Liquid coating tool

Abstract

The utility model discloses a liquid coating tool. The liquid coating tool comprises an outer barrel, the outer barrel is provided with a first containing cavity, and the first containing cavity is provided with a first upper opening; the inner barrel is located above the bottom wall face of the first containing cavity, the peripheral face of the inner barrel is located on the inner side of the side wall face of the first containing cavity, the inner barrel is provided with a second containing cavity, and the second containing cavity is provided with a second upper opening; and the liquid conveying device is matched with each of the first accommodating cavity and the second accommodating cavity so as to convey the insulating paint in the first accommodating cavity into the second accommodating cavity. When the liquid coating tool is used for coating insulating paint, not only can the consistency of the coating position of a workpiece be effectively ensured, but also the section porosity of an insulating coating can be greatly reduced, and the surface to be treated of the workpiece can be completely covered.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of insulating layer coating, specifically, to liquid coating tool. BACKGROUND

[0002] In order to improve the safety of motor, the end of the winding of the stator needs to be insulated. In the related art, solid powder fluidized bed is used to coat the end of the winding of the stator with insulating material. However, the solid powder coating has the defects of incomplete coverage and high porosity of the coating layer, resulting in poor insulation performance of the motor. SUMMARY

[0003] The utility model discloses at least one of the technical problems in the related art is solved to some extent. To this end, the utility model provides a liquid coating tool.

[0004] The liquid coating tool of the utility model includes: an outer barrel, the outer barrel has a first containing cavity, the first containing cavity has a first upper opening; an inner barrel, the inner barrel is located above the bottom wall surface of the first containing cavity, the outer circumferential surface of the inner barrel is located on the inner side of the side wall surface of the first containing cavity, wherein the inner barrel has a second containing cavity, the second containing cavity has a second upper opening; and a liquid delivery device, the liquid delivery device cooperates with each of the first containing cavity and the second containing cavity to deliver the insulating paint in the first containing cavity into the second containing cavity.

[0005] By using the liquid coating tool of the utility model for insulating paint coating, not only the consistency of the coating position of the workpiece can be effectively ensured, but also the cross-sectional porosity of the insulating coating can be greatly reduced, and the surface to be treated of the workpiece can be completely covered.

[0006] Optionally, the upper edge of the side wall surface of the inner barrel is located above the upper edge of the side wall surface of the outer barrel so that the insulating paint overflowing from the second containing cavity flows into the first containing cavity; and / or the distance between the lower surface of the inner barrel and the bottom wall surface of the first containing cavity in the up-down direction is greater than or equal to a first preset value.

[0007] Optionally, the liquid delivery device has a first liquid inlet and a first liquid outlet, the first liquid inlet communicates with the first containing cavity, and the first liquid outlet communicates with the second containing cavity.

[0008] Optionally, the bottom of the side wall surface of the first containing cavity is provided with a second liquid outlet, or the bottom of the side wall surface of the first containing cavity is provided with the second liquid outlet, and the liquid coating tool further includes a first delivery pipe, one end of the first delivery pipe is connected with the second liquid outlet, and the other end of the first delivery pipe is connected with the first liquid inlet.

[0009] Optionally, the liquid coating tool further comprises a second conveying pipe, one end of the second conveying pipe being in communication with the first liquid outlet, and the other end of the second conveying pipe being in communication with the second accommodating cavity.

[0010] Optionally, the second conveying pipe comprises: a first section and a second section, one end of the first section being connected with the first liquid outlet, and the other end of the first section being connected with the second section; and an inclined section, an upper end of the inclined section being connected with an upper end of the second section, the inclined section extending downward and inward from the second section, and a lower end of the inclined section being in communication with the second accommodating cavity.

[0011] Optionally, the second conveying pipe further comprises a first elbow and a second elbow, one end of the first elbow being connected with the other end of the first section, the other end of the first elbow being connected with the lower end of the second section, one end of the second elbow being connected with the upper end of the second section, the other end of the second elbow being connected with the upper end of the inclined section, the inclined section extending downward and inward from the second elbow; and / or the second conveying pipe further comprises a third elbow, one end of the third elbow being connected with the lower end of the inclined section, and the other end of the third elbow being in communication with the second accommodating cavity.

[0012] Optionally, the opening of the other end of the third elbow faces downward, and the other end of the third elbow extends into the second accommodating cavity through the second upper opening.

[0013] Optionally, the first section extends in a horizontal direction, the first section being located below the outer barrel, the second section extends in a vertical direction, the second section being located outside the outer barrel, the other end of the third elbow is adjacent to a side wall surface of the second accommodating cavity in the horizontal direction, and / or the angle between the extending direction of the inclined section and a horizontal plane is less than or equal to a second preset value.

[0014] Optionally, the liquid coating tool further comprises a storage barrel, the liquid conveying device cooperating with the storage barrel to convey insulating paint in the storage barrel into the second accommodating cavity.

[0015] Optionally, the liquid coating tool further comprises a first liquid level detector and a second liquid level detector, the first liquid level detector and the second liquid level detector being spaced apart in an up-down direction on a side wall surface of the first accommodating cavity, the first liquid level detector being located above the second liquid level detector.

[0016] Optionally, the liquid coating tool further comprises a mechanical arm for clamping the stator, the mechanical arm being movably arranged between a coating position and a loading position, the mechanical arm being matched with the second accommodating cavity when being located at the coating position, and the mechanical arm being located outside the outer barrel when being located at the loading position.

[0017] Optionally, the liquid delivery device delivers the insulating paint in the first accommodating cavity into the second accommodating cavity so as to fill the second accommodating cavity with the insulating paint. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic view of a liquid coating tool according to an embodiment of the present application;

[0019] Figure 2 is a partial structural schematic view of a liquid coating tool according to an embodiment of the present application. DETAILED DESCRIPTION

[0020] Embodiments of the present application are described in detail below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.

[0021] A liquid coating tool 100 according to an embodiment of the present application is described below with reference to the accompanying drawings. As shown in Figure 1 and Figure 2 the liquid coating tool 100 according to the embodiment of the present application comprises an outer barrel 1, an inner barrel 2 and a liquid delivery device 3.

[0022] The outer barrel 1 has a first accommodating cavity 11, and the first accommodating cavity 11 has a first upper opening 12, i.e. the upper end of the first accommodating cavity 11 is open. The inner barrel 2 has a second accommodating cavity 22, and the second accommodating cavity 22 has a second upper opening 23, i.e. the upper end of the second accommodating cavity 22 is open. The inner barrel 2 is located above a bottom wall surface 13 of the first accommodating cavity 11, and an outer peripheral surface 21 of the inner barrel 2 is located inside a side wall surface 14 of the first accommodating cavity 11. That is, a projection of the inner barrel 2 on a horizontal plane in a vertical direction is located inside a projection of the first accommodating cavity 11 on the horizontal plane in the vertical direction. The liquid delivery device 3 is matched with each of the first accommodating cavity 11 and the second accommodating cavity 22 so as to deliver the insulating paint in the first accommodating cavity 11 into the second accommodating cavity 22.

[0023] When the liquid coating tool 100 is used to coat the surface of the workpiece to be processed, the second accommodating cavity 22 can be filled with liquid insulating paint, i.e., the liquid level of the liquid insulating paint is flush with the upper edge of the second accommodating cavity 22. The workpiece is moved downward so that the surface of the workpiece to be processed is immersed in the insulating paint in the second accommodating cavity 22, at this time, the insulating paint in the second accommodating cavity 22 continuously overflows as the workpiece continuously moves downward, so that the liquid level of the insulating paint in the second accommodating cavity 22 remains unchanged. Thus, the consistency of the workpiece coating position can be effectively ensured, so that the coating position and coating height of different workpieces are consistent with each other, thereby effectively improving the coating stability and improving the coating effect.

[0024] After coating, the workpiece is moved upward to separate the workpiece from the insulating paint in the second accommodating cavity 22, at this time, the surface of the workpiece to be processed forms a liquid film of insulating paint. Finally, the liquid film of insulating paint on the surface of the workpiece to be processed is solidified to form an insulating coating.

[0025] By using the liquid coating tool 100 according to the embodiment of the present application to coat the surface of the workpiece to be processed, not only can the insulating coating completely cover the surface of the workpiece to be processed, but also can greatly reduce the holes in the insulating coating and greatly reduce the cross-sectional porosity of the insulating coating, thereby significantly enhancing the insulation performance of the workpiece.

[0026] Specifically, the cross-sectional porosity of the insulating coating obtained by solid powder coating in the prior art is about 20%, and the cross-sectional porosity of the insulating coating obtained by insulating paint coating using the liquid coating tool 100 according to the embodiment of the present application is less than or equal to 3%, and the fluctuation of the coating position of different workpieces is less than or equal to 0.5 mm.

[0027] Since the inner barrel 2 is located above the bottom wall surface 13 of the first accommodating cavity 11, and the outer peripheral surface 21 of the inner barrel 2 is located inside the side wall surface 14 of the first accommodating cavity 11, the insulating paint overflowing from the second accommodating cavity 22 will flow into the first accommodating cavity 11. After one workpiece is coated, the liquid conveying device 3 can be used to convey the insulating paint in the first accommodating cavity 11 to the second accommodating cavity 22, so that the second accommodating cavity 22 is filled with insulating paint again, so that the next workpiece can be coated.

[0028] Therefore, by using the liquid coating tool 100 according to the embodiment of the present application to coat the insulating paint, not only can the consistency of the workpiece coating position be effectively ensured, but also the cross-sectional porosity of the insulating coating can be greatly reduced, and the surface of the workpiece to be processed can be completely covered.

[0029] As Figure 1 and Figure 2As shown, the liquid coating tool 100 comprises an outer barrel 1, an inner barrel 2 and a liquid delivery device 3. The liquid delivery device 3 can be a pump.

[0030] The outer barrel 1 can be horizontally arranged. The first accommodating cavity 11 of the outer barrel 1 has a first upper opening 12, so that the insulating paint overflowing from the second accommodating cavity 22 enters the first accommodating cavity 11 through the first upper opening 12. A certain amount of insulating paint can be stored in the first accommodating cavity 11, so as to timely supplement the insulating paint into the second accommodating cavity 22.

[0031] As shown in Figure 1 and Figure 2 The inner barrel 2 can be horizontally arranged. The second accommodating cavity 22 of the inner barrel 2 has a second upper opening 23, so that the workpiece is immersed into the insulating paint in the second accommodating cavity 22 through the second upper opening 23. Optionally, the workpiece is a stator 200, and the surface to be treated of the workpiece is the surface 2111 of the end portion 211 of the winding 210 of the stator 200.

[0032] The inner barrel 2 is located above the bottom wall surface 13 of the first accommodating cavity 11. Optionally, the upper edge of the side wall surface 25 of the inner barrel 2 is located above the upper edge of the side wall surface 14 of the outer barrel 1, so that the insulating paint overflowing from the second accommodating cavity 22 flows into the first accommodating cavity 11, that is, at least a part of the inner barrel 2 is located above the first accommodating cavity 11. In this way, more insulating paint can be stored in the first accommodating cavity 11, so as to avoid frequent supplement of insulating paint into the first accommodating cavity 11, thereby making the liquid coating tool 100 more convenient to use.

[0033] Further optionally, a part of the inner barrel 2 is located above the upper edge of the outer barrel 1, and another part of the inner barrel 2 is located in the first accommodating cavity 11. In this way, the overall height of the liquid coating tool 100 can be reduced while ensuring that the first accommodating cavity 11 can store more insulating paint.

[0034] Optionally, the lower surface 24 of the inner barrel 2 is spaced apart from the bottom wall surface 13 of the first accommodating cavity 11 in the up-down direction by a distance greater than or equal to a first preset value. In this way, more insulating paint can be stored in the first accommodating cavity 11, so as to avoid frequent supplement of insulating paint into the first accommodating cavity 11, thereby making the liquid coating tool 100 more convenient to use. The up-down direction is shown by the arrow A in Figure 1 , and the horizontal direction is shown by the arrow B in Figure 1 .

[0035] As shown in Figure 1 and Figure 2As shown in the figures, the bottom wall surface 13 of the first accommodating cavity 11 is provided with the second liquid outlet 15, or the bottom of the side wall surface 14 of the first accommodating cavity 11 is provided with the second liquid outlet 15. In this way, the insulating paint in the first accommodating cavity 11 can be more fully utilized, and more insulating paint in the first accommodating cavity 11 can be delivered into the second accommodating cavity 22, thereby avoiding frequent replenishment of insulating paint into the first accommodating cavity 11, so as to make the liquid coating tool 100 more convenient to use.

[0036] The liquid delivery device 3 has a first liquid inlet 31 and a first liquid outlet 32, the first liquid inlet 31 of the liquid delivery device 3 is in communication with the first accommodating cavity 11, and the first liquid outlet 32 of the liquid delivery device 3 is in communication with the second accommodating cavity 22. In this way, the liquid delivery device 3 can deliver the liquid insulating paint in the first accommodating cavity 11 into the second accommodating cavity 22.

[0037] The liquid coating tool 100 further comprises a first delivery pipe 4, one end of the first delivery pipe 4 is connected with the second liquid outlet 15, and the other end of the first delivery pipe 4 is connected with the first liquid inlet 31 of the liquid delivery device 3. In this way, the structure of the liquid coating tool 100 can be more reasonable.

[0038] As shown in the figures, Figure 1 and Figure 2 the first liquid inlet 31 is located below the second liquid outlet 15, and the first delivery pipe 4 extends in the vertical direction. The upper end of the first delivery pipe 4 is connected with the second liquid outlet 15, and the lower end of the first delivery pipe 4 is connected with the first liquid inlet 31 of the liquid delivery device 3. By locating the first liquid inlet 31 of the liquid delivery device 3 below the second liquid outlet 15 of the outer barrel 1, the liquid (insulating paint) at the first liquid inlet 31 of the liquid delivery device 3 has a certain pressure, so as to facilitate the delivery of the liquid by the liquid delivery device 3.

[0039] Optionally, the liquid delivery device 3 is located below the outer barrel 1, thereby making the structure of the liquid coating tool 100 more reasonable.

[0040] As shown in the figures, Figure 1 and Figure 2 the liquid coating tool 100 further comprises a second delivery pipe 5, one end of the second delivery pipe 5 is in communication with the first liquid outlet 32 of the liquid delivery device 3, and the other end of the second delivery pipe 5 is in communication with the second accommodating cavity 22. In this way, the structure of the liquid coating tool 100 can be more reasonable.

[0041] Optionally, the second conveying pipe 5 comprises a first section 51, a second section 52 and an inclined section 55. One end of the first section 51 is connected with the first liquid outlet 32 of the liquid conveying device 3, and the other end of the first section 51 is connected with a lower end of the second section 52. An upper end of the inclined section 55 is connected with an upper end of the second section 52, and the inclined section 55 extends downward and inward from the second section 52, and a lower end of the inclined section 55 is in communication with the second accommodating cavity 22. "Inward" refers to a direction towards the middle (center line) of the second accommodating cavity 22. By arranging the inclined section 55, the insulating paint in the second conveying pipe 5 can flow into the second accommodating cavity 22 more smoothly and stably.

[0042] As shown in Figure 1 and Figure 2 , the liquid coating tool 100 further comprises a first elbow 53 and a second elbow 54. One end of the first elbow 53 is connected with the other end of the first section 51, and the other end of the first elbow 53 is connected with the lower end of the second section 52. One end of the second elbow 54 is connected with the upper end of the second section 52, and the other end of the second elbow 54 is connected with the upper end of the inclined section 55. The inclined section 55 extends downward and inward from the second elbow 54. By arranging the first elbow 53, the first section 51 and the second section 52 can be more conveniently connected. By arranging the second elbow 54, the inclined section 55 and the second section 52 can be more conveniently connected.

[0043] As shown in Figure 1 and Figure 2 , the liquid coating tool 100 further comprises a third elbow 56, one end of the third elbow 56 is connected with the lower end of the inclined section 55, and the other end of the third elbow 56 is in communication with the second accommodating cavity 22. By arranging the third elbow 56 connected with the inclined section 55, and making the other end of the third elbow 56 in communication with the second accommodating cavity 22, the insulating paint in the second conveying pipe 5 can flow into the second accommodating cavity 22 more smoothly and stably.

[0044] Optionally, the opening of the other end of the third elbow 56 faces downward, and the other end of the third elbow 56 extends into the second accommodating cavity 22 through the second upper opening 23. By making the other end of the third elbow 56 located in the second accommodating cavity 22 and the opening facing downward, the insulating paint in the second conveying pipe 5 can flow into the second accommodating cavity 22 more smoothly and stably.

[0045] Optionally, the angle between the extending direction of the inclined section and the horizontal plane is less than or equal to a second preset value. In this way, the insulating paint in the second conveying pipe 5 can flow into the second accommodating cavity 22 more smoothly and stably.

[0046] As shown in Figure 1 and Figure 2As shown, the other end of the third elbow 56 is adjacent to the side wall surface 25 of the second accommodating cavity 22 in the horizontal direction. Thus, the third elbow 56 can be prevented from interfering with the workpiece, so that the liquid coating tool 100 can be used to coat workpieces of different sizes, thereby expanding the application range of the liquid coating tool 100. For example, the liquid coating tool 100 can be used to coat the end 211 of the winding 210 of a stator 200 of different diameters.

[0047] As shown in Figure 1 and Figure 2 , the first section 51 extends in the horizontal direction, i.e., the first section 51 can be a horizontal section. The first section 51 is located below the outer barrel 1, so that the end of the first section 51 can be more conveniently and easily connected to the first liquid outlet 32 of the liquid delivery device 3.

[0048] The second section 52 extends in the vertical direction, i.e., the second section 52 can be a vertical section. The second section 52 is located outside the outer barrel 1, so that the structure of the liquid coating tool 100 is more reasonable.

[0049] As shown in Figure 1 , the liquid coating tool 100 further comprises a storage barrel 6, and the liquid delivery device 3 cooperates with the storage barrel 6 to deliver the insulating paint in the storage barrel 6 into the second accommodating cavity 22. Thus, when the insulating paint in the first accommodating cavity 11 of the outer barrel 1 is almost consumed, the liquid delivery device 3 can be used to deliver the insulating paint stored in the storage barrel 6 into the second accommodating cavity 22, and then the insulating paint in the second accommodating cavity 22 overflows into the first accommodating cavity 11, thereby completing the replenishment of the insulating paint in the first accommodating cavity 11.

[0050] Optionally, as shown in Figure 1 , the liquid delivery device 3 further has a second liquid inlet 33, and the storage barrel 6 has a third liquid outlet 61. The liquid coating tool 100 further comprises a third delivery pipe 7, one end of the third delivery pipe 7 is connected to the third liquid outlet 61 of the storage barrel 6, and the other end of the third delivery pipe 7 is connected to the second liquid inlet 33 of the liquid delivery device 3. Thus, the structure of the liquid coating tool 100 is more reasonable.

[0051] Optionally, the liquid coating tool 100 further comprises a first liquid level detector and a second liquid level detector. The first liquid level detector and the second liquid level detector are spaced apart in the up-down direction on the side wall surface 14 of the first accommodating cavity 11, and the first liquid level detector is located above the second liquid level detector. Thus, the liquid level of the insulating paint in the first accommodating cavity 11 can be detected by the first liquid level detector and the second liquid level detector.

[0052] When the second liquid level detector fails to detect the liquid level of the insulating paint in the first accommodating cavity 11, it indicates that the insulating paint in the first accommodating cavity 11 is insufficient, and the insulating paint needs to be supplemented into the first accommodating cavity 11. At this time, the liquid conveying device 3 can be started to convey the insulating paint stored in the storage tank 6 into the second accommodating cavity 22 by the liquid conveying device 3, and then the insulating paint in the second accommodating cavity 22 overflows into the first accommodating cavity 11. When the first liquid level detector detects the liquid level of the insulating paint in the first accommodating cavity 11, it indicates that more insulating paint has been supplemented into the first accommodating cavity 11, and at this time the liquid conveying device 3 can be turned off.

[0053] Optionally, the liquid coating tool 100 further comprises a mechanical arm for clamping the stator 200, and the mechanical arm is movably arranged between a coating position and a loading position. The mechanical arm located at the coating position cooperates with the second accommodating cavity 22, and the mechanical arm located at the loading position is located outside the outer barrel 1. By arranging the mechanical arm, the automation degree of the liquid coating tool 100 can be improved, and the coating efficiency of the liquid coating tool 100 can be improved.

[0054] The mechanical arm located at the loading position can clamp the stator 200, and then the mechanical arm drives the stator 200 to move inward, so as to move the stator 200 directly above the second accommodating cavity 22. Then, the mechanical arm drives the stator 200 to move downward until the end 211 of the winding 210 of the stator 200 is immersed in the insulating paint in the second accommodating cavity 22, and at this time the mechanical arm is located at the coating position. After the coating is completed, the mechanical arm drives the stator 200 to move upward first and then drives the stator 200 to move outward, so as to make the stator 200 enter the next process.

[0055] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0056] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0057] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0058] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or it can only mean that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or it can only mean that the horizontal height of the first feature is less than that of the second feature.

[0059] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. Those skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0060] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. Those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A liquid application tool characterized by, Comprising: an outer tub having a first accommodating cavity with a first upper opening; an inner tub located above a bottom wall surface of the first accommodating cavity, an outer peripheral surface of the inner tub located inside a side wall surface of the first accommodating cavity, wherein the inner tub has a second accommodating cavity with a second upper opening; and a liquid delivery device cooperating with each of the first accommodating cavity and the second accommodating cavity so as to deliver an insulating paint in the first accommodating cavity into the second accommodating cavity.

2. The liquid coating tool according to claim 1, wherein: an upper edge of a side wall surface of the inner tub is located above an upper edge of a side wall surface of the outer tub so that insulating paint overflowing from the second accommodating cavity flows into the first accommodating cavity; and / or a lower surface of the inner tub is spaced apart from the bottom wall surface of the first accommodating cavity in a vertical direction by a distance greater than or equal to a first predetermined value.

3. The liquid application tool of claim 1, wherein, the liquid delivery device has a first liquid inlet communicating with the first accommodating cavity and a first liquid outlet communicating with the second accommodating cavity.

4. The liquid application tool of claim 3, wherein, the bottom wall surface of the first accommodating cavity is provided with a second liquid outlet or a bottom portion of a side wall surface of the first accommodating cavity is provided with the second liquid outlet, and the liquid coating tool further comprises a first delivery pipe, one end of the first delivery pipe being connected to the second liquid outlet and the other end of the first delivery pipe being connected to the first liquid inlet.

5. The liquid application tool of claim 3, wherein, the liquid coating tool further comprises a second delivery pipe, one end of the second delivery pipe communicating with the first liquid outlet and the other end of the second delivery pipe communicating with the second accommodating cavity.

6. The liquid application tool of claim 5, wherein, the second delivery pipe comprises: a first section and a second section, one end of the first section being connected to the first liquid outlet and the other end of the first section being connected to the second section; and an inclined section, an upper end of the inclined section being connected to an upper end of the second section, the inclined section extending downwardly and inwardly from the second section, and a lower end of the inclined section communicating with the second accommodating cavity.

7. The liquid coating tool according to claim 6, wherein: the second delivery pipe further comprises a first elbow and a second elbow, one end of the first elbow being connected to the other end of the first section, the other end of the first elbow being connected to the lower end of the second section, one end of the second elbow being connected to the upper end of the second section, the other end of the second elbow being connected to the upper end of the inclined section, and the inclined section extending downwardly and inwardly from the second elbow; and / or the second delivery pipe further comprises a third elbow, one end of the third elbow being connected to the lower end of the inclined section, and the other end of the third elbow communicating with the second accommodating cavity.

8. The liquid application tool of claim 7, wherein, an opening of the other end of the third elbow faces downwardly, and the other end of the third elbow extends into the second accommodating cavity through the second upper opening.

9. The liquid coating tool according to claim 7, wherein: The first section extends horizontally and is located below the outer barrel, the second section extends vertically and is located outside the outer barrel, and the other end of the third elbow is horizontally adjacent to the side wall of the second accommodating cavity; and / or The included angle between the extending direction of the inclined section and the horizontal plane is less than or equal to a second preset value.

10. The liquid application tool of claim 1, wherein, It further includes a material storage barrel, and the liquid delivery device cooperates with the material storage barrel to deliver the insulating paint in the material storage barrel to the second accommodating cavity.

11. The liquid application tool of claim 10, wherein, It further includes a first liquid level detector and a second liquid level detector, which are arranged on the side wall of the first accommodating cavity at intervals in the up and down directions, and the first liquid level detector is located above the second liquid level detector.

12. The liquid application tool of any of claims 1-11, wherein, It further includes a robotic arm for clamping the stator, the robotic arm being movably arranged between a coating position and a loading position, the robotic arm at the coating position cooperating with the second accommodating cavity, and the robotic arm at the loading position being located outside the outer barrel.

13. The liquid application tool of any one of claims 1-11, wherein, The liquid conveying device conveys the insulating paint in the first accommodating chamber to the second accommodating chamber, so that the insulating paint fills the second accommodating chamber.

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