Motor cooling structure and motor

Abstract

The utility model discloses a motor cooling structure and a motor. The motor cooling structure and the motor comprise a motor housing which is internally provided with at least one cooling air path which is communicated from a non-driving end to a driving end; the flange end cover is arranged at the driving end of the motor housing, and at least one ventilation hole is formed in the side wall of the flange end cover; the bearing outer cover is arranged at the driving end of the motor housing, and the ventilation hole is used for guiding air of the cooling air path to the bearing outer cover; the wind scooper is arranged on the flange end cover in a covering mode, a wind guiding channel with an opening facing the cooling wind path is formed between the wind scooper and the flange end cover, and the ventilation holes are communicated with the wind guiding channel. According to the motor cooling structure and the motor, the problems that the flange end cover hinders the air circulation of the bearing chamber of the motor driving end and the motor driving end cannot be effectively cooled by air are solved, and the effects of effectively cooling the bearing chamber of the motor driving end, reducing the bearing loss and improving the operation safety of the motor are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and in particular to a motor cooling structure and a motor. Background Art

[0002] During the operation of the motor, the bearing plays a crucial role and bears the combined axial and radial loads. The magnitude of this load is directly affected by the motor speed. When the speed increases, the load on the bearing also increases. In the case of high-speed operation, the temperature rise of the bearing is relatively high. If the temperature of the bearing rises too high, its durability and performance will be damaged, thereby affecting the life of the rotating components of the motor and possibly reducing the overall performance of the motor. In extreme cases, overheating of the bearing may pose a threat to the safety of the motor. Once the temperature of the bearing component rises to a certain critical value, the safe operation of the motor will be at risk.

[0003] Currently, the cooling of the motor bearing component mainly adopts air-cooling technology. This air-cooling system relies on the driving end of the motor to generate air flow and dissipates heat through the non-driving end of the motor. However, due to the presence of the flange end cover, it is difficult for the air at the non-driving end of the motor to cool the bearing chamber. When the customer installs the motor, since the non-driving end of the motor is usually in a relatively enclosed environment, the air circulation is restricted, resulting in unsatisfactory cooling effect.

[0004] The driving end of the motor is the load end, where the bearing bears a large load, generates a large amount of heat, which is difficult to conduct away, the bearing temperature is relatively high, and bearing loss is likely to occur, affecting the safe operation of the motor. Summary of the Utility Model

[0005] In view of this, the utility model provides a motor cooling structure and a motor, which can effectively cool the bearing chamber at the driving end of the motor, reduce bearing loss, and improve the safe operation of the motor.

[0006] According to an embodiment of the utility model, a motor cooling structure is provided, which includes a motor housing with at least one cooling air path communicating from the non-driving end to the driving end; a flange end cover disposed at the driving end of the motor housing, and at least one ventilation hole is opened on the side wall of the flange end cover; a bearing outer cover disposed at the driving end of the motor housing, and the ventilation hole is used to divert the air in the cooling air path to the bearing outer cover; a wind guide cover covering the flange end cover and forming a wind guide channel with an opening facing the cooling air path between the wind guide cover and the flange end cover, and the ventilation hole is communicated with the wind guide channel.

[0007] In a preferred embodiment, the wind guide cover and the flange end cover form a sealing fit structure at the end far from the cooling air path.

[0008] In a preferred embodiment, the flange end cover includes a radial flange and a connecting cylinder. The radial flange is connected to one end of the connecting cylinder away from the non-driving end. The cross-section of the connecting cylinder increases along the direction away from the non-driving end. Ventilation holes are formed in the connecting cylinder, and a wind guide cover is sleeved outside the connecting cylinder.

[0009] In a preferred embodiment, the wind guide cover includes a connecting flange and a cover body connected to the connecting flange. The connecting flange is butted and fixedly connected to the radial flange, and the cover body is sleeved outside the connecting cylinder.

[0010] In a preferred embodiment, a connecting rib plate is arranged between the radial flange and the connecting cylinder, and an avoidance groove is formed in the end of the wind guide cover close to the radial flange corresponding to the connecting rib plate.

[0011] In a preferred embodiment, a plurality of connecting rib plates are arranged circumferentially between the radial flange and the connecting cylinder, and at least one ventilation hole is arranged between adjacent connecting rib plates.

[0012] In a preferred embodiment, the wind guide cover includes a connecting flange and a cover body connected to the connecting flange. The cover body includes an arc section and a straight cylinder section. The arc section is connected between the connecting flange and the straight cylinder section, and the arc section gradually expands outward along the direction close to the straight cylinder section.

[0013] In a preferred embodiment, the arc section is concave downward on one side close to the center axis of the wind guide cover at the end close to the connecting flange, and convex upward on one side away from the center axis of the wind guide cover at the end close to the straight cylinder section.

[0014] In a preferred embodiment, an annular gap is formed between the annular structure at the minimum diameter of the arc section and the connecting cylinder.

[0015] According to another aspect of the present invention, a motor is provided, including a motor cooling structure, and the motor cooling structure is the above-mentioned motor cooling structure.

[0016] As can be seen from the above solution, the motor cooling structure and the motor proposed according to the present utility model include: a motor housing having at least one cooling air passage inside that communicates from the non-driving end to the driving end; a flange end cover provided at the driving end of the motor housing, and at least one ventilation hole is provided on the side wall of the flange end cover; a bearing outer cover provided at the driving end of the motor housing, and the ventilation hole is used to divert the air in the cooling air passage to the bearing outer cover; a wind guiding cover covering the flange end cover and forming a wind guiding channel with an opening facing the cooling air passage between the wind guiding cover and the flange end cover, and the ventilation hole communicates with the wind guiding channel. The cooling air flow generated at the non-driving end of the motor flows from the non-driving end to the driving end through the cooling air passage inside the motor housing. At the driving end of the motor, the flange end cover and the wind guiding cover cooperate to form a wind guiding channel, guiding the cooling air flow flowing out from the non-driving end from the cooling air passage to the flange end cover. At least one ventilation hole is provided on the side wall of the flange end cover to ensure that the cooling air flow can smoothly pass through the flange end cover through the ventilation hole and flow to the bearing outer cover at the driving end of the motor, taking away the heat transferred from the bearing to the bearing outer cover, thereby overcoming the problem that the flange end cover hinders the air circulation outside the bearing outer cover at the driving end of the motor and cannot effectively cool the driving end of the motor by air cooling, and achieving the effect of cooling and reducing the temperature of the motor bearing in the bearing chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following will, by referring to the accompanying drawings, describe in detail the preferred embodiments of the present utility model, making the above and other features and advantages of the present utility model clearer to those of ordinary skill in the art. In the drawings:

[0018] Figure 1 is an axonometric view of the motor cooling structure and the motor according to the present utility model;

[0019] Figure 2 is a schematic structural view of the motor cooling structure and the motor according to the present utility model;

[0020] Figure 3 is Figure 2 a cross-sectional view taken along line A-A of

[0021] Figure 4 is another schematic structural view of the motor cooling structure and the motor according to the present utility model;

[0022] Figure 5 is Figure 4 a cross-sectional view taken along line B-B of

[0023] Figure 6 is an axonometric view of the flange end cover of the motor cooling structure and the motor according to the present utility model;

[0024] Figure 7 is another axonometric view of the flange end cover of the motor cooling structure and the motor according to the present utility model;

[0025] Figure 8 The first schematic structural diagram of the motor cooling structure and the flange end cover of the motor according to the present utility model;

[0026] Figure 9 The second schematic structural diagram of the motor cooling structure and the flange end cover of the motor according to the present utility model;

[0027] Figure 10 The side schematic structural diagram of the motor cooling structure and the flange end cover of the motor according to the present utility model;

[0028] Figure 11 is Figure 10 the sectional view taken along the line A-A of

[0029] Figure 12 The axonometric view of the motor cooling structure and the air guide cover of the motor according to the present utility model;

[0030] Figure 13 Another axonometric view of the motor cooling structure and the air guide cover of the motor according to the present utility model;

[0031] Figure 14 The first schematic structural diagram of the motor cooling structure and the air guide cover of the motor according to the present utility model;

[0032] Figure 15 The side schematic structural diagram of the motor cooling structure and the air guide cover of the motor according to the present utility model; and

[0033] Figure 16 The second schematic structural diagram of the motor cooling structure and the air guide cover of the motor according to the present utility model.

[0034] In the above-mentioned drawings, the following reference numerals are adopted:

[0035] 1. Motor housing; 2. Flange end cover; 21. Radial flange; 22. Connecting cylinder; 3. Bearing outer cover; 4. Air guide cover; 41. Connecting flange; 42. Cover body; 5. Ventilation hole; 6. Cooling air path; 7. Air guide channel; 8. Connecting rib plate; 9. Avoidance groove. Detailed implementation manners

[0036] To make the objectives, technical solutions and advantages of the present utility model clearer, the following examples are given to further elaborate on the present utility model in detail.

[0037] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0038] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.

[0039] In the present utility model, in the absence of contrary statements, the orientation terms such as "upper, lower, top, bottom" are usually in reference to the direction shown in the drawings, or in reference to the vertical, perpendicular or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner, outer" refer to the inner and outer of the contour of each component itself, but the above orientation terms are not used to limit the present utility model.

[0040] As Figures 1 to 16 shown, according to an embodiment of the present utility model, the motor cooling structure includes:

[0041] A motor housing 1, which has at least one cooling air duct 6 communicating from the non-driving end to the driving end inside.

[0042] A flange end cover 2, which is arranged at the driving end of the motor housing 1, and at least one ventilation hole 5 is provided on the side wall of the flange end cover 2.

[0043] A bearing outer cover 3, which is arranged at the driving end of the motor housing 1, and the ventilation hole 5 is used to divert the air in the cooling air duct 6 to the bearing outer cover 3.

[0044] A wind guide cover 4, which is sleeved on the flange end cover 2 and forms a wind guide channel 7 with an opening facing the cooling air duct 6 between the wind guide cover 4 and the flange end cover 2, and the ventilation hole 5 communicates with the wind guide channel 7.

[0045] The cooling air flow generated at the non-driving end of the motor flows from the non-driving end to the driving end through the cooling air duct 6 inside the motor housing 1. At the driving end of the motor, a wind guide channel is formed by the cooperation of the flange end cover 2 and the wind guide cover, and the cooling air flow flowing out from the non-driving end is led from the cooling air duct 6 to the flange end cover 2. At least one ventilation hole 5 is provided on the side wall of the flange end cover 2 to ensure that the cooling air flow can smoothly pass through the flange end cover 2 through the ventilation hole 5 and flow to the bearing outer cover 3 at the driving end of the motor, taking away the heat transferred from the bearing to the bearing outer cover 3, thereby overcoming the problem that the flange end cover 2 hinders the air circulation outside the bearing outer cover 3 at the driving end of the motor and cannot effectively cool the driving end of the motor by air cooling, and achieving the effect of cooling the motor bearing in the bearing chamber.

[0046] In this embodiment, the motor housing 1 wraps the internal components of the motor to protect the internal components of the motor. At the same time, the surface of the motor housing 1 with grooves can increase the contact area between the motor housing 1 and the air, having the effect of assisting heat dissipation; the flange end cover 2 is used for sealing one end of the motor to protect the internal components of the motor and play a role of fixed support. At least one ventilation hole 5 is provided on the side wall of the flange end cover 2 so that the cooling air flow can reach the bearing cover 3 at the drive end of the motor through the ventilation hole 5, taking away the heat transferred from the bearing to the bearing cover 3, thereby cooling and reducing the temperature of the motor bearing in the bearing chamber; the bearing cover 3 is mainly used to protect the bearing and prevent external pollutants from entering the bearing interior and causing wear and damage to the bearing; the air guide cover 4 is sleeved on the flange end cover 2 and forms an air guide channel 7 with an opening facing the cooling air path 6 between the air guide cover 4 and the flange end cover 2. At the same time, the air guide cover 4 connects the ventilation hole 5 with the air guide channel 7, so that the cooling air flow generated at the non-drive end can enter the ventilation hole 5 through the cooling air path 6 and the air guide channel 7, and then reach the bearing chamber to cool and reduce the temperature of the motor bearing.

[0047] In one embodiment, the air guide cover 4 and the flange end cover 2 form a sealing fit structure at one end away from the cooling air path 6.

[0048] In this embodiment, the air guide cover 4 and the flange end cover 2 are hermetically fitted at one end away from the cooling air path 6, avoiding generating a gap between the air guide cover 4 and the flange end cover 2, preventing the cooling air flow from flowing to the external space through the gap between the air guide cover 4 and the flange end cover 2 and causing air leakage problems, thereby improving the utilization efficiency of the cooling air flow.

[0049] In one embodiment, a sealing gasket is provided at the connection position between the air guide cover 4 and the flange end cover 2, which can further enhance the sealing effect between the air guide cover 4 and the flange end cover 2. In one embodiment, the flange end cover 2 includes a radial flange 21 and a connecting cylinder 22. The radial flange 21 is connected to one end of the connecting cylinder 22 away from the non-drive end. The cross-section of the connecting cylinder 22 increases along the direction away from the non-drive end. The ventilation hole 5 is provided on the connecting cylinder 22, and the air guide cover 4 is sleeved outside the connecting cylinder 22.

[0050] In this embodiment, screw holes are provided on the radial flange 21, which are mainly used for connection and fixation after docking with the connection flange 41. The cross-section of the connection cylinder 22 increases along the direction away from the non-driving end. Connection blocks are provided on the connection cylinder 22, and screw holes are provided on the connection blocks. The flange end cover 2 is bolted to the motor main body through the screw holes on the connection blocks, sealing the motor while realizing the installation and fixation of the flange end cover 2. The air guide cover 4 covers the outside of the connection cylinder 22, thereby forming an air guide channel 7 connecting the cooling air path 6 and the ventilation holes 5 between the air guide cover 4 and the connection cylinder 22, restricting the flow path of the cooling air flow, and improving the efficiency of the cooling air flow reaching the bearing outer cover 3. The ventilation holes 5 are opened on the connection cylinder 22, providing a channel for the cooling air flow to pass through and contact the bearing outer cover 3, making it flow towards the bearing outer cover 3 to cool down the bearing outer cover 3.

[0051] In one embodiment, the air guide cover 4 includes a connection flange 41 and a cover body 42 connected to the connection flange 41. The connection flange 41 is docked and fixedly connected with the radial flange 21, and the cover body 42 covers the outside of the connection cylinder 22.

[0052] In this embodiment, the air guide cover 4 includes a connection flange 41 and a cover body 42 connected to the connection flange 41. The connection flange 41 has through holes corresponding to the radial flange 21. The connection between the air guide cover 4 and the flange end cover 2 is realized by docking and fixedly connecting the connection flange 41 with the radial flange 21. The cover body 42 covers the outside of the connection cylinder 22, thereby forming an air guide channel 7 connecting the cooling air path 6 and the ventilation holes 5 inside the air guide cover 4 to restrict the flow path of the cooling air flow.

[0053] In one embodiment, a connection rib plate 8 is provided between the radial flange 21 and the connection cylinder 22, and an avoidance groove is provided at one end of the air guide cover 4 close to the radial flange 41 corresponding to the connection rib plate 8.

[0054] In this embodiment, the connection rib plate 8 is used to improve the connection strength between the radial flange 21 and the connection cylinder 22. However, when installing the air guide cover 4, the connection rib plate 8 will block the air guide cover 4, resulting in the air guide cover 4 being unable to fit the flange end cover 2 for installation. Therefore, an avoidance groove 9 is provided at one end of the air guide cover 4 close to the radial flange 21 to ensure that the air guide cover 4 can avoid the connection rib plate 8 and fit the flange end cover 2 during installation, thereby ensuring that the air guide cover 4 completely covers the gap between the motor housing 1 and the flange end cover 2, preventing the generation of gaps communicating with the outside and causing a decrease in the cooling air flow diversion efficiency, and further avoiding a decrease in the cooling effect at the bearing outer cover 3.

[0055] In one embodiment, a plurality of connection rib plates 8 are circumferentially provided between the radial flange 21 and the connection cylinder 22, and at least one ventilation hole 5 is provided between adjacent connection rib plates 8.

[0056] In this embodiment, a plurality of connecting rib plates 8 are circumferentially arranged between the radial flange 21 and the connecting cylinder 22, which can further improve the connection strength between the radial flange 21 and the connecting cylinder 22. At least one ventilation hole 5 is arranged between adjacent connecting rib plates 8, so that each circumferentially separated compartment formed between adjacent connecting rib plates 8 can communicate with the space on the side where the bearing cover 3 is located through the ventilation hole 5. Thus, when the cooling air flow flows to the area between any adjacent connecting rib plates 8, it can smoothly flow through the ventilation hole 5 to the bearing cover 3 to cool and dissipate heat from the bearing cover 3. This can not only prevent the cooling air flow from staying in the cavity formed by adjacent connecting rib plates 8 and disturbing the normal flow of the cooling air flow in the air guiding channel 7, but also improve the flow efficiency of the cooling air flow and enhance the cooling effect of the bearing drive end.

[0057] In one embodiment, the air guiding cover 4 includes a connecting flange 41 and a cover body 42 connected to the connecting flange 41. The cover body 42 includes an arc section and a straight cylinder section. The arc section is connected between the connecting flange 41 and the straight cylinder section, and the arc section gradually expands outward along the direction close to the straight cylinder section.

[0058] In this embodiment, the cover body 42 covers the outside of the connecting cylinder 22, so that the air guiding cover 4 covers the gap between the motor cover 1 and the flange end cover 2. Thus, an air guiding channel 7 connecting the cooling air path 6 and the ventilation hole 5 is formed inside the air guiding cover 4. The straight cylinder section covers the motor cover 1 and extends towards the non-drive end to rectify the cooling air flow in the air guiding channel 7 and guide the cooling air flow to flow regularly towards the direction of the ventilation hole 5, improving the flow efficiency of the cooling air flow. At the same time, it wraps the outlet of the cooling air path 6 towards the drive end as much as possible to increase the air guiding range of the air guiding cover 4. The arc section deflects the cooling air flow and guides the cooling air flow to turn along the arc of the inner surface of the arc section towards the ventilation hole 5, reducing the wind force loss during the turning process of the cooling air flow, so that the cooling air flow can pass through the flange end cover 2 via the ventilation hole 5 and reach the bearing cover 3.

[0059] In one embodiment, one end of the arc section close to the connecting flange 41 is concave towards the side close to the central axis of the air guiding cover 4, and one end of the arc section close to the straight cylinder section is convex towards the side away from the central axis of the air guiding cover 4.

[0060] In this embodiment, the arc segment is concave downward on one side close to the center axis of the air guide cover 4 at one end close to the connecting flange 41, and convex upward on one side away from the center axis of the air guide cover 4 at one end close to the straight cylinder segment, so that the inner surface of the air guide channel 7 forms an arc that contracts toward the ventilation hole 5. On the one hand, it guides the cooling air flow, guides the cooling air flow to turn toward the ventilation hole 5, so that the cooling air flow can pass through the flange end cover 2 via the ventilation hole 5 and reach the bearing outer cover 3. On the other hand, the contracted flow channel can significantly increase the flow velocity of the cooling air flow, so that the cooling air flow quickly blows toward the bearing outer cover 3 through the flange end cover 2, quickly cools the bearing outer cover 3, and thus improves the cooling effect of the bearing outer cover 3.

[0061] In one embodiment, an annular gap is formed between the annular structure at the minimum diameter of the arc segment and the connecting cylinder 22.

[0062] In this embodiment, an annular gap is formed between the annular structure at the minimum diameter of the arc segment and the connecting cylinder 22, avoiding the problem that the arc segment of the air guide cover 4 clings to the connecting cylinder 22 of the flange end cover 2, resulting in poor flow of the cooling air flow and unable to pass through the flange end cover 2 smoothly via the ventilation hole 5, and ensuring the smoothness of the air duct.

[0063] According to another aspect of the present invention, a motor is proposed, including a motor cooling structure, and the motor cooling structure is the above-mentioned motor cooling structure.

[0064] As can be seen from the above solution, for the motor cooling structure and the motor proposed according to the present utility model, the motor housing 1 wraps the internal components of the motor to protect the internal components of the motor. At the same time, the surface of the motor housing 1 with grooves can increase the contact area between the motor housing 1 and the air, having the effect of assisting heat dissipation. In addition, there is a certain interval between the motor housing 1 and the internal components of the motor to form a cooling air path 6; the flange end cover 2 is used for sealing one end of the motor to protect the internal components of the motor and plays a role of fixed support. At least one ventilation hole 5 is provided on the side wall of the flange end cover 2 to facilitate the cooling air flow to reach the bearing chamber at the motor drive end through the ventilation hole 5, so as to cool down the motor bearing in the bearing chamber; the bearing outer cover 3 is mainly used to protect the bearing and prevent external pollutants from entering the bearing interior and causing wear and damage to the bearing; the air guide cover 4 is sleeved on the flange end cover 2 and forms an air guide channel 7 with an opening facing the cooling air path 6 between the air guide cover 4 and the flange end cover 2. At the same time, the air guide cover 4 connects the ventilation hole 5 with the air guide channel 7, so that the cooling air flow generated at the non-drive end can enter the ventilation hole 5 through the cooling air path 6 and the air guide channel 7, and then reach the bearing chamber to cool down the motor bearing. The cooling air flow generated at the non-drive end of the motor flows from the non-drive end to the drive end through the cooling air path 6 inside the motor housing 1. At the motor drive end, the flange end cover 2 and the air guide cover 4 cooperate to form an air guide channel 7, guiding the cooling air flow flowing out from the non-drive end from the cooling air path 6 to the flange end cover 2. At least one ventilation hole 5 is provided on the side wall of the flange end cover 2 to ensure that the cooling air flow can smoothly pass through the flange end cover 2 through the ventilation hole 5 and flow into the bearing chamber at the motor drive end, realizing the cooling and temperature reduction of the motor bearing in the bearing chamber. The motor cooling structure and the motor proposed by the present utility model overcome the problem that the flange end cover 2 hinders the air circulation in the bearing chamber at the motor drive end and cannot effectively cool and reduce the temperature of the motor drive end by air cooling, realizing the effective cooling of the bearing chamber at the motor drive end, reducing the bearing loss, and improving the safety of motor operation.

[0065] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A motor cooling structure, characterized in that, Comprising: A motor housing (1) having at least one cooling air duct (6) inside that communicates from the non-drive end to the drive end; A flange end cover (2) disposed at the drive end of the motor housing (1), and at least one ventilation hole (5) is formed in the side wall of the flange end cover (2); A bearing outer cover (3) disposed at the drive end of the motor housing (1), and the ventilation hole (5) is used to divert the air in the cooling air duct (6) to the bearing outer cover (3); A wind guide cover (4) covering the flange end cover (2) and forming a wind guide channel (7) with an opening facing the cooling air duct (6) between the wind guide cover (4) and the flange end cover (2), and the ventilation hole (5) communicates with the wind guide channel (7).

2. The motor cooling structure according to claim 1, wherein The wind guide cover (4) and the flange end cover (2) form a sealing fit structure at one end away from the cooling air duct (6).

3. The motor cooling structure according to claim 2, wherein The flange end cover (2) includes a radial flange (21) and a connecting cylinder (22), the radial flange (21) is connected to one end of the connecting cylinder (22) away from the non-drive end, the cross-section of the connecting cylinder (22) increases along the direction away from the non-drive end, the ventilation hole (5) is formed in the connecting cylinder (22), and the wind guide cover (4) covers the outside of the connecting cylinder (22).

4. The motor cooling structure according to claim 3, wherein, The wind guide cover (4) includes a connecting flange (41) and a cover body (42) connected to the connecting flange (41), the connecting flange (41) is butted and fixedly connected to the radial flange (21), and the cover body (42) covers the outside of the connecting cylinder (22).

5. The motor cooling structure according to claim 3 or 4, characterized in that, A connecting rib plate (8) is provided between the radial flange (21) and the connecting cylinder (22), and an avoidance groove (9) is formed in the wind guide cover (4) near one end of the radial flange (21) corresponding to the connecting rib plate (8).

6. The motor cooling structure according to claim 3 or 4, characterized in that, A plurality of connecting rib plates (8) are circumferentially arranged between the radial flange (21) and the connecting cylinder (22), and at least one ventilation hole (5) is provided between adjacent connecting rib plates (8).

7. The motor cooling structure according to claim 3, characterized in that, The wind guide cover (4) includes a connecting flange (41) and a cover body (42) connected to the connecting flange (41), the cover body (42) includes an arc section and a straight cylinder section, the arc section is connected between the connecting flange (41) and the straight cylinder section, and the arc section gradually expands outward along the direction close to the straight cylinder section.

8. The motor cooling structure according to claim 7, characterized in that One end of the arc section near the connecting flange (41) is concave toward the side close to the central axis of the wind guide cover (4), and one end of the arc section near the straight cylinder section is convex toward the side away from the central axis of the wind guide cover (4).

9. The motor cooling structure according to claim 7, wherein, An annular gap is formed between the annular structure at the minimum diameter of the arc section and the connecting cylinder (22).

10. A motor, comprising a motor cooling structure, characterized in that, The motor cooling structure is the motor cooling structure according to any one of claims 1 to 9.

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