall of one end of the casing, the limiting ring forms a limiting convex portion, and the end face of the stator core abuts against the end face of the limiting ring.
[0012] By adopting the above technical solution, the limiting ring is fixed to the inner wall of the casing, thereby forming a limiting convex portion, so that the end face of the stator core is fitted and abutted against the end face of the limiting ring.
[0013] Preferably, an inner circumferential wall at one end of the casing is fixedly connected to a mounting ring plate, the mounting ring plate is provided with a threaded hole along the axial direction, a plurality of threaded holes are provided and distributed around the axis of the mounting ring plate, the mounting ring plate is provided with a limiting bolt threadedly passed through the threaded hole, the threaded end of the limiting bolt forms a limiting protrusion, and the end face of the stator core abuts against the threaded end face of the limiting bolt.
[0014] By adopting the above technical solution, the feed amount of the limiting bolt is adjusted by rotating the limiting bolt, thereby adjusting the installation position of the stator core.
[0015] Preferably, an inner peripheral wall at one end of the housing is axially slidably connected with a movable ring, the movable ring forms a limiting protrusion, and an adjusting member for adjusting the sliding position of the movable ring is provided between the movable ring and the housing.
[0016] By adopting the above technical solution, the sliding position of the movable ring is adjusted by the adjusting member, thereby adjusting the installation position of the stator core.
[0017] Preferably, an anti-slip ring is detachably connected to one end of the casing away from the limiting protrusion, and the anti-slip ring abuts against the end surface of the stator core.
[0018] By adopting the above technical solution, the stator core is slidably inserted into the casing so that the end face of the stator core abuts against the limiting protrusion, and then the anti-slip ring is installed on the casing so that the anti-slip ring abuts against the other end of the stator core, thereby improving the structural stability of the stator core.
[0019] Preferably, the anti-slip ring sleeve includes a plug-in ring sleeve inserted in the inner cavity of the casing and a fixed ring plate coaxially fixed on the outer peripheral wall of the plug-in ring sleeve, the end face of the plug-in ring sleeve abuts against the end face of the stator core, and the fixed ring plate is provided with a fixing bolt threadedly connected to the end face of the casing.
[0020] By adopting the above technical solution, the anti-drop ring sleeve and the casing are detachably connected through the fixing bolts.
[0021] In summary, the utility model has the following beneficial effects:
[0022] 1. When assembling the motor stator, first install the stator core into the housing, then install the wire winding ring into the stator core and fix it with epoxy resin, which effectively improves the assembly efficiency. In addition, the inner wall of the stator core is smooth and has no tooth slots, and the wire winding is not wound on the tooth slots, which effectively eliminates the power loss caused by eddy currents formed in the core and improves the output power of the brushless motor;
[0023] 2. Slidingly insert the stator core into the casing so that the end surface of the stator core abuts against the limiting protrusion, and then install the anti-slip ring sleeve into the casing so that the anti-slip ring sleeve abuts against the other end of the stator core to improve the structural stability of the stator core. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 It is a schematic diagram of the overall structure of a zero-slot brushless motor stator in Example 1;
[0025] Figure 2 is a schematic diagram of the connection structure between the stator core and the housing in Example 2;
[0026] Figure 3 is a schematic structural diagram of the anti-drop ring in Example 3;
[0027] Figure 4 is a schematic diagram of the connection structure between the stator core and the housing in Example 4;
[0028] Figure 5 It is a schematic diagram of the connection structure between the stator core and the casing in Example 5.
[0029] In the figure, 1, casing; 11, flange ring plate; 12, limiting ring; 121, positioning column; 13, mounting ring plate; 14, limiting bolt; 15, movable ring; 16, slide groove; 17, slider; 18, limiting hole; 19, adjusting bolt; 2, stator core; 21, positioning hole; 3, wire winding ring body; 31, insulating layer; 4, anti-slip ring sleeve; 41, plug-in ring sleeve; 42, fixing ring plate; 43, fixing bolt. DETAILED DESCRIPTION
[0030] The following is combined with Figure 1-5 This application is described in further detail.
[0031] Embodiment 1:
[0032] The present application embodiment discloses a zero-slot brushless motor stator, referring to Figure 1, including a casing 1, a stator core 2 and a coil winding ring body 3. In this embodiment, the casing 1 and the stator core 2 are both cylindrical, so that the casing 1 and the stator core 2 both have an inner cavity. The stator core 2 is coaxially inserted into the inner cavity of the casing 1. The stator core 2 and the casing 1 are fixed by interference fit or by gluing. In this embodiment, the stator core 2 and the casing 1 are fixed by gluing. The coil winding ring body 3 is coaxially inserted into the inner cavity of the stator core 2. In this embodiment, the coil winding ring body 3 and the stator core 2 are temporarily fixed by glue. Both ends of the coil winding ring body 3 protrude from the end face of the stator core 2, and both ends of the coil winding ring body 3 are retracted from the end face of the casing 1.
[0033] Both ends of the casing 1 are coaxially fixedly connected with flange ring disks 11, and the inner peripheral wall of one end of the casing 1 protrudes with a limiting convex portion, and the end face of the stator core 2 abuts against the limiting convex portion. In this embodiment, a limiting ring 12 is coaxially fixed to the inner peripheral wall of the upper end of the casing 1, and the limiting ring 12 and the casing 1 are fixed as a whole, and the upper end face of the limiting ring 12 is flush with the upper end face of the casing 1. The limiting ring 12 forms a limiting convex portion, and the end face of the stator core 2 abuts against the end face of the limiting ring 12.
[0034] Epoxy resin is poured in the area enclosed by the end face of the stator core 2, the end face of the coil winding ring body 3 and the inner circumferential wall of the limiting ring 12 to fix the coil winding ring body 3, the stator core 2 and the casing 1. In addition, the inner circumferential wall of the coil winding ring body 3 is provided with an insulating layer 31, which is an epoxy resin layer.
[0035] The implementation principle of a zero-slot brushless motor stator in an embodiment of the present application is as follows: the inner circumferential wall of the stator core 2 is smooth and has no slots, and the coil winding ring body 3 is not wound on the slots, which effectively eliminates the power loss caused by eddy currents formed in the core and improves the output power of the brushless motor.
[0036] The assembly steps of the zero-slot brushless motor stator are as follows: multiple groups of three-phase coils are made through a winding die, and a single group of three-phase coils is bundled with cotton thread, and multiple groups of three-phase coils are electrically connected; multiple groups of three-phase coils are sequentially inlaid on the circular core shaft according to the winding distribution diagram, and are wrapped with insulating tape to form a wire winding ring body 3, and then fixed with a throat clamp; after removing the throat clamp, the wire winding ring body 3 is shaped by a shaping tool; after shaping, the circular core shaft is removed, and the stator core 2 is installed into the housing 1, so that the end face of the stator core 2 abuts against the limit ring 12 The end face of the wire wrapped winding ring body 3 is inserted into the inner cavity of the stator core 2, and a casting tire is coaxially inserted into the wire wrapped winding ring body 3. Epoxy resin is poured in the area enclosed by the end face of the stator core 2, the end face of the wire wrapped winding ring body 3 and the inner circumferential wall of the limiting ring 12, and between the outer circumferential wall of the casting tire and the inner circumferential wall of the wire wrapped winding ring body 3. The wire wrapped winding ring body 3, the stator core 2 and the casing 1 are fixed by the epoxy resin, and an insulating layer 31 is formed between the inner circumferential walls of the wire wrapped winding ring body 3. After the pouring is completed, the casting tire is removed.
[0037] Embodiment 2:
[0038] The difference from Example 1 is that, referring to Figure 2 The lower end surface of the limiting ring 12 is protrudingly provided with a positioning column 121, and the upper end surface of the stator core 2 is provided with a positioning hole 21 for inserting the positioning column 121. When the end surface of the stator core 2 abuts against the end surface of the limiting ring 12 and the positioning column 121 is inserted into the positioning hole 21, the stator core 2 and the casing 1 are positioned and installed.
[0039] Embodiment 3:
[0040] The difference from Example 1 is that, referring to Figure 3 The casing 1 is detachably connected to a lower end thereof with an anti-slip ring sleeve 4, which includes a plug-in ring sleeve 41 coaxially inserted into the inner cavity of the casing 1 and a fixing ring plate 42 coaxially fixedly sleeved on the outer peripheral wall of the plug-in ring sleeve 41. The end face of the plug-in ring sleeve 41 abuts against the end face of the stator core 2, and the upper end face of the fixing ring plate 42 abuts against the lower end face of the casing 1. The fixing ring plate 42 is provided with a fixing bolt 43 threadedly connected to the end face of the casing 1.
[0041] The stator core 2 is slidably inserted into the casing 1 so that the end face of the stator core 2 abuts against the end face of the limiting ring 12, and then the anti-slip ring sleeve 4 is installed on the casing 1 so that the anti-slip ring sleeve 4 abuts against the other end of the stator core 2 to improve the structural stability of the stator core 2.
[0042] Embodiment 4:
[0043] The difference from Example 1 is that, referring to Figure 4The upper inner peripheral wall of the housing 1 is coaxially fixedly connected with a mounting ring plate 13, the mounting ring plate 13 is provided with a threaded hole along the axial direction, a plurality of threaded holes are provided and distributed around the axis of the mounting ring plate 13, the mounting ring plate 13 is provided with a limit bolt 14 threadedly penetrated in the threaded hole, the threaded end of the limit bolt 14 forms a limit convex portion, and the end face of the stator core 2 abuts against the threaded end face of the limit bolt 14. By rotating the limit bolt 14, the feed amount of the limit bolt 14 is adjusted, thereby adjusting the installation position of the stator core 2.
[0044] Embodiment 5:
[0045] The difference from Example 1 is that, referring to Figure 5 , the upper inner peripheral wall of the housing 1 is slidably connected with a movable ring 15 in the axial direction, and the movable ring 15 forms a limiting convex portion. Specifically, a slide groove 16 is provided in the axial direction of the upper inner peripheral wall of the housing 1, and the notch of the slide groove 16 extends to the upper end surface of the housing 1. The outer peripheral wall of the movable ring 15 is protruding and fixed with a slider 17 that is slidably connected to the slide groove 16. The inner wall of the slide groove 16 is provided with a limiting hole 18 along the radial direction of the housing 1. The limiting holes 18 are provided in multiple numbers and distributed along the length direction of the slide groove 16. An adjusting member for adjusting the sliding position of the movable ring 15 is provided between the movable ring 15 and the housing 1. The adjusting member is an adjusting bolt 19 threadedly penetrated through the movable ring 15 and the slider 17, and the threaded end of the adjusting bolt 19 is inserted into the limiting hole 18 to fix the movable ring 15. A casting hole is vertically penetrated through the upper end surface of the slider 17. After the stator core 2 is installed, epoxy resin is cast into the slide groove 16 at the upper part of the slider 17, and the epoxy resin is filled into the slide groove 16 at the lower part of the slider 17 through the casting hole.
[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A zero-slot brushless motor stator, characterized in that: The invention comprises a casing (1) having an inner cavity, a stator core (2) having an inner cavity and fixedly inserted in the inner cavity of the casing (1), and a wire-wrapped winding ring body (3) fixedly inserted in the inner cavity of the stator core (2), wherein the stator core (2) and the casing (1) are fixed by interference fit or by gluing, and the wire-wrapped winding ring body (3) and the stator core (2) are fixed by pouring epoxy resin.
2. The zero-slot brushless motor stator according to claim 1, characterized in that: The inner peripheral wall of the wire wrap winding ring body (3) is provided with an insulating layer (31).
3. The zero-slot brushless motor stator according to claim 1, characterized in that: An inner peripheral wall at one end of the housing (1) has a limiting protrusion, and an end surface of the stator core (2) abuts against the limiting protrusion.
4. The zero-slot brushless motor stator according to claim 3, characterized in that: The inner peripheral wall at one end of the casing (1) is fixedly connected to a limiting ring (12), the limiting ring (12) forms a limiting convex portion, and the end face of the stator core (2) abuts against the end face of the limiting ring (12).
5. The zero-slot brushless motor stator according to claim 3, characterized in that: A mounting ring plate (13) is fixedly connected to the inner peripheral wall of one end of the housing (1), and a threaded hole is opened in the axial direction of the mounting ring plate (13). A plurality of threaded holes are provided and distributed around the axis of the mounting ring plate (13). The mounting ring plate (13) is provided with a limiting bolt (14) threadedly penetrated through the threaded hole, and a threaded end portion of the limiting bolt (14) forms a limiting convex portion, and an end face of the stator core (2) abuts against the threaded end face of the limiting bolt (14).
6. The zero-slot brushless motor stator according to claim 3, characterized in that: An inner peripheral wall at one end of the housing (1) is axially slidably connected to a movable ring (15), the movable ring (15) forms a limiting convex portion, and an adjusting member for adjusting the sliding position of the movable ring (15) is provided between the movable ring (15) and the housing (1).
7. The zero-slot brushless motor stator according to claim 3, characterized in that: An end of the housing (1) away from the limiting protrusion is detachably connected to an anti-slip ring sleeve (4), and the anti-slip ring sleeve (4) abuts against an end surface of the stator core (2).
8. The zero-slot brushless motor stator according to claim 7, characterized in that: The anti-drop ring sleeve (4) comprises an insert ring sleeve (41) inserted into the inner cavity of the housing (1) and a fixed ring plate (42) coaxially fixedly sleeved on the outer peripheral wall of the insert ring sleeve (41); the end face of the insert ring sleeve (41) abuts against the end face of the stator core (2); and the fixed ring plate (42) is provided with a fixing bolt (43) threadedly connected to the end face of the housing (1).