A slot-in fan motor stator structure, high-efficiency motor and assembly method thereof

Abstract

This invention relates to the field of high-efficiency motor technology, specifically to a slotted fan motor stator structure, a high-efficiency motor, and its assembly method. The stator includes: a positioning cover and an inner cover, the positioning cover and the inner cover being coaxially arranged and detachably connected; multiple placement slots arranged circumferentially and evenly within the inner cover, capable of inserting a stator core; hysteresis holes arranged circumferentially and evenly on the inner cover, the hysteresis holes connecting the inner and outer sides of the inner cover; a flipping assembly on the inner cover, capable of sealing the ends of the placement slots when activated; and a triggering assembly connected to the positioning cover and the inner cover, capable of driving the flipping assembly to seal the circumferentially arranged placement slots at equal intervals, facilitating assembly.

Description

Technical Field

[0001] This invention relates to the field of high-efficiency motor technology, specifically a slot-mounted fan motor stator structure, a high-efficiency motor, and its assembly method. Background Technology

[0002] In traditional motor stator structures, the number of slots inside the motor and the number of stator cores assembled are usually in a fixed one-to-one correspondence, meaning that all slots must be inserted into the stator core. This design means that the same set of stator molds can only correspond to one power specification of motor. When it is necessary to produce motors with different power levels or different performance parameters, stator molds with different numbers of slots must be redesigned and manufactured, resulting in problems such as high mold costs, long production cycles, and complex material management.

[0003] To address the aforementioned issues, some existing technologies have proposed solutions to reduce the number of stator cores. This involves inserting cores only into a portion of the slots around the circumference, leaving the remaining slots empty, thereby altering the motor parameters. However, to prevent incorrect core insertion, error-proofing marks are typically installed, with each mark corresponding to a specific core. When the number of cores needs to be changed or their distribution adjusted, assembly personnel often need to compare each core against the error-proofing marks and make multiple attempts to accurately place each core in its corresponding slot. This process involves a large workload and a long debugging cycle, impacting motor production efficiency and post-assembly utilization. Summary of the Invention

[0004] The purpose of this invention is to provide a slotted fan motor stator structure, a high-efficiency motor, and an assembly method thereof, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A slotted fan motor stator structure, installed inside the motor housing, includes:

[0007] A positioning cover and an inner cover, wherein the positioning cover and the inner cover are coaxially arranged and detachably connected;

[0008] The placement slots are provided in multiple sets and are equidistantly distributed in a circular pattern within the inner cover, and the placement slots can accommodate inserting iron cores.

[0009] Hysteresis holes are equidistantly arranged on the inner cover in a circular pattern, and the hysteresis holes connect the inner and outer sides of the inner cover;

[0010] A flipping component is provided on the inner cover, which can block the end of the placement slot when it is activated;

[0011] A trigger component is connected to the positioning cover and the inner cover. The trigger component can drive the flipping component to move so that the placement slots arranged in a circle are blocked at equal intervals.

[0012] The slotted fan motor stator structure described above: the positioning cover and the inner cover are coaxial with the motor housing, and a side plate is detachably installed on the positioning cover. When the stator core is inserted into the placement slot, the side plate can stop the stator core.

[0013] The slotted fan motor stator structure described above: the flipping assembly includes a deflection stop rotatably installed in the hysteresis hole and an energy storage kit connected to the inner cover. One end of the energy storage kit is provided with a convex shaft, and the other end is rotatably connected to a traction frame. The end of the traction frame away from the energy storage kit is rotatably connected to the deflection stop.

[0014] The slotted fan motor stator structure described above: the energy storage kit includes a hysteresis sleeve connected to the inner cover, a telescopic rod slidably disposed inside the hysteresis sleeve, one end of the telescopic rod being connected to the traction frame, and the other end being connected to the convex shaft;

[0015] The telescopic rod is also provided with a cylindrical spring and an annular part. One end of the cylindrical spring is connected to the annular part, and the other end is connected to the end of the hysteresis sleeve.

[0016] The slotted fan motor stator structure described above: the triggering component includes an annular rotating member rotatably sleeved in the positioning cover. The annular rotating member is provided with multiple sets of protrusions of different lengths. The protrusions are provided with inclined surfaces. The inclined surfaces cooperate with the convex shaft and can drive the convex shaft away from the deflection stop.

[0017] The slotted fan motor stator structure described above: the inner cover is provided with multiple sets of first through holes along its radial direction, and the stator core is provided with second through holes. When the stator core is inserted into the placement slot, the first through holes and the second through holes are connected.

[0018] The slotted fan motor stator structure described above: an impeller is rotatably arranged inside the motor housing, and multiple sets of first air guides and second air guides are equidistantly arranged on the motor housing in a circular pattern. The diameter of the first air guide is larger than the diameter of the second air guide, and the first air guide is tapered.

[0019] The inner cover is provided with multiple sets of flow guides at equal intervals around its circumference. The flow guides are connected to the first through hole and are directly opposite the first air vent.

[0020] A high-efficiency motor includes the aforementioned slot-embedded fan motor stator structure.

[0021] A method for assembling the slot-mounted fan motor stator structure includes the following steps:

[0022] Step 1: According to production needs, control the action of the trigger component so that the flipping component can block the corresponding placement slot inside the inner cover;

[0023] Step 2: Insert the stator core with the windings into the unblocked placement slot;

[0024] Step 3: Install the side panel into the positioning cover and tighten it with bolts;

[0025] Step 4: Install the assembled stator structure into the motor housing.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] 1. The same stator structure can be quickly adapted to the assembly requirements of 18, 12 or 6 stator cores without the need to manufacture multiple sets of molds with different numbers of slots, thereby reducing production costs and warehousing pressure; at the same time, by periodically sealing specific placement slots, it is ensured that the slots with inserted cores are evenly or symmetrically distributed on the circumference, effectively avoiding magnetic field eccentricity and vibration noise caused by missing cores, and maintaining the stability of motor operation.

[0028] 2. It enables on-demand sealing of the placement slots, ensuring that the number of stator cores assembled each time is strictly consistent with the preset specifications. This ensures that each stator module is subjected to uniform force and has small fluctuations in cogging torque when the motor is working. It also prevents sudden torque changes and abnormal noise caused by mismatch or uneven distribution of cores, thereby improving the motor's running stability, assembly consistency, and finished product qualification rate.

[0029] 3. It achieves multi-dimensional and multi-level thermal management inside the motor. Air can not only flow between the stator and rotor and in the outside of the stator, but also effectively penetrate into the inside of the stator core to form a three-dimensional, full-path cooling network. This improves the heat dissipation efficiency, prevents local overheating of the stator core, and ensures that its temperature is maintained within a stable and reasonable range for a long time, thereby enhancing the motor's operational reliability and extending its service life. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the stator structure of a slotted fan motor.

[0031] Figure 2 This is an exploded view of the motor housing and end cover in the stator structure of a slot-mounted fan motor.

[0032] Figure 3 This is a schematic diagram of the planar structure of a slot-mounted fan motor stator.

[0033] Figure 4 for Figure 3 A schematic diagram of the structure at point AA.

[0034] Figure 5 for Figure 4 Enlarged view of the structure at point B.

[0035] Figure 6 for Figure 4 Enlarged view of the structure at point C.

[0036] Figure 7 This is an exploded view of the stator structure of a slot-mounted fan motor.

[0037] Figure 8 This is a schematic diagram of the flipping component in the stator structure of a slotted fan motor.

[0038] Figure 9 This is a schematic diagram of the energy storage kit in the stator structure of a slot-mounted fan motor.

[0039] Figure 10 This is a schematic diagram of the trigger component in the stator structure of a slot-mounted fan motor.

[0040] Figure 11 This is a schematic diagram of the arrangement of one type of stator core in a slotted fan motor stator structure.

[0041] In the diagram: 1. Motor housing; 101. First air vent; 102. Second air vent; 2. Positioning cover; 3. Inner cover; 301. First through hole; 302. Hysteresis hole; 4. Stator core; 401. Second through hole; 5. Side plate; 6. Drainage cover; 7. Deflection stop; 8. Pulling frame; 9. Hysteresis sleeve; 10. Telescopic rod; 1001. Annular part; 11. Cylindrical spring; 12. Convex shaft; 13. Annular rotating part; 14. Protrusion; 1401. Inclined surface; 15. Impeller. Detailed Implementation

[0042] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0043] Please see Figures 1-11 As an embodiment of the present invention, the slotted fan motor stator structure is installed inside the motor housing 1 and includes: a positioning cover 2 and an inner cover 3, a placement slot, a hysteresis hole 302, a flipping component and a triggering component.

[0044] The positioning cover 2 and the inner cover 3 are coaxially arranged and detachably connected. The motor housing 1 has an end cap at the opening and a notch at the end facing the end cap on the inner side of the motor housing 1. The positioning cover 2 has a limiting part that can cooperate with the notch to ensure the axial locking relationship between the positioning cover 2 and the motor housing 1. This prevents the positioning cover 2 from moving relative to the motor housing 1 due to the force on the stator core 4 during motor operation, thereby improving the stability of the stator core 4 within the motor housing 1 and ensuring smooth motor operation.

[0045] Multiple sets of placement slots are arranged in a circumferentially equidistant manner within the inner cover 3. Stator cores 4 can be inserted into the placement slots. The length of the stator core 4 is the same as the length of the placement slot. One end of the placement slot is closed, and the other end is open. When inserting the stator core 4, the stator core 4 is inserted from the open end. When the end of the stator core 4 abuts against the closed end, the end face of the stator core 4 is exactly coplanar with the open end.

[0046] The positioning cover 2 and the inner cover 3 are coaxial with the motor housing 1, and a side plate 5 is detachably installed on the positioning cover 2. When the stator core 4 is inserted into the placement slot, the side plate 5 can stop the stator core 4.

[0047] When the stator core 4 is inserted into the placement slot, the end face of the stator core 4 is exactly coplanar with the open end. At this time, the side plate 5 is connected to the positioning cover 2 by bolts. The side plate 5 can block the stator core 4, ensuring the positional stability of the stator core 4 in the placement slot. This prevents the stator core 4 from moving along the axial direction of the inner cover 3 due to vibration during motor operation, which would cause instability in the stator magnetic field and further improve the stability of motor operation.

[0048] Please see Figure 4 , Figure 6 , Figures 8-9 The hysteresis holes 302 are circumferentially and equidistantly arranged on the inner cover 3, and the hysteresis holes 302 connect the inner and outer sides of the inner cover 3;

[0049] The flipping component is disposed on the inner cover 3, and when the flipping component is activated, it can seal the end of the placement slot;

[0050] The flipping assembly includes a deflection stop 7 rotatably installed in the hysteresis hole 302 and an energy storage kit connected to the inner cover 3. One end of the energy storage kit is provided with a convex shaft 12, and the other end is rotatably connected to a traction frame 8. The end of the traction frame 8 away from the energy storage kit is rotatably connected to the deflection stop 7.

[0051] The energy storage kit includes a hysteresis sleeve 9 connected to the inner cover 3. A telescopic rod 10 is slidably disposed inside the hysteresis sleeve 9. One end of the telescopic rod 10 is connected to the traction frame 8, and the other end is connected to the convex shaft 12.

[0052] The telescopic rod 10 is also provided with a cylindrical spring 11 and an annular portion 1001. One end of the cylindrical spring 11 is connected to the annular portion 1001, and the other end is connected to the end of the hysteresis sleeve 9.

[0053] In the initial state, the cylindrical spring 11 is compressed, so that the cylindrical spring 11 always applies a force to the telescopic rod 10 in the direction of the deflection stop 7. Under the action of the spring force, the telescopic rod 10 pushes the deflection stop 7 through the traction frame 8 connected to it, so that the deflection stop 7 is kept in the folded state - that is, the deflection stop 7 does not block the end of the placement slot facing its opening. At this time, the placement slot is fully open and can normally accommodate and assemble the stator core 4, thereby meeting the assembly requirements of the stator core 4 under normal production conditions.

[0054] When the number of stator cores 4 needs to be changed according to production requirements, such as reducing the number of cores to adjust motor performance parameters, the operator can control the corresponding trigger component to drive the cam shaft 12 corresponding to the placement slot to produce displacement. Under the pulling action of the cam shaft 12, the telescopic rod 10 overcomes the elastic force of the cylindrical spring 11 and drives the pulling frame 8 to move away from the deflection stop 7, and makes the deflection stop 7 rotate. After the deflection stop 7 rotates to a predetermined angle, it flips to the blocking position and closes the end of the corresponding placement slot facing its opening.

[0055] At this time, the placement slot is blocked. During the subsequent insertion of the stator core 4, the stator core 4 will not be able to be inserted into the placement slot. Through this selective blocking mechanism, it is possible to effectively prevent workers from inserting too many or incorrectly positioned core modules due to negligence when assembling the stator core 4, thereby avoiding motor performance degradation caused by the number or distribution of the stator core 4 not meeting the design requirements.

[0056] Based on the above settings, the placement slots can be sealed as needed, ensuring that the number of stator cores 4 assembled each time is strictly consistent with the preset specifications. This ensures that when the motor is working, each stator module is subjected to uniform force, and the cogging torque fluctuates little. It also prevents torque mutations and abnormal noise caused by mismatch or uneven distribution of cores, thereby improving the motor's running stability, assembly consistency, and finished product qualification rate.

[0057] Please see Figures 7-10 The triggering component is connected to the positioning cover 2 and the inner cover 3. The triggering component can drive the flipping component to move so that the placement slots arranged in a circle are blocked at equal intervals.

[0058] The triggering component includes an annular rotating member 13 rotatably sleeved inside the positioning cover 2. The annular rotating member 13 is provided with multiple sets of protrusions 14 of different lengths. The protrusions 14 are provided with inclined surfaces 1401. The inclined surfaces 1401 cooperate with the convex shaft 12 and can drive the convex shaft 12 away from the deflection stop member 7.

[0059] In this embodiment, for ease of understanding, a detailed explanation is given using an example of an inner cover 3 with 18 sets of placement slots. It should be noted that in actual production, the specific number of placement slots can be flexibly adjusted according to actual application requirements; when using 18 sets of placement slots, to ensure the smooth operation of the motor, the preferred number of stator cores 4 is 18, 12, or 6 sets. For ease of explanation, the 18 sets of placement slots are periodically divided into three identical sections along the circumference, each section containing 6 sets of placement slots, and sequentially labeled as the first to sixth placement slots.

[0060] When 18 sets of stator cores 4 need to be configured, the annular rotating part 13 does not need to perform any additional actions, and all deflection stops 7 remain in the folded state. At this time, each set of placement slots can hold one set of stator cores 4. This mode can maximize the magnetic flux density and is suitable for working conditions that require high power output.

[0061] When 12 sets of stator cores 4 need to be configured, the annular rotating part 13 rotates at a specific angle. Driven by the cooperation of the convex shaft 12 and the protrusion 14, the deflection stop 7 in the third and sixth placement slots in each section is switched to the blocking position, while the remaining placement slots remain unobstructed. In this mode, the amount of copper material can be reduced while ensuring sufficient excitation strength, and the internal airflow can be optimized by utilizing the idle slots, thereby improving heat dissipation efficiency.

[0062] When 6 sets of stator cores 4 need to be configured, the annular rotating part 13 rotates again by a specific angle, so that the deflection stop 7 in the second, third, fifth and sixth placement slots in each section is in the blocking position, leaving only the first and fourth placement slots for inserting stator cores 4. Under this configuration, a larger gap is formed between adjacent cores, which significantly reduces the weight of the motor and reduces iron loss and copper loss. It is suitable for light-load operation scenarios with low load and high efficiency requirements.

[0063] Through the above configuration, the same stator structure can quickly adapt to the assembly requirements of 18, 12, or 6 sets of stator cores 4, eliminating the need to manufacture multiple sets of molds with different slot numbers, thereby reducing production costs and warehousing pressure. Simultaneously, by periodically sealing specific placement slots, the slots containing the cores are ensured to be evenly or symmetrically distributed circumferentially, effectively preventing magnetic field eccentricity and vibration noise caused by missing cores, and maintaining the smooth operation of the motor. Furthermore, unused empty placement slots structurally form additional airflow channels, enhancing the convective heat transfer coefficient on the surface of the stator core 4, effectively reducing motor temperature rise without the need for additional heat dissipation components. This allows for flexible switching of power levels according to different load requirements, achieving the optimal balance between energy efficiency and power output.

[0064] Please see Figure 4 , Figure 7 The slotted fan motor stator structure further includes:

[0065] The inner cover 3 is provided with a plurality of first through holes 301 along its radial direction, and the stator core 4 is provided with a second through hole 401. When the stator core 4 is inserted into the placement slot, the first through hole 301 and the second through hole 401 are connected.

[0066] An impeller 15 is rotatably mounted inside the motor housing 1. The impeller 15 can be connected to the rotor shaft via a spline shaft. Multiple sets of first air guide ports 101 and second air guide ports 102 are circumferentially and equidistantly arranged on the motor housing 1. The diameter of the first air guide port 101 is larger than the diameter of the second air guide port 102, and the first air guide port 101 is tapered.

[0067] The inner cover 3 is provided with multiple sets of flow guide covers 6 at equal intervals around the circumference. The flow guide covers 6 are connected to the first through hole 301 and are directly opposite the first air guide 101.

[0068] In this embodiment, when the motor is in operation, the rotor drives the impeller 15 to rotate at high speed through the spline shaft, thereby continuously drawing air from the rear of the motor and pumping it into the motor to form an effective forced convection cooling cycle. This cooling airflow is mainly used to cool the stator winding, rotor winding and related heat source components to ensure that the motor maintains a suitable temperature environment during long-term operation.

[0069] Specifically, the air drawn by the impeller 15 enters the motor through the first air guide 101 and the second air guide 102. The air entering through the first air guide 101 flows along the outer surface of the inner cover 3, mainly undertaking the task of heat exchange between the external structure of the stator and the heat transferred to the inner cover 3. The air entering through the second air guide 102 flows through the annular gap between the stator and the rotor, directly acting on the high-temperature areas of the stator winding and the rotor winding. Thus, the airflow generated by the impeller 15 is reasonably divided into two independent flow paths, achieving simultaneous cooling of different areas inside the motor, significantly improving the overall heat dissipation efficiency and avoiding local heat accumulation.

[0070] Furthermore, the diameter of the first air guide 101 is larger than that of the second air guide 102, so the airflow entering the first air guide 101 is higher than that entering the second air guide 102. At the same time, the first air guide 101 adopts a constricted structure design, which increases the airflow velocity when it flows through the port, thereby forming a high-speed airflow in the area of ​​the shroud 6. Due to the difference in airflow velocity between the inner and outer sides of the integral structure composed of the inner cover 3 and the stator core 4, a stable static pressure difference is generated. Driven by this static pressure difference, the airflow on the inner and outer sides of the integral structure composed of the inner cover 3 and the stator core 4 can be effectively introduced into the first through hole 301 and the second through hole 401, that is, through the internal channel of the stator core 4. This allows the cooling air to not only cover the outside of the stator and the gap between the stator and rotor, but also to penetrate deep into the interior of the stator core 4 for heat exchange, thereby removing the core heat that is difficult to reach by traditional cooling paths, significantly enhancing the cooling depth and uniformity of the stator core 4.

[0071] Based on the above settings, multi-dimensional and multi-level thermal management of the motor is achieved. Air can not only flow between the stator and rotor and in conventional areas such as outside the stator, but also effectively penetrate into the interior of the stator core 4, forming a three-dimensional, full-path cooling network. This improves the heat dissipation efficiency, prevents local overheating of the stator core 4, and ensures that its temperature is maintained within a stable and reasonable range for a long time, thereby enhancing the motor's operational reliability and extending its service life.

[0072] As an embodiment of the present invention, a high-efficiency motor is also proposed, including the aforementioned slotted fan motor stator structure.

[0073] As another embodiment of the present invention, a method for assembling the slotted fan motor stator structure is also provided, comprising the following steps:

[0074] Step 1: According to production needs, control the action of the trigger component so that the flipping component can block the corresponding placement slot inside the inner cover;

[0075] Step 2: Insert the stator core with the windings into the unblocked placement slot;

[0076] Step 3: Install the side panel into the positioning cover and tighten it with bolts;

[0077] Step 4: Install the assembled stator structure into the motor housing.

[0078] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0079] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A slot-mounted fan motor stator structure, installed inside the motor housing, characterized in that, include: A positioning cover and an inner cover, wherein the positioning cover and the inner cover are coaxially arranged and detachably connected; The placement slots are provided in multiple sets and are equidistantly distributed in a circular pattern within the inner cover, and the placement slots can accommodate inserting iron cores. Hysteresis holes are equidistantly arranged on the inner cover in a circular pattern, and the hysteresis holes connect the inner and outer sides of the inner cover; A flipping component is provided on the inner cover, which can block the end of the placement slot when it is activated; A trigger component is connected to the positioning cover and the inner cover. The trigger component can drive the flipping component to move so that the placement slots arranged in a circle are blocked at equal intervals. The flipping assembly includes a deflection stop rotatably installed in the hysteresis hole and an energy storage kit connected to the inner cover. One end of the energy storage kit is provided with a convex shaft, and the other end is rotatably connected to a traction frame. The end of the traction frame away from the energy storage kit is rotatably connected to the deflection stop. The energy storage kit includes a hysteresis sleeve connected to the inner cover, and a telescopic rod is slidably disposed inside the hysteresis sleeve. One end of the telescopic rod is connected to the traction frame, and the other end is connected to the convex shaft. The telescopic rod is also provided with a cylindrical spring and an annular part. One end of the cylindrical spring is connected to the annular part, and the other end is connected to the end of the hysteresis sleeve. The triggering component includes an annular rotating member rotatably fitted inside the positioning cover. The annular rotating member is provided with multiple sets of protrusions of different lengths. The protrusions are provided with inclined surfaces. The inclined surfaces cooperate with the convex shaft and can drive the convex shaft away from the deflection stop.

2. The slot-mounted fan motor stator structure according to claim 1, characterized in that, The positioning cover and the inner cover are coaxial with the motor housing, and a side plate is detachably installed on the positioning cover. When the stator core is inserted into the placement slot, the side plate can stop the stator core.

3. The slot-mounted fan motor stator structure according to claim 1, characterized in that, The inner cover is provided with multiple sets of first through holes along its radial direction, and the stator core is provided with second through holes. When the stator core is inserted into the placement slot, the first through holes and the second through holes are connected.

4. The slot-mounted fan motor stator structure according to claim 3, characterized in that, An impeller is rotatably mounted inside the motor housing, and multiple sets of first air guides and second air guides are equidistantly arranged on the motor housing in a circular pattern. The diameter of the first air guide is larger than the diameter of the second air guide, and the first air guide is constricted. The inner cover is provided with multiple sets of flow guides at equal intervals around its circumference. The flow guides are connected to the first through hole and are directly opposite the first air vent.

5. A high-efficiency motor, characterized in that, Including the slotted fan motor stator structure as described in any one of claims 1 to 4.

6. A method for assembling the slot-mounted fan motor stator structure as described in claim 2, characterized in that, Includes the following steps: Step 1: According to production needs, control the action of the trigger component so that the flipping component can block the corresponding placement slot inside the inner cover; Step 2: Insert the stator core with the windings into the unblocked placement slot; Step 3: Install the side panel into the positioning cover and tighten it with bolts; Step 4: Install the assembled stator structure into the motor housing.

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