Stator rear end cover of external rotor motor

Abstract

The utility model provides a stator rear end cover of an external rotor motor, comprising a stator rear end cover body, the stator rear end cover body is internally provided with a plurality of diversion cavities distributed at intervals in the circumferential direction, every two adjacent diversion cavities are communicated through at least one diversion channel, the outer side of the stator rear end cover body is provided with a cooling liquid inlet, and the cooling liquid inlet is communicated with the diversion channels. The cooling liquid inlet is communicated with one flow guide cavity, and the inner side of the stator rear end cover body is provided with cooling liquid outlets which are communicated with the flow guide cavities in a one-to-one manner. After the cooling device is applied to the outer rotor motor, the plurality of cooling liquid outlets which are distributed at intervals in the circumferential direction can spray cooling liquid towards the stator winding at the same time, so that the stator winding can be uniformly cooled, and the cooling effect on the stator winding is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of outer rotor motors, in particular to a stator rear end cover of an outer rotor motor. Background Art

[0002] Outer rotor motors are a common type of motors on the market. When the high-power, high-speed outer rotor motors on the market are working, the stator windings inside the outer rotor motors will generate more heat. In order to improve the cooling effect of the stator windings, motors that use coolants to cool the stator windings are now available on the market. For example, Chinese Patent Publication No.: CN116545159A discloses a motor with bearing and stator winding cooling functions. When the motor is in use, the coolant can flow through the casing to cool the stator windings. However, in the above-mentioned motor structure with bearing and stator winding cooling functions, although the coolant can flow through the casing and cool the stator windings, the coolant has the disadvantage of poor uniformity when flowing in the casing, making it difficult to achieve uniform cooling of the stator windings. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a stator rear end cover of an outer rotor motor. After being applied to the outer rotor motor, a plurality of coolant outlets distributed at circumferential intervals can simultaneously spray coolant toward the stator winding, thereby achieving uniform cooling of the stator winding and improving the cooling effect of the stator winding.

[0004] The utility model provides a stator rear end cover of an outer rotor motor, comprising a stator rear end cover body, wherein a plurality of flow guide cavities which are circumferentially spaced are arranged inside the stator rear end cover body, and each two adjacent flow guide cavities are communicated through at least one flow guide channel, a coolant inlet is arranged on the outer side of the stator rear end cover body, and the coolant inlet is communicated with one of the flow guide cavities, and a coolant outlet which is communicated with each flow guide cavity one by one is arranged on the inner side of the stator rear end cover body.

[0005] After the utility model is applied to the outer rotor motor, the coolant can enter each guide cavity through the coolant inlet and the guide channel, and the coolant entering each guide cavity can be sprayed out through the corresponding coolant outlet, that is, a plurality of coolant outlets distributed at circumferential intervals can spray coolant toward the stator winding at the same time, that is, a plurality of coolant outlets distributed at circumferential intervals can spray coolant in the circumferential direction of the stator winding, thereby achieving uniform cooling of the stator winding and improving the cooling effect of the stator winding.

[0006] In a possible implementation, every two adjacent guide cavities are connected by two guide channels, and the two guide channels between every two adjacent guide cavities are respectively located at the inner edge and the outer edge of the guide cavity; by adopting this structure, the coolant from the previous guide cavity can enter the next guide cavity more smoothly through the two guide channels, that is, the coolant can reach the location of each guide cavity more smoothly and evenly.

[0007] In a possible embodiment, the width of the guide channel near the inner edge of the guide cavity is greater than the width of the guide channel near the outer edge of the guide cavity; after adopting this structure, since the inner circumference of the stator rear end cover body is smaller than the outer circumference, by setting the width of the guide channel near the inner edge of the guide cavity to be greater than the width of the guide channel near the outer edge of the guide cavity, the flow rate of the coolant flowing through the guide channel near the inner edge of the guide cavity can be slowed down, and the flow rate of the coolant flowing through the guide channel near the outer edge of the guide cavity can be increased, so that the flow rate of the coolant flowing through the two guide channels between every two guide cavities can be kept consistent as much as possible, that is, the coolant can flow evenly into each guide cavity.

[0008] In a possible implementation, each coolant outlet is aligned with the middle of the corresponding guide cavity; by adopting this structure, the coolant entering the guide cavity can be discharged more smoothly and evenly from the coolant outlet at the corresponding position.

[0009] In a possible embodiment, a plurality of fixing holes distributed at circumferential intervals are provided on the inner edge of the stator rear end cover body, and the fixing holes are used for bolts to pass through so as to facilitate the fixation of the stator rear end cover body and the core support in the outer rotor motor; reinforcing ribs are provided on both sides of each fixing hole, and each reinforcing rib extends along the axial direction of the stator rear end cover body; by adopting this structure, the stator rear end cover body can be reliably fixed to the core support in the outer rotor motor; by providing reinforcing ribs on both sides of each fixing hole, the structural strength of the stator rear end cover body can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a first three-dimensional structural schematic diagram of the utility model;

[0011] Figure 2 This is a second three-dimensional structural schematic diagram of the utility model;

[0012] Figure 3 It is a three-dimensional cross-sectional structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0013] First, those skilled in the art should understand that these implementations are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0014] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0015] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0016] The present application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] See also Figure 1-3 As shown, an embodiment of the present application discloses a stator rear end cover of an outer rotor motor, including a stator rear end cover body 1, a plurality of guide cavities 11 distributed at circumferential intervals are arranged inside the stator rear end cover body 1, and each two adjacent guide cavities 11 are connected by at least one guide channel 12, a coolant inlet 13 is arranged on the outer side of the stator rear end cover body 1, and the coolant inlet 13 is connected to one of the guide cavities 11, and a coolant outlet 14 connected to each guide cavity 11 one by one is arranged on the inner side of the stator rear end cover body 1.

[0018] Every two adjacent guide cavities 11 are connected by two guide channels 12, and the two guide channels 12 between every two adjacent guide cavities 11 are respectively located at the inner edge and the outer edge of the guide cavity 11; by adopting this structure, the coolant from the previous guide cavity can enter the next guide cavity more smoothly through the two guide channels, that is, the coolant can reach the location of each guide cavity more smoothly and evenly.

[0019] The width of the guide channel 12 near the inner edge of the guide cavity 11 is greater than the width of the guide channel 12 near the outer edge of the guide cavity 11; after adopting this structure, since the inner circumference of the stator rear end cover body is smaller than the outer circumference, by setting the width of the guide channel near the inner edge of the guide cavity to be greater than the width of the guide channel near the outer edge of the guide cavity, the flow rate of the coolant flowing through the guide channel near the inner edge of the guide cavity can be slowed down, and the flow rate of the coolant flowing through the guide channel near the outer edge of the guide cavity can be increased, so that the flow rate of the coolant flowing through the two guide channels between every two guide cavities can be kept consistent as much as possible, that is, the coolant can flow evenly to each guide cavity.

[0020] Each coolant outlet 14 is aligned with the middle of the corresponding guide cavity 11; by adopting this structure, the coolant entering the guide cavity can be discharged more smoothly and evenly from the coolant outlet at the corresponding position.

[0021] A plurality of fixing holes 15 are arranged on the inner edge of the stator rear end cover body 1 and are distributed at intervals in the circumferential direction. The fixing holes 15 are used for passing bolts to facilitate fixing the stator rear end cover body 1 to the core support in the outer rotor motor; reinforcing ribs 16 are arranged on both sides of each fixing hole 15, and each reinforcing rib 16 extends along the axial direction of the stator rear end cover body 1; by adopting this structure, the stator rear end cover body can be reliably fixed to the core support in the outer rotor motor; by arranging reinforcing ribs on both sides of each fixing hole, the structural strength of the stator rear end cover body can be improved.

[0022] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A stator rear end cover of an outer rotor motor, comprising a stator rear end cover body (1), characterized in that: A plurality of flow guide cavities (11) are arranged inside the stator rear end cover body (1) and are distributed at intervals in the circumferential direction. Each two adjacent flow guide cavities (11) are connected via at least one flow guide channel (12). A coolant inlet (13) is arranged on the outside of the stator rear end cover body (1), and the coolant inlet (13) is connected to one of the flow guide cavities (11). A coolant outlet (14) is arranged on the inside of the stator rear end cover body (1) and is connected to each of the flow guide cavities (11) one by one.

2. The stator rear end cover of the outer rotor motor according to claim 1, characterized in that: Every two adjacent flow guiding cavities (11) are connected via two flow guiding channels (12), and the two flow guiding channels (12) between every two adjacent flow guiding cavities (11) are respectively located at the inner edge and the outer edge of the flow guiding cavity (11).

3. The stator rear end cover of the outer rotor motor according to claim 2, characterized in that: The width of the guide channel (12) near the inner edge of the guide cavity (11) is greater than the width of the guide channel (12) near the outer edge of the guide cavity (11).

4. The stator rear end cover of the outer rotor motor according to any one of claims 1 to 3, characterized in that: Each of the cooling liquid outlets (14) is aligned with the middle of the corresponding flow guide cavity (11).

5. The stator rear end cover of the outer rotor motor according to any one of claims 1 to 3, characterized in that: A plurality of fixing holes (15) are arranged on the inner edge of the stator rear end cover body (1) and are distributed at intervals in the circumferential direction. The fixing holes (15) are used for bolts to pass through so as to facilitate fixing the stator rear end cover body (1) to the core support in the outer rotor motor. Reinforcing ribs (16) are arranged on both sides of each of the fixing holes (15), and each of the reinforcing ribs (16) extends along the axial direction of the stator rear end cover body (1).

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