Motor and range hood fan comprising same

Abstract

The utility model discloses a motor and a draught fan used for a range hood and comprising the motor. The motor comprises a stator and an inner rotor iron core, the inner rotor iron core is formed by stacking and connecting a plurality of end portion laminations and middle portion laminations along the axial direction, the inner rotor iron core comprises a shaft hole, a periphery and an end portion, and the end portion forms an inward concave clearance area, a first section shape corresponding to the shaft hole and a second section shape corresponding to the periphery are formed on at least multiple middle section laminations, and a third section shape corresponding to the wall surface of the clearance area and a second section shape corresponding to the periphery are formed on at least one or multiple end part laminations; and the end part laminations are positioned on one side or two sides of the middle section laminations. The height of the motor is reduced, so that the overall height of the motor is reduced, the flow resistance of a fan system is effectively reduced, and the air volume of the fan is increased. Rotational inertia can be effectively reduced, the starting capability of the motor is improved, and the motor can be manufactured by adopting a processing mode which saves more materials.

Description

Technical Field

[0001] The utility model relates to the field of motors and fans for range hoods. Background Art

[0002] Existing motors are widely used in various fields. When applied to some fields, such as the fan of a range hood, different adjustments will be made due to the particularity of the product application. For example, for the range hood field, a flatter fan means a smaller volume and lower internal fluid resistance of the range hood.

[0003] At present, the height of the rotor core used in existing motors, such as an integrated rotor core, is difficult to further reduce, so the overall height of the motor is difficult to further compress, and the integrated rotor core has a low material utilization rate, and a lot of material needs to be removed during processing. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the defects in the prior art that the height of the motor is difficult to reduce and the material utilization rate of the rotor core is low, and to provide a motor and a fan for a range hood including the motor.

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] A motor comprises a stator and an inner rotor core, wherein the inner rotor core is formed by stacking and connecting a plurality of end laminations and middle laminations along an axial direction, wherein the inner rotor core comprises an axial hole, an outer periphery and an end portion, wherein the end portion is formed with an air avoidance region recessed inwardly, wherein at least a plurality of middle laminations are formed with a first segmented shape corresponding to the axial hole and a second segmented shape corresponding to the outer periphery, and at least one or more end laminations are formed with a third segmented shape corresponding to the wall of the air avoidance region and a second segmented shape corresponding to the outer periphery, and the end laminations are located on one side or both sides of the middle laminations.

[0007] In this solution, the use of the air-avoidance area can allow for the accommodation of other structures of the motor, thereby reducing the height of the motor. This reduces the overall height of the motor, effectively reduces the flow resistance of the fan system, and increases the fan air volume. It can also effectively reduce the moment of inertia and increase the motor starting ability. In addition, the inner rotor core is formed by stacking different laminations, which not only makes it easier to stack the shape of the air-avoidance area, but also the thickness of the end laminations and the middle laminations is thinner, and can be manufactured using a more material-saving processing method.

[0008] Preferably, the end laminations have the same third segment shape, and the third segment shapes on one or more end laminations are stacked along the axial direction to form the air-avoiding area with parallel walls. This makes the end laminations more versatile, further allowing the same end laminations to be used or the same equipment to be used to process the same end laminations, thereby reducing the production cost of the end laminations.

[0009] Preferably, the end laminations have different third segment shapes, and the third segment shapes on one or more end laminations are stacked along the axial direction to form the air avoidance area with an inclined wall surface or an arcuate wall surface, thereby allowing the air avoidance area to accommodate various structures to be formed.

[0010] Preferably, the end laminations and the middle laminations have the same second segment shape, and the end laminations and the middle laminations are stacked along the axial direction to form the outer periphery with parallel walls, thereby using the same end laminations and middle laminations, or using the same equipment to process the same end laminations and middle laminations, thereby reducing the production cost of the end laminations and middle laminations.

[0011] Preferably, the inner rotor core includes a plurality of weight-reducing holes, which are exposed in the air-avoiding area, wherein a fourth segmented shape corresponding to the weight-reducing hole is formed on the middle section lamination, and the fourth segmented shapes on the plurality of middle section laminations are stacked along the axial direction to form the weight-reducing hole. The weight-reducing hole can reduce the weight of the inner rotor core.

[0012] Preferably, the end laminations and the middle laminations are formed by stamping, for example, by using a multi-head stamping die. The stamping cost is lower, and the remaining core material is further effectively utilized, thereby increasing the utilization rate of the core material.

[0013] Preferably, the inner rotor core has a circular outer periphery, and the distance between each of the third segmented shapes of each of the end laminations and the axis of the inner rotor core is less than or equal to 75% of the radius of the inner rotor core, thereby ensuring the thickness of the outer peripheral area of ​​the inner rotor core and avoiding the influence on the electromagnetic performance.

[0014] Preferably, the middle section laminations and the end laminations are formed by composite lamination or bonding.

[0015] Preferably, the motor further comprises an end cover, a bearing mounting seat is arranged in the middle area of ​​the end cover, and at least a part of the bearing mounting seat is accommodated in the air-avoiding area, thereby accommodating a part of the bearing mounting seat with a large axial protrusion distance, thereby reducing the space occupied by the height of the bearing mounting seat.

[0016] A fan for a range hood, the fan for a range hood comprising the motor.

[0017] The positive improvement effect of the utility model is that the utility model reduces the height of the motor, so that the overall height of the motor is reduced, effectively reducing the flow resistance of the fan system and increasing the fan air volume. It can also effectively reduce the moment of inertia, increase the motor starting ability, and can be manufactured using a more material-saving processing method. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a motor according to a preferred embodiment of the utility model.

[0019] Figure 2 This is a schematic structural diagram of the inner rotor core of a preferred embodiment of the utility model.

[0020] Figure 3 This is a schematic structural diagram of the end laminations of a preferred embodiment of the utility model.

[0021] Figure 4 It is a schematic structural diagram of the middle section lamination of a preferred embodiment of the utility model.

[0022] Figure 5 This is a schematic diagram of a half-section structure of a motor according to a preferred embodiment of the utility model.

[0023] Figure 6 This is a schematic diagram of the structure of the motor and impeller of a preferred embodiment of the utility model. DETAILED DESCRIPTION

[0024] The present invention is further described below by way of embodiments, but the present invention is not limited to the scope of the embodiments.

[0025] like Figure 1-Figure 6 As shown, this preferred embodiment discloses a motor, including a stator 200 and an inner rotor core 100. The inner rotor core 100 is formed by stacking and connecting a plurality of end laminations 101 and middle laminations 102 along the axial direction, and the inner rotor core 100 includes an axial hole 110, an outer periphery 120 and an end portion, and an inwardly recessed air-avoiding area 130 is formed at the end portion, wherein at least a plurality of middle laminations 102 are formed with a first segmented shape 111 corresponding to the axial hole 110 and a second segmented shape 112 corresponding to the outer periphery 120, and at least one or more end laminations 101 are formed with a third segmented shape 113 corresponding to the wall of the air-avoiding area 130 and a second segmented shape 112 corresponding to the outer periphery 120, and the end laminations 101 are located on one side or both sides of the middle laminations 102.

[0026] Among them, the axial direction refers to the axial direction of the inner rotor core 100 and the motor. The end laminations 101 are arranged on one side or both sides of the axial direction of the middle laminations 102 according to actual needs. For example, when only one side of the air avoidance area 130 is needed, it is only arranged on one side, and when both sides of the air avoidance area 130 are needed, it is arranged on both sides. The number of end laminations 101 and middle laminations 102 can be set according to the actual needs of the inner rotor core 100. Specifically, the number of end laminations 101 can be determined according to the height of the air avoidance area 130, and the number of end laminations 101 and the number of middle laminations 102 determine the total height of the inner rotor core 100. The outer periphery of the inner rotor core 100 can be set to a shape suitable for a known inner rotor core according to actual needs. The inner rotor core 100 can be made of a known material suitable for a known inner rotor core, such as silicon steel and other materials.

[0027] In this embodiment, the use of the air avoidance area 130 can allow for the accommodation of other structures of the motor, thereby reducing the height of the motor. This reduces the overall height of the motor, effectively reduces the flow resistance of the fan system, and increases the air volume of the fan. It can also effectively reduce the moment of inertia and increase the starting ability of the motor. In addition, the inner rotor core 100 is formed by stacking different laminations, which can not only more conveniently stack the shape of the air avoidance area 130, but also the thickness of the end laminations 101 and the middle laminations 102 is thinner, and can be manufactured using a more material-saving processing method.

[0028] like Figure 2 and Figure 3 As shown, in this embodiment, the end laminations 101 preferably have the same third segmented shape 113, and the third segmented shapes 113 on one or more end laminations 101 are stacked along the axial direction to form a structure having the following structure: Figure 2 The parallel wall of the empty area 130. This makes the end stack 101 more versatile, further allowing the same end stack 101 to be used or the same equipment to process the same end stack 101, thereby reducing the production cost of the end stack 101.

[0029] In other embodiments, the end laminate 101 may have different third segment shapes 113, and the third segment shapes 113 on one or more end laminates 101 may be stacked along the axial direction to form a clearance area 130 with an inclined wall surface or an arc-shaped wall surface. This allows the formation of a clearance area 130 that accommodates various structures.

[0030] like Figure 2-Figure 4 As shown, in this embodiment, the end laminations 101 and the middle laminations 102 preferably have the same second segment shape 112, and the end laminations 101 and the middle laminations 102 are stacked along the axial direction to form a second segment shape 112. Figure 2The outer periphery 120 with parallel walls is shown. This allows the same end laminations 101 and middle laminations 102 to be used, or the same equipment to process the same end laminations 101 and middle laminations 102, thereby reducing the production costs of the end laminations 101 and middle laminations 102.

[0031] like Figure 2-Figure 4 As shown, in this embodiment, the inner rotor core 100 preferably includes a plurality of weight-reducing holes 140, and the weight-reducing holes 140 are exposed in the air-avoiding area 130, wherein the middle section laminations 102 are formed with fourth segment shapes 114 corresponding to the weight-reducing holes 140, and the fourth segment shapes 114 on the plurality of middle section laminations 102 are stacked along the axial direction to form the weight-reducing holes 140. The weight-reducing holes 140 can reduce the weight of the inner rotor core 100.

[0032] like Figure 2 and Figure 3 As shown, in this embodiment, the inner rotor core 100 preferably has a circular outer periphery 120, and the distance between each of the third segmented shapes 113 of each end lamination 101 and the axis of the inner rotor core 100 is less than or equal to 75% of the radius of the inner rotor core 100. In this way, the thickness of the outer peripheral area of ​​the inner rotor core 100 is ensured to avoid affecting the electromagnetic performance.

[0033] In this embodiment, the end laminations 101 and the middle laminations 102 are preferably formed by stamping, for example, by using a multi-head stamping die. The cost of stamping is lower, and the remaining core material is further effectively utilized to increase the utilization rate of the core material. In this embodiment, the middle laminations 102 and the end laminations 101 are preferably formed by composite lamination or bonding.

[0034] like Figure 5 As shown, the motor of this embodiment further includes an end cover 400, and a bearing mounting seat 410 is disposed in the middle area of ​​the end cover 400, and at least a portion of the bearing mounting seat 410 is accommodated in the air-avoiding area 130. In this way, a portion of the bearing mounting seat 410 with a large axial protrusion distance can be accommodated, thereby reducing the space occupied by the height of the bearing mounting seat 410.

[0035] like Figure 5 As shown, the stator 200 of this embodiment may include various known stator structures, such as permanent magnets, windings and other structures. The stator 200 is fixed on the end cover 400 , and the height of the stator 200 can be set according to the thickness of the inner rotor core 100 .

[0036] like Figure 6As shown, the motor of this embodiment can be used for a range hood fan. Specifically, the shaft 300 of the motor is connected to the impeller 500 of the range hood fan. When the inner rotor core 100 rotates, the shaft 300 is driven to rotate together, thereby driving the impeller 500 to rotate.

[0037] The utility model reduces the height of the motor, so that the overall height of the motor is reduced, effectively reducing the flow resistance of the fan system and increasing the fan air volume. It can also effectively reduce the moment of inertia and increase the motor starting ability, and can be manufactured using a more material-saving processing method.

[0038] Although the specific implementations of the utility model are described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the attached claims. Those skilled in the art can make various changes or modifications to these implementations without departing from the principle and essence of the utility model, but these changes and modifications fall within the protection scope of the utility model.

Claims

1. A motor, comprising a stator and an inner rotor core, characterized in that: The inner rotor core is formed by a plurality of end laminations and middle laminations stacked and connected along the axial direction, and the inner rotor core includes an axial hole, an outer periphery and an end portion, and the end portion is formed with an inwardly recessed air avoidance area, wherein at least a plurality of middle laminations are formed with a first segmented shape corresponding to the axial hole and a second segmented shape corresponding to the outer periphery, and at least one or more end laminations are formed with a third segmented shape corresponding to the wall of the air avoidance area and a second segmented shape corresponding to the outer periphery, and the end laminations are located on one side or both sides of the middle laminations.

2. The motor according to claim 1, characterized in that The end laminations have the same third segmented shape, and the third segmented shapes on one or more end laminations are stacked along the axial direction to form the clearance area with parallel wall surfaces.

3. The motor according to claim 1, characterized in that The end laminations have different third segment shapes, and the third segment shapes on one or more end laminations are stacked along the axial direction to form the air avoidance area with an inclined wall surface or an arc-shaped wall surface.

4. The motor according to claim 1, characterized in that The end laminations and the middle section laminations have the same second segmented shape, are stacked along the axial direction, and form the outer periphery having parallel wall surfaces.

5. The motor according to claim 1, characterized in that The inner rotor core includes a plurality of weight-reducing holes, which are exposed in the air-avoiding area, wherein a fourth segment shape corresponding to the weight-reducing holes is formed on the middle section laminations, and the fourth segment shapes on the plurality of middle section laminations are stacked axially to form the weight-reducing holes.

6. The motor according to claim 1, characterized in that The end laminations and the middle laminations are both formed by stamping.

7. The motor according to claim 1, characterized in that The inner rotor core has a circular outer periphery, and the distance between each location of the third segmented shape of each end lamination and the axis of the inner rotor core is less than or equal to 75% of the radius of the inner rotor core.

8. The motor according to claim 1, characterized in that The middle section laminations and the end laminations are formed by composite lamination or bonding.

9. The motor according to any one of claims 1 to 8, characterized in that: The motor further comprises an end cover, a middle area of ​​the end cover is provided with a bearing mounting seat, and at least a portion of the bearing mounting seat is accommodated in the air avoidance area.

10. A fan for a range hood, characterized in that: The fan for the range hood comprises the motor as described in any one of claims 1-9.

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