Motor outlet box

Abstract

The invention belongs to the technical field of outlet box sealing, and particularly relates to a motor outlet box. The outlet box comprises a seat body installed on a motor casing, a box body supported on the seat body, an insulating plate which is arranged at the bottom of the box body and is detachably and fixedly connected with the seat body, and a plurality of binding post units which penetrate through the insulating plate and are arranged in a sealing manner, the binding post unit comprises a binding post with different diameter parts in the axial direction and an insulating pressing cover for pressing the binding post in the insulating plate; the insulating plate is provided with a stepped hole matched with the binding post unit, and a sealing structure is arranged on the joint face, abutting against the binding post, of the stepped hole. Therefore, the insulating pressing cover of the outlet box can press the binding post on the insulating plate, so that the sealing structure between the binding post and the insulating plate can realize effective sealing. And meanwhile, the contact state of a sealing interface is optimized, so that the sealing structure only bears axial compression instead of torsion and is not deformed and abraded, the service life of the sealing structure is greatly prolonged, and the service life of the motor is prolonged.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of sealing of an outlet box, and particularly relates to a motor outlet box. BACKGROUND

[0002] Motors that need to be connected to an external power source need an outlet box, which is a safe connection hub between the internal winding of the motor and the external power cable, and is usually located outside the motor housing. For ordinary dry-type motors, the main purpose of the outlet box is to prevent dust and moisture, but for oil-filled or water-filled motors, sealing is the main requirement. The reason is that the medium inside the motor has changed fundamentally, and we need to prevent the exchange of the two kinds of media inside and outside through the "passage" of the outlet box. For oil-filled motors, oil acts as an insulating and cooling medium inside the motor, which wraps around the winding to ensure electrical insulation and carry away the heat generated during operation. If the oil leaks, the oil level drops, which can cause part of the winding to be exposed to the air, resulting in a sharp drop in insulation strength, which can easily cause short circuits, arcing, and even burn out the motor. Moreover, the reduction of oil quantity reduces the heat dissipation capacity, causing the motor to overheat, resulting in a shortened motor life or even direct damage. In addition, the leaked insulating oil is usually a flammable product, which poses a fire risk and also pollutes the environment. For water-filled motors: water is usually used as an efficient cooling medium (especially pure water or deionized water). If the water leaks, the pressure and water level drop, the cooling system pressure is insufficient, and the water cannot circulate effectively to the heating part, causing the motor to overheat. Moreover, modern motors have sensors that will immediately alarm and shut down if the cooling liquid level or pressure is too low, affecting production progress.

[0003] However, the conventional outlet box and terminal post are not well sealed, and have poor reliability, and for oil-filled or water-filled motors, there is a risk of water or oil leakage, which can shorten the service life of the motor. SUMMARY

[0004] (I) Technical problems to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the application provides a motor outlet box, thereby solving the technical problem of poor sealing of the outlet box of the existing oil-filled or water-filled motor, which can shorten the service life of the motor.

[0006] (II) Technical solutions

[0007] In order to achieve the above-mentioned purposes, the main technical solutions adopted by the application include:

[0008] The motor outlet box provided by the embodiment of the application comprises a seat body mounted on a motor shell, a box body supported on the seat body, an insulating plate detachably fixedly connected to the seat body and arranged at the bottom of the box body, and a plurality of terminal post units arranged through the insulating plate in a sealed manner.

[0009] Further, the terminal post comprises a pressure bearing part and a mounting part connected to each other, the diameter of the pressure bearing part is larger than that of the mounting part, and the pressure bearing part is located above the mounting part; the stepped hole comprises a first hole and a second hole connected to each other, the diameter of the first hole is larger than that of the second hole, and the first hole is located above the second hole; the joint surface of the stepped hole and the terminal post comprises a first joint surface formed by the bottom surface of the pressure bearing part and the bottom surface of the first hole and a second joint surface formed by the bottom surface of the mounting part and the bottom surface of the second hole when the terminal post is located in the insulating plate; the sealing structure comprises a first sealing structure arranged on the first joint surface and a second sealing structure arranged on the second joint surface; when the terminal post is pressed in the insulating plate by the insulating pressing cover, the first sealing structure and the second sealing structure are respectively deformed radially by the extrusion of the first joint surface and the second joint surface to tightly fill the gap between the terminal post and the insulating plate.

[0010] Further, the side surface of the mounting part is processed with at least two parallel planes, and the inner contour of the second hole is matched with the outer contour of the mounting part to form an anti-rotation structure, so that the mounting part can be inserted into the second hole but cannot rotate in the second hole.

[0011] Further, the upper edge of the pressure bearing part is provided with a circle of chamfers, the inner side center of the insulating pressing cover is provided with a circle of wedge-shaped protrusions protruding downward, and the wedge-shaped protrusions can be matched with the chamfers; the insulating pressing cover is connected to the insulating plate through threads, as the insulating pressing cover is continuously screwed into the insulating plate, the wedge-shaped protrusions are tightly matched with the chamfers to form a pressure bearing surface, the pressure bearing surface decomposes the force applied by the insulating pressing cover to the terminal post into a downward pressing force and a circumferential constraint force, the pressing force causes the first sealing structure and the second sealing structure to be deformed radially, and the constraint force causes the insulating pressing cover to tightly hold the terminal post to generate a static friction force between the terminal post and the insulating pressing cover to limit the rotation of the terminal post.

[0012] Further, the pressure bearing part is connected with a first terminal at the top, the center of the insulating pressing cover is provided with a first through hole, a first sealing plug is arranged in the first through hole, a second through hole is arranged in the first sealing plug, and a wire wound on the first terminal extends out of the insulating pressing cover through the second through hole; the diameter of the second through hole is smaller than that of the wire.

[0013] Further, the second wiring terminal is connected below the mounting portion, the bottom cover is arranged at the second wiring terminal at the lower part of the insulating plate, the bottom cover is detachably connected with the lower part of the insulating plate, the third through hole is arranged at the center of the bottom cover, the diameter of the third through hole is greater than or equal to the diameter of the second wiring terminal, the second sealing plug is embedded in the bottom cover, the fourth through hole is arranged in the second sealing plug, and the wire extending from the motor is wound on the second wiring terminal through the fourth through hole.

[0014] Further, the junction surface between the seat body and the insulating plate is provided with a multi-stage sealing structure; the multi-stage sealing structure comprises a profiled sealing strip, an annular third sealing groove and a fourth sealing groove are respectively arranged on the upper surface of the seat body and the lower surface of the insulating plate, the profiled sealing strip comprises at least three continuous and concentric stepped protrusions, the third sealing groove and the fourth sealing groove at least partially wrap the profiled sealing strip after being buckled, and the wrapped profiled sealing strip part can completely fill the third sealing groove and the fourth sealing groove.

[0015] Further, the first sealing gasket is arranged on the mounting surface between the box body and the seat body.

[0016] Further, the box cover is detachably mounted above the box body, and the second sealing gasket is arranged on the mounting surface between the box cover and the box body.

[0017] Further, the air permeable net is mounted on the side surface of the box body to balance the pressure in the box body.

[0018] (Three) beneficial effects

[0019] The beneficial effects of the present application are:

[0020] The motor outlet box of the present application is sealed with a plurality of terminal post units on the insulating plate in the box body, and the insulating compression cover in the terminal post unit can compress the terminal post to the insulating plate, so that the sealing structure between the terminal post and the insulating plate can be effectively sealed. Compared with the prior art, the insulating compression cover in the terminal post unit can effectively prevent the leakage of the liquid in the motor, ensure the sealing effect of the terminal post, and prolong the service life and reliability of the sealing structure. At the same time, the contact state of the sealing interface is optimized, so that the sealing structure only bears axial compression and not torsion, so it will not be deformed and worn out, and its service life can be greatly prolonged, thereby prolonging the service life of the motor. Moreover, the insulating compression cover makes the compression force more uniform and controllable, and also improves the long-term reliability of the sealing.

[0021] Moreover, the terminal post unit structure is compact and integrated in the insulating plate area, without the need for additional space, and the terminal post and the insulating plate assembly process is simple and intuitive, and when disassembled, only the insulating compression cover needs to be loosened, and the terminal post can be easily taken out for maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1Fig. 1 is a structural schematic diagram of a motor outlet box;

[0023] Figure 2 Fig. 2 is a structural schematic diagram of an internal structure of the motor outlet box;

[0024] Figure 3 Fig. 3 is a sectional view of the motor outlet box;

[0025] Figure 4 Fig. 4 is a structural schematic diagram of Figure 3 Fig. 5 is a partial enlarged schematic diagram of A in Fig. 4;

[0026] Figure 5 Fig. 6 is an exploded schematic diagram of the insulating plate and the seat body;

[0027] Figure 6 Fig. 7 is a structural schematic diagram of the insulating plate;

[0028] Figure 7 Fig. 8 is a structural schematic diagram of the terminal post;

[0029] Figure 8 Fig. 9 is a sectional view of the insulating compression cover;

[0030] Figure 9 Fig. 10 is a structural schematic diagram of the bottom cover;

[0031] Figure 10 Fig. 11 is a structural schematic diagram of the special-shaped sealing strip;

[0032] Figure 11 Fig. 12 is a structural schematic diagram of Figure 10 Fig. 13 is a partial enlarged schematic diagram of B in Fig. 12.

[0033]

BRIEF DESCRIPTION OF THE DRAWINGS

[0034] 1: insulating plate; 11: first hole; 12: second hole;

[0035] 2: terminal post; 21: pressure bearing part; 211: chamfer; 212: first O-ring; 22: mounting part; 221: second O-ring; 23: first terminal end; 24: second terminal end;

[0036] 3: insulating compression cover; 31: protrusion; 32: first through hole; 33: first sealing plug; 331: second through hole;

[0037] 4: bottom cover; 41: third through hole; 42: second sealing plug; 421: fourth through hole;

[0038] 5: seat body; 51: third sealing groove; 52: screw hole;

[0039] 6: box body; 61: first sealing gasket; 62: air permeable mesh; 63: filler chamber;

[0040] 7: box cover; 71: second sealing gasket;

[0041] 8: profiled sealing strip. DETAILED DESCRIPTION

[0042] In order to better understand the above technical solutions, the exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present application can be more clearly, completely and accurately understood, and the scope of the present application can be fully conveyed to those skilled in the art.

[0043] As shown in Figures 1-11 , the present application provides a motor terminal box, as shown in Figures 1-3 , comprising a seat body 5 mounted on a motor housing, a box body 6 supported on the seat body 5, an insulating plate 1 disposed at the bottom of the box body 6 and detachably fixedly connected with the seat body 5, and a plurality of terminal post units sealingly disposed through the insulating plate 1.

[0044] As shown in Figures 2-4 , the terminal post unit comprises a stepped shaft-shaped terminal post 2 having different diameter portions in the axial direction and an insulating compression cover 3 compressing the terminal post 2 in the insulating plate 1, and the insulating compression cover 3 is detachably fixed with the insulating plate 1.

[0045] As shown in Figures 2-6 , the insulating plate 1 is provided with a stepped hole matched with the terminal post unit, and a sealing structure is provided on the joint surface of the stepped hole abutting against the terminal post 2, which is used for sealing between the terminal post 2 and the insulating plate 1.

[0046] Specifically, as shown in Figures 2-4 , Figure 7 , the terminal post 2 comprises a first terminal end 23, a pressure receiving portion 21, a mounting portion 22 and a second terminal end 24 connected in sequence, the diameter of the pressure receiving portion 21 is greater than that of the mounting portion 22, and the pressure receiving portion 21 is located above the mounting portion 22. As shown in Figures 2-6 , the stepped hole comprises a first hole 11, a second hole 12 and a third hole connected in sequence, the diameter of the first hole 11 is greater than that of the second hole 12, the first hole 11 is located above the second hole 12, and the diameter of the third hole is greater than or equal to that of the second terminal end 24, and the third hole is located below the second hole.

[0047] As shown in Figures 2-4As shown, the abutment surface of the stepped hole and the terminal post 2 includes a first abutment surface formed by the bottom surface of the pressure receiving portion 21 and the bottom surface of the first hole 11 when the terminal post 2 is located in the insulating plate 1, and a second abutment surface formed by the bottom surface of the mounting portion 22 and the bottom surface of the second hole 12. The sealing structure includes a first sealing structure provided on the first abutment surface and a second sealing structure provided on the second abutment surface. The first sealing structure includes a first sealing groove provided on the bottom surface of the pressure receiving portion 21 and a first O-ring 212 filled in the first sealing groove, and the height of the first O-ring 212 is slightly greater than the depth of the first sealing groove. The second sealing structure includes a second sealing groove provided on the bottom surface of the mounting portion 22 and a second O-ring 221 filled in the second sealing groove, and the height of the second O-ring 221 is slightly greater than the depth of the second sealing groove.

[0048] When the insulating compression cover 3 compresses the terminal post 2 to the insulating plate 1, the first sealing structure and the second sealing structure are respectively extruded by the first abutment surface and the second abutment surface, so that the first O-ring 212 and the second O-ring 221 are radially deformed to tightly fill the gap between the terminal post 2 and the insulating plate 1 to achieve sealing.

[0049] In particular, the upper edge of the pressure receiving portion 21 is provided with a chamfer 211, and the inner side of the insulating compression cover 3 is provided with a downwardly protruding wedge-shaped protrusion 31, and the wedge-shaped protrusion 31 can be fitted with the chamfer 211.

[0050] The insulating compression cover 3 is connected with the insulating plate 1 by screwing, and as the insulating compression cover 3 is continuously screwed into the insulating plate 1, the wedge-shaped protrusion 31 and the chamfer 211 are tightly fitted to form an inclined pressure receiving surface, and the inclined pressure receiving surface decomposes the force applied by the insulating compression cover 3 to the terminal post 2 into a compression force that presses the terminal post 2 downward as a whole and a circumferential constraint force, the compression force causes the first sealing structure and the second sealing structure to be radially deformed to achieve sealing, and the constraint force causes the insulating compression cover 3 to tightly embrace the terminal post 2 to generate a static friction force between the insulating compression cover 3 and the terminal post 2 to limit the rotation of the terminal post 2, and the compression force and the constraint force form a combined effect of sealing and locking.

[0051] The insulating compression cover 3 integrates the functions of "compression" and "anti-rotation" in one operation, and by changing the mechanical transmission path between the insulating compression cover 3 and the terminal post 2 through the inclined pressure receiving surface, it simultaneously achieves the effects of "compression and sealing" and "circumferential anti-rotation", thus eliminating the risk of wear of the first sealing structure and the second sealing structure caused by the rotation of the terminal post 2.

[0052] At the same time, as Figure 6 , Figure 7As shown, the side of the mounting portion 22 is machined with at least two parallel planes, the inner contour of the second hole 12 is adapted to the outer contour of the mounting portion 22 to form an anti-rotation structure, so that the mounting portion 22 can be inserted into the second hole 12 but cannot rotate in the second hole 12. When wiring, the terminal post 2 is clamped in the insulating plate 1 and fixed, improving the sealing effect.

[0053] When installing, the mounting portion 22 is inserted into the second hole 12, at which time the anti-rotation structure preliminarily limits the rotation of the terminal post 2. Then the insulating compression cover 3 is screwed to compress the terminal post 2, and the circumferential restraining force generated cooperates with the anti-rotation structure to completely eliminate the possibility of rotation of the terminal post 2 under any circumstances.

[0054] As shown in Figures 2-4 , Figures 7-9 , the pressure-bearing portion 21 is connected with a first terminal end 23 above, and the insulating compression cover 3 is provided with a first through hole 32 in the center, and a first sealing plug 33 is arranged in the first through hole 32, and a second through hole 331 is formed in the first sealing plug 33, and the wire wound on the first terminal end 23 extends out of the insulating compression cover 3 from the second through hole 331. The diameter of the second through hole 331 is smaller than the diameter of the wire, so as to ensure that the wire is sealed by the first sealing plug 33.

[0055] The second terminal end 24 is connected below the mounting portion 22, and cooperates with the third hole, and the bottom cover 4 is arranged at the second terminal end 24 at the lower part of the insulating plate 1, and the bottom cover 4 is detachably connected with the lower part of the insulating plate 1, and the third through hole 41 is formed in the center of the bottom cover 4, and the diameter of the third through hole 41 is greater than or equal to the diameter of the second terminal end 24, and the second sealing plug 42 is embedded in the bottom cover 4, and the fourth through hole 421 is formed in the second sealing plug 42, and the wire extending from the motor extends into the bottom cover 4 and is wound on the second terminal end 24 through the fourth through hole 421. The diameter of the fourth through hole 421 is smaller than the diameter of the wire, so as to ensure that the wire is sealed by the second sealing plug 42.

[0056] As shown in Figure 5 , after the terminal post 2 is wired, the insulating plate 1 with the terminal post 2 is fixed on the seat body 5 by bolts.

[0057] As shown in Figure 2 , Figure 3 , Figure 5 , Figure 10 , Figure 11As shown, in order to ensure the good sealing around the outlet box, the joint surface between the seat body 5 and the insulating plate 1 is provided with a multi-stage sealing structure, which includes a profiled sealing strip 8, and the upper surface of the seat body 5 and the lower surface of the insulating plate 1 are respectively provided with a third sealing groove 51 and a fourth sealing groove, the profiled sealing strip 8 includes at least three continuous and concentric stepped protrusions, the third sealing groove 51 and the fourth sealing groove are buckled to at least partially wrap the profiled sealing strip 8, and the wrapped profiled sealing strip 8 part can completely fill the third sealing groove 51 and the fourth sealing groove, forming a plurality of continuous sealing barriers with height difference, and the pressure and energy will be attenuated every time a sealing barrier is broken, greatly extending the leakage path, and the medium leakage path is not a straight line, but must climb the steps many times, which can maximize prevent the risk of leakage around the outlet box.

[0058] Preferably, the profiled sealing strip 8 is made of a polymer material with good elasticity, such as silicone rubber and fluororubber.

[0059] As shown in the drawings, Figures 1-3 The box body 6 and the seat body 5 are detachably fixed and installed through a circle of bolt mounting holes around them, and the first sealing gasket 61 is arranged on the mounting surface between the box body 6 and the seat body 5.

[0060] In addition, it also includes a box cover 7, which is detachably installed above the box body 6, and the second sealing gasket 71 is arranged on the mounting surface between the box cover 7 and the box body 6.

[0061] The first sealing gasket 61 and the second sealing gasket 71 can effectively prevent the risk of water and dust entering from the outside.

[0062] The detachable connection of the insulating compression cover 3 with the insulating plate 1, the box body 6 with the seat body 5, and the box cover 7 with the box body 6 facilitates the disassembly of the motor outlet box and also facilitates the motor wiring.

[0063] As shown in the drawings, Figure 1 , Figure 3 In order to adjust the pressure in the box body 6, the box body 6 is provided with a breathable mesh 62 on the side surface for balancing the pressure in the box body 6.

[0064] As shown in the drawings, Figure 1 , Figure 3 , Figure 5 The seat body 5 is also provided with a navigation plug 52 on the side surface for installation of a temperature measuring line in the motor.

[0065] As shown in the drawings, Figures 1-3 The box body 6 is provided with a filler funnel 63, and the external cable enters from the filler funnel 9 and is connected to the first wiring terminal 23.

[0066] In the description of the application, it should be understood that the terms "first", "second" are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0067] 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 fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. 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.

[0068] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature, can be the first feature directly above or obliquely above the second feature, or only indicate that the first feature is higher than the second feature in horizontal height. The first feature "below", "under" and "under" the second feature, can be the first feature directly below or obliquely below the second feature, or only indicate that the first feature is lower than the second feature in horizontal height.

[0069] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" means 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 appropriate manner in any one or more embodiments or examples. In addition, 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.

[0070] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and cannot be construed as limiting the present application, and those skilled in the art can modify, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A motor outlet box, characterized in that, It includes a base (5) installed on the motor housing, a box (6) supported on the base (5), an insulating plate (1) disposed at the bottom of the box (6) and detachably fixed to the base (5), and multiple terminal block units sealed through the insulating plate (1); The terminal block unit includes a terminal block (2) with different diameter portions in the axial direction and an insulating clamping cover (3) that presses the terminal block (2) into the insulating plate (1). The insulating plate (1) has a stepped hole that mates with the terminal block unit, and a sealing structure is provided on the mating surface where the stepped hole abuts the terminal block (2).

2. The motor outlet box according to claim 1, characterized in that, The terminal block (2) includes a pressure-bearing part (21) and a mounting part (22) for connection. The diameter of the pressure-bearing part (21) is larger than the diameter of the mounting part (22), and the pressure-bearing part (21) is located above the mounting part (22). The stepped hole includes a first hole (11) and a second hole (12) that are connected. The diameter of the first hole (11) is larger than the diameter of the second hole (12). The first hole (11) is located above the second hole (12). The mating surfaces of the stepped hole and the terminal (2) include the first mating surface formed by the bottom surface of the pressure-bearing part (21) and the bottom surface of the first hole (11) when the terminal (2) is located in the insulating plate (1), and the second mating surface formed by the bottom surface of the mounting part (22) and the bottom surface of the second hole (12); The sealing structure includes a first sealing structure disposed on the first mating surface and a second sealing structure disposed on the second mating surface; When the insulating clamping cover (3) presses the terminal (2) into the insulating plate (1), the first sealing structure and the second sealing structure are radially deformed by the compression of the first mating surface and the second mating surface respectively to tightly fill the gap between the terminal (2) and the insulating plate (1).

3. The motor outlet box according to claim 2, characterized in that, The side of the mounting part (22) is machined with at least two parallel planes. The inner contour of the second hole (12) is adapted to the outer contour of the mounting part (22) to form an anti-rotation structure, so that the mounting part (22) can be inserted into the second hole (12) but cannot rotate in the second hole (12).

4. The motor outlet box according to claim 2, characterized in that, A chamfer (211) is provided on the upper edge of the pressure-bearing part (21), and a wedge-shaped protrusion (31) is provided on the inner center of the insulating pressure cover (3), which can fit together with the chamfer (211). The insulating clamping cover (3) and the insulating plate (1) are connected by threads. As the insulating clamping cover (3) is continuously screwed into the insulating plate (1), the wedge-shaped protrusion (31) and the chamfer (211) fit tightly together to form a pressure bearing surface. The pressure bearing surface decomposes the force applied by the insulating clamping cover (3) to the terminal (2) into a downward clamping force and a circumferential constraint force. The clamping force causes the first sealing structure and the second sealing structure to undergo radial deformation. The constraint force causes the insulating clamping cover (3) to hug the terminal (2) and generate static friction between the terminal (2) to restrict the rotation of the terminal (2).

5. The motor outlet box according to claim 2, characterized in that, A first terminal (23) is connected above the pressure-bearing part (21). A first through hole (32) is opened in the center of the insulating compression cover (3). A first sealing plug (33) is provided in the first through hole (32). A second through hole (331) is opened in the first sealing plug (33). The wire wound around the first terminal (23) extends out of the insulating compression cover (3) from the second through hole (331). The diameter of the second through hole (331) is smaller than the diameter of the wire.

6. The motor outlet box according to claim 2, characterized in that, The mounting part (22) is connected to a second terminal (24) below. The bottom cover (4) is provided at the second terminal (24) on the lower part of the insulating plate (1). The bottom cover (4) is detachably connected to the lower part of the insulating plate (1). A third through hole (41) is provided in the center of the bottom cover (4). The diameter of the third through hole (41) is greater than or equal to the diameter of the second terminal (24). A second sealing plug (42) is embedded in the bottom cover (4). A fourth through hole (421) is provided in the second sealing plug (42). The wire extending from the motor extends into the bottom cover (4) through the fourth through hole (421) and wraps around the second terminal (24). The diameter of the fourth through hole (421) is smaller than the diameter of the wire.

7. The motor outlet box according to claim 1, characterized in that, The joint surface between the base (5) and the insulating plate (1) is provided with a multi-stage sealing structure; The multi-stage sealing structure includes a shaped sealing strip (8), and an annular third sealing groove (51) and a fourth sealing groove are respectively opened on the upper surface of the seat (5) and the lower surface of the insulating plate (1). The shaped sealing strip (8) includes at least three continuous, concentric stepped protrusions. After the third sealing groove (51) and the fourth sealing groove are engaged, they at least partially wrap the shaped sealing strip (8), and the wrapped shaped sealing strip (8) can completely fill the third sealing groove (51) and the fourth sealing groove.

8. The motor outlet box according to claim 1, characterized in that, A first sealing gasket (61) is provided on the mounting surface between the box body (6) and the base body (5).

9. The motor outlet box according to claim 1, characterized in that, It also includes a lid (7), which is detachably installed on top of the box body (6), and a second sealing gasket (71) is provided on the mounting surface between the lid (7) and the box body (6).

10. The motor terminal box according to claim 1, characterized in that, A breathable mesh (62) is installed on the side of the box (6) to balance the pressure inside the box (6).

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