Junction box device for motor and motor

Abstract

The utility model discloses a junction box device used for a motor and the motor, and relates to the junction box technology field, the junction box device used for the motor comprises a junction box body, a cover body and a sealing member, the cover body is arranged on one side of an open end of the junction box body, the cover body is connected with the junction box body and covers the open end of the junction box body, and the sealing member is arranged on the junction box body. An extrusion boss is formed on the surface, facing the junction box body, of the cover body, at least part of the sealing part is arranged between the junction box body and the cover body, an assembly groove is formed in the surface, facing the cover body, of the sealing part, and at least part of the extrusion boss is assembled in the assembly groove and abuts against the sealing part. According to the junction box device for the motor, the installation mode of the sealing element is simple, the sealing performance of connection between the cover body and the junction box body can be enhanced, the sealing effect of the junction box device is ensured, the probability that the motor breaks down can be reduced, and the cost can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of junction box technology, and in particular to a junction box device for an electric motor and an electric motor. Background Technology

[0002] In related technologies, with the increasing demand for electric drives, the requirements for the insulation of motors are also becoming more stringent. Therefore, a sealing ring groove is typically provided on the mating surface of the motor terminal box, and the sealing ring is installed within the groove to seal the terminal box and ensure the motor's insulation. However, the sealing rings in existing motor terminal boxes often detach from the groove due to improper installation, leading to problems such as sealing ring deformation and aging. This results in gaps at the mating surface of the terminal box, affecting the motor's sealing performance and causing insulation failure. Utility Model Content

[0003] This utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this utility model is to provide a junction box device for an electric motor, which has a simple sealing installation method, enhances the sealing performance between the cover and the junction box body, ensures the sealing effect of the junction box device, helps reduce the probability of motor failure, and also helps reduce costs.

[0004] This utility model also proposes an electric motor using the above-mentioned junction box device.

[0005] A junction box device for an electric motor according to a first aspect of the present invention includes: a junction box body, a cover, and a sealing member. The cover is located on one side of the open end of the junction box body, the cover is connected to the junction box body and covers the open end of the junction box body, a pressing boss is formed on the surface of the cover facing the junction box body, at least a portion of the sealing member is disposed between the junction box body and the cover, a mounting groove is formed on the surface of the sealing member facing the cover, and at least a portion of the pressing boss is fitted into the mounting groove and abuts against the sealing member.

[0006] According to the embodiments of this application, a junction box device for an electric motor includes a seal that can be sandwiched between a cover and a junction box body. A pressing boss can press the seal to seal the junction box device. The seal installation method is simple, enhancing the sealing performance between the cover and the junction box body, ensuring the sealing effect of the junction box device, and helping to reduce the probability of motor failure. Furthermore, even when the seal exhibits aging or deformation, it can still effectively seal the junction box device. As long as the seal does not break, it does not need to be replaced, thus reducing costs.

[0007] According to some embodiments of the present invention, the junction box includes: a side wall and a bottom wall, the side wall being annular, and the side wall being arranged around the edge of the bottom wall to define a mounting groove having the open end, the cover being connected to the side wall, the extrusion boss corresponding to the side wall, and at least a portion of the seal being disposed between the side wall and the cover.

[0008] According to some embodiments of the present invention, both the sealing element and the extrusion boss are annular, both extending circumferentially along the sidewall of the box, and the assembly groove is annular and extends circumferentially along the sidewall of the box.

[0009] According to some embodiments of the present invention, the surface of the cover facing the junction box body is further formed with an inner skirt protrusion, the inner skirt protrusion extends into the mounting groove and is spaced apart from the side wall of the box, and the sealing member has a sealing edge, the sealing edge being located between the inner skirt protrusion and the side wall of the box to seal the gap between the inner skirt protrusion and the side wall of the box.

[0010] According to some embodiments of the present invention, both the inner skirt boss and the sealing edge are annular, and both the inner skirt boss and the sealing edge extend circumferentially along the side wall of the box.

[0011] According to some embodiments of the present invention, the sealing edge extends into the mounting groove, and the sealing edge forms an angle with the arrangement direction of the cover and the junction box.

[0012] According to some embodiments of the present invention, a positioning boss is formed at the end of the box sidewall away from the box bottom wall. The positioning boss is spaced apart from the inner sidewall of the box sidewall, and the sealing member is located inside the positioning boss and abuts against the positioning boss.

[0013] According to some embodiments of the present invention, a first guide slope is formed on the inner side of the extrusion boss, and a second guide slope is formed on the outer side of the extrusion boss. From the direction of the extrusion boss near the cover to away from the cover, the first guide slope is inclined toward the second guide slope, and the second guide slope is inclined toward the first guide slope. Both the first guide slope and the second guide slope extend to the end of the extrusion boss away from the cover.

[0014] According to some embodiments of the present invention, an outer skirt protrusion is further formed on the surface of the cover facing the junction box body, and the outer skirt protrusion is located on the outside of the side wall of the box and abuts against the side wall of the box.

[0015] The electric motor according to a second aspect of the present invention includes the junction box device described in the above embodiments.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a partial schematic diagram of a junction box device for an electric motor according to an embodiment of this application.

[0019] Figure label:

[0020] Junction box device 1,

[0021] Junction box body 10, box side wall 11, positioning boss 111, box bottom wall 12, mounting groove 13.

[0022] Cover 20, extrusion boss 21, first guide slope 211, second guide slope 212, inner skirt boss 22, outer skirt boss 23.

[0023] Seal 30, assembly groove 31, sealing edge 32

[0024] First mounting hole 41, second mounting hole 42, fixing bolt 43. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] The following is for reference. Figure 1 This invention describes a junction box device 1 for an electric motor according to an embodiment of the present invention. The junction box device 1 can be applied to an electric motor, but the present invention is not limited thereto. The junction box device 1 can also be applied to other equipment that requires the junction box device 1. This application uses the application of the junction box device 1 to an electric motor as an example for description.

[0027] According to the first aspect of the present invention, a junction box device 1 for an electric motor, such as... Figure 1As shown, the junction box device 1 may include: a junction box body 10, a cover 20, and a seal 30. The cover 20 is located on one side of the open end of the junction box body 10. The cover 20 is connected to the junction box body 10 and covers the open end of the junction box body 10. A pressing boss 21 is formed on the surface of the cover 20 facing the junction box body 10. At least a portion of the seal 30 is disposed between the junction box body 10 and the cover 20. A mounting groove 31 is formed on the surface of the seal 30 facing the cover 20. At least a portion of the pressing boss 21 is mounted in the mounting groove 31 and abuts against the seal 30.

[0028] It should be noted that in related technologies, a sealing ring groove is typically provided on the mating surface of the motor terminal box. The sealing ring is installed in the sealing ring groove to seal the motor terminal box and thus ensure the insulation of the motor. However, the sealing ring of existing motor terminal boxes often comes out of the sealing ring groove due to improper installation, resulting in problems such as sealing ring deformation and aging. This causes gaps at the mating surface of the motor terminal box, affecting the motor's sealing performance and leading to motor insulation failure.

[0029] Based on this, this application provides a junction box device 1 for an electric motor. The cover 20 and the junction box body 10 can be arranged along a first direction. This application takes the first direction as the height direction of the junction box device 1 and describes the junction box device 1 as placed in a vertical direction. When the junction box device 1 is as follows... Figure 1 When setting the direction, the first direction is Figure 1 In the Z-direction of the junction box assembly 1, the junction box body 10 can open towards its upper end along the height direction of the junction box assembly 1. The cross-sectional shape of the cover 20 can be the same as that of the junction box body 10, and the cover 20 can be fitted and assembled with the junction box body 10. The cover 20 is located on one side of the open end of the junction box body 10, and the cover 20 can cover the open end of the junction box body 10. The cover 20 can be connected to the junction box body 10 by means of snap-fit, bolt connection, etc., and the cover 20 can close the junction box body 10. A pressing boss 21 can be formed on the surface of the cover 20 facing the junction box body 10. When the cover 20 is fitted and assembled with the junction box body 10, the pressing boss 21 protrudes towards the junction box body 10 along the height direction of the junction box assembly 1, and the pressing boss 21 can extend circumferentially along the cover 20. The pressing boss 21 can be welded to the cover 20, and the pressing boss 21 can be integrally formed with the cover 20.

[0030] The sealing element 30 can be made of materials such as rubber or silicone, which have good elasticity, high temperature resistance, low temperature resistance, corrosion resistance, and oxidation resistance. The sealing element 30 can undergo elastic deformation after being compressed. At least a portion of the sealing element 30 is located between the cover 20 and the junction box 10, and the sealing element 30 can enhance the sealing performance of the connection between the cover 20 and the junction box 10. When at least a portion of the sealing element 30 is located between the cover 20 and the junction box 10, the portion of the sealing element 30 located between the cover 20 and the junction box 10 forms an assembly groove 31. The assembly groove 31 is located on the surface of the sealing element 30 facing the cover 20, and along the height direction of the junction box device 1, the assembly groove 31 opens towards the cover 20. The longitudinal cross-sectional shape of the assembly groove 31 can be an inverted triangle. The assembly groove 31 can be used to mate with the extrusion boss 21. At least a portion of the extrusion boss 21 can be assembled into the assembly groove 31, and the extrusion boss 21 can abut against the sealing element 30. The sealing element 30 can be mounted on the end face of the junction box 10 facing the cover 20. The mounting groove 31 of the sealing element 30 can be correspondingly set with the extrusion boss 21 of the cover 20. The extrusion boss 21 can extend into the mounting groove 31 and extrude the sealing element 30. The sealing element 30 can be sandwiched between the cover 20 and the junction box 10. The method of installing the sealing element 30 between the cover 20 and the junction box 10 is simple.

[0031] When the cover 20 is assembled with the junction box 10, at least a portion of the pressing boss 21 is fitted into the mounting groove 31. When the cover 20 is pressed down, the pressing boss 21 can extend into the mounting groove 31 and press the seal 30, causing the seal 30 to deform. The seal 30 can fill the gap between the cover 20 and the junction box 10, and the cover 20 and the junction box 10 are fixedly connected. This allows the pressing boss 21 to continuously press the seal 30, ensuring that the deformed seal 30 always fills the gap between the cover 20 and the junction box 10, which helps improve the sealing effect of the junction box device 1. Furthermore, when the seal 30 ages and deforms, the cover 20 can continue to press the seal 30 down. By reducing the distance between the cover 20 and the junction box 10, the seal 30 can continue to fill the gap between the cover 20 and the junction box 10. As long as the seal 30 does not break, it does not need to be replaced, which helps reduce costs. As an example, when the cover 20 and the junction box 10 are connected by bolts, the seal 30 ages and deforms. The seal 30 can be pressed down further, and the fixing bolt 43 can be tightened further. The gap between the cover 20 and the junction box 10 is reduced by increasing the part of the fixing bolt 43 that mates with the junction box 10.

[0032] As an example, the cover 20 and the junction box 10 can be connected by fixing bolts 43. The cover 20 can have a first mounting hole 41 that extends through it along its thickness. The junction box 10 can have a second mounting hole 42 that extends along its height. The first mounting hole 41 can be a through hole, and the second mounting hole 42 can be a threaded hole. The fixing bolts 43 can pass through the first mounting hole 41 and mate with the second mounting hole 42, thereby achieving a fixed connection between the cover 20 and the junction box 10, ensuring that the seal 30 is always pressed between the cover 20 and the junction box 10. There can be multiple first mounting holes 41, which can be evenly distributed circumferentially around the cover 20. Similarly, there can be multiple second mounting holes 42, which can also be evenly distributed circumferentially around the cover 20. Multiple first mounting holes 41 can be correspondingly set with multiple second mounting holes 42. Each first mounting hole 41 has a corresponding second mounting hole 42. There can be multiple fixing bolts 43. Each fixing bolt 43 can pass through the corresponding first mounting hole 41 and cooperate with the corresponding second mounting hole 42 for assembly. By setting multiple first mounting holes 41, multiple second mounting holes 42 and multiple fixing bolts 43, it is beneficial to improve the connection strength between the cover 20 and the junction box 10, thereby improving the connection reliability between the cover 20 and the junction box 10.

[0033] In this embodiment, at least a portion of the seal 30 can be sandwiched between the cover 20 and the junction box 10. The extrusion boss 21 can compress the seal 30 to seal the junction box device. The seal 30 is easy to install and enhances the sealing performance between the cover 20 and the junction box 10, ensuring the sealing effect of the junction box device 1 and reducing the probability of motor failure. Furthermore, even when the seal 30 experiences aging or deformation, it can still effectively seal the junction box device 1. As long as the seal 30 does not break, it does not need to be replaced, which helps reduce costs.

[0034] In some embodiments of the present invention, the junction box 10 may include: a side wall 11 and a bottom wall 12. The side wall 11 is annular and is arranged around the edge of the bottom wall 12 to define a mounting groove 13 with an open end. The cover 20 is connected to the side wall 11. The extrusion boss 21 corresponds to the side wall 11. At least a portion of the sealing member 30 is disposed between the side wall 11 and the cover 20.

[0035] The side wall 11 of the box can be constructed as a ring, and can be arranged around the edge of the bottom wall 12 of the box, extending circumferentially along the bottom wall 12. The side wall 11 can be fixedly connected to the bottom wall 12 of the box by means of snap-fit, bolt connection, etc. The side wall 11 and the bottom wall 12 can be integrally formed, and the side wall 11 and the bottom wall 12 together define a mounting groove 13, which is open towards the side facing the cover 20. The second mounting hole 42 can be located on the side wall 11, and when the cover 20 is connected to the junction box 10 by fixing bolts 43, the cover 20 is connected to the side wall 11. Along the height direction of the junction box assembly 1, the extrusion boss 21 is correspondingly provided with the side wall 11 of the box. At least a portion of the sealing element 30 is provided between the side wall 11 of the box and the cover 20. The sealing element 30 can be placed on the end face of the side wall 11 facing the cover 20, so that at least a portion of the extrusion boss 21 can be assembled in the assembly groove 31 of the sealing element 30. After being extruded, the sealing element 30 can fill the gap between the side wall 11 of the box and the cover 20, thereby satisfying the sealing effect of the junction box 10.

[0036] In some embodiments of this utility model, the sealing element 30 and the extrusion boss 21 are both annular, and both the sealing element 30 and the extrusion boss 21 extend circumferentially along the side wall 11 of the box. The assembly groove 31 is annular and extends circumferentially along the side wall 11 of the box.

[0037] The seal 30 and the extrusion boss 21 can both be constructed as annular. Both the seal 30 and the extrusion boss 21 can extend circumferentially along the side wall 11 of the junction box. The cross-sectional shape of the seal 30 is the same as that of the extrusion boss 21, and the shape of the seal 30 can be adapted to the shape of the extrusion boss 21, allowing the seal 30 to mate with the extrusion boss 21. The seal 30 and the extrusion boss 21 are correspondingly arranged along the height direction of the junction box device 1. The mounting groove 31 can be constructed as annular, and the cross-sectional dimensions of the mounting groove 31 can be adapted to the cross-sectional dimensions of the extrusion boss 21, allowing the extrusion boss 21 to extend into the mounting groove 31. The extrusion boss 21 can abut and limit contact with the inner wall of the mounting groove 31, and the extrusion boss 21 and the seal 30 mate with each other.

[0038] In some embodiments of this utility model, the surface of the cover 20 facing the junction box 10 is further provided with an inner skirt boss 22. The inner skirt boss 22 extends into the mounting groove 13 and is spaced apart from the side wall 11 of the box. The sealing member 30 has a sealing edge 32, which is located between the inner skirt boss 22 and the side wall 11 of the box to seal the gap between the inner skirt boss 22 and the side wall 11 of the box.

[0039] An inner skirt protrusion 22 is formed on the surface of the cover 20 facing the junction box 10. Along the height direction of the junction box assembly 1, the inner skirt protrusion 22 extends towards the bottom wall 12 of the box. The inner skirt protrusion 22 can form an angle with the surface of the cover 20 facing the junction box 10; the angle can be a right angle or a near-right angle. The inner skirt protrusion 22 can be radially spaced from the pressing protrusion 21 of the cover 20. The pressing protrusion 21 surrounds the inner skirt protrusion 22, and the inner skirt protrusion 22 is located inside the pressing protrusion 21 along the radial direction of the cover 20. When the cover 20 is assembled with the junction box 10, the inner skirt protrusion 22 can extend into the mounting groove 13, and the inner skirt protrusion 22 is spaced apart from the side wall 11 of the box.

[0040] The seal 30 has a sealing edge 32. Along the radial direction of the seal 30, the sealing edge 32 is located inside the seal 30. Along the thickness direction of the seal 30, the sealing edge 32 can protrude from the seal 30 towards the side opposite to the mounting groove 31. When the cover 20 is assembled with the junction box body 10, the sealing edge 32 can extend into the mounting groove 13, and the inner skirt boss 22 can extend into the inside of the seal 30 and abut against the sealing edge 32. The sealing edge 32 can be located between the inner skirt boss 22 and the box side wall 11. The sealing edge 32 can abut against the inner side wall of the box side wall 11 and the outer side wall of the inner skirt boss 22, sealing the gap between the inner skirt boss 22 and the box side wall 11. It should be noted that, along the radial direction of the junction box body 10, the side closer to the center of the junction box body 10 is the inner side, and the side farther from the center of the junction box body 10 is the outer side.

[0041] As an example, the sealing edge 32 can extend obliquely towards the bottom wall 12 of the box from the cover 20 to the junction box 10. The inner surface of the sealing edge 32 may not be parallel to the first direction. The distance between the inner surface of the sealing edge 32 and the side wall 11 of the box can gradually increase along the direction from the cover 20 to the junction box 10. The distance between the extrusion boss 21 and the inner skirt boss 22 can be greater than the width of the seal 30 located between them. When a portion of the extrusion boss 21 is assembled into the mounting groove 31, it facilitates the inner skirt boss 22 extending downwards into the mounting groove 13, and the sealing edge 32 does not obstruct the inner skirt boss 22. When installing the cover 20, precise alignment of the cover 20 and the seal 30 is not required; the extrusion boss 21 can compress the seal 30, thereby filling the gap between the cover 20 and the junction box 10. The cover 20 installation is simple and improves installation efficiency.

[0042] In some embodiments of this utility model, the inner skirt boss 22 and the sealing edge 32 are both annular, and both the inner skirt boss 22 and the sealing edge 32 extend circumferentially along the side wall 11 of the box.

[0043] The cross-sectional shape of the inner skirt boss 22 can be adapted to the cross-sectional shape of the sealing edge 32. Furthermore, the cross-sectional shape of the inner skirt boss 22 can be the same as the cross-sectional shape of the sealing edge 32. Both the inner skirt boss 22 and the sealing edge 32 can be constructed as annular. The shape of the inner skirt boss 22 can be adapted to the shape of the sealing edge 32. Both the inner skirt boss 22 and the sealing edge 32 extend circumferentially along the side wall 11 of the box. The radial dimension of the inner skirt boss 22 can be smaller than the radial dimension of the sealing edge 32, so that the inner skirt boss 22 can abut against the inner wall of the sealing edge 32. When the cover 20 is connected to the junction box 10, the sealing edge 32 is sandwiched between the inner skirt boss 22 and the side wall 11 of the box, sealing the gap between the inner skirt boss 22 and the side wall 11 of the box, thus achieving a circumferential seal.

[0044] In some embodiments of this utility model, the sealing edge 32 extends into the mounting groove 13, and the sealing edge 32 forms an angle with the arrangement direction of the cover 20 and the junction box 10.

[0045] When the cover 20 is assembled with the junction box 10, the sealing edge 32 extends into the mounting groove 13. The sealing edge 32 can be located between the inner skirt boss 22 and the box side wall 11, and can seal the gap between the inner skirt boss 22 and the box side wall 11. The sealing edge 32 forms an angle with the arrangement direction of the cover 20 and the junction box 10 (i.e., the height direction of the junction box device 1), and the angle can be acute. From the cover 20 to the junction box 10, the distance between the inner side of the sealing edge 32 and the box side wall 11 along the radial direction can gradually increase. When the seal 30 is installed on the junction box 10, and the pressing boss 21 is assembled in the mounting groove 31 but does not press the seal 30, the sealing edge 32 can have a gap with the outer side wall of the inner skirt boss 22, which facilitates the inner skirt boss 22 to extend into the sealing groove and facilitates the cooperation between the inner skirt boss 22 and the sealing edge 32. The sealing edge 32 will not hinder the downward movement of the inner skirt boss 22, which is beneficial to improving the assembly efficiency of the cover 20.

[0046] In some embodiments of this utility model, a positioning boss 111 is formed at the end of the box side wall 11 away from the box bottom wall 12. The positioning boss 111 is spaced apart from the inner side wall of the box side wall 11, and the sealing member 30 is located inside the positioning boss 111 and abuts against the positioning boss 111.

[0047] The positioning boss 111 is located at the end of the side wall 11 away from the bottom wall 12. The positioning boss 111 can be integrally formed with the side wall 11. The positioning boss 111 and the inner side wall of the side wall 11 are radially spaced apart along the junction box body 10. When the sealing element 30 is located at the end of the side wall 11, the sealing element 30 is located inside the positioning boss 111. The sealing element 30 can abut against the positioning boss 111. The positioning boss 111 can position the sealing element 30. The positioning boss 111 can limit the sealing element 30 to move outward along the radial direction of the junction box body 10.

[0048] When the seal 30 is located at the end of the side wall 11 of the box, the sealing edge 32 can abut against the side wall 11, and the positioning boss 111 can abut against the seal 30. The positioning boss 111 and the sealing edge 32 can serve to position and install the seal 30. When the cover 20 is assembled with the junction box 10, the inner skirt boss 22 can extend into the inside of the seal 30 and abut against the sealing edge 32. The inner skirt boss 22 can restrict the seal 30 from moving radially toward the inside of the junction box 10. Therefore, it is not necessary to place the seal 30 in an absolutely precise position, but it can be placed in a position that corresponds to the pressing boss 21. The positioning boss 111 and the sealing edge 32 can restrict the seal 30 from moving outward along the radial direction of the junction box 10, and the inner skirt boss 22 can restrict the seal 30 from moving inward along the radial direction of the junction box 10, thereby confining the seal 30 between the positioning boss 111 and the inner skirt boss 22.

[0049] When assembling the seal 30, it is not necessary to place the seal 30 with absolute precision. After the cover 20 is closed, the inner skirt boss 22 and the positioning boss 111 limit the seal 30 radially along the junction box body 10. The pressing boss 21 is assembled into the assembly groove 31, and the seal 30 can return to the correct position under the pressure of the pressing boss 21. As the cover 20 continues to be pressed down, the seal 30 fills the gap between the cover 20 and the junction box body 10. As the cover 20 is pressed down, the inner skirt boss 22 will press the sealing edge 32, thereby sealing the gap between the inner skirt boss 22 and the box side wall 11, thus further improving the sealing performance between the cover 20 and the junction box body 10.

[0050] In some embodiments of this utility model, the positioning boss 111 is adjacent to the outer side wall of the box side wall 11, and the positioning boss 111 is annular and extends circumferentially along the box side wall 11.

[0051] The positioning boss 111 is adjacent to the outer wall of the box sidewall 11. The outer wall of the positioning boss 111 can be coplanar with the outer wall of the box sidewall 11, which helps to improve the integrity of the box sidewall 11 and the positioning boss 111, and improves the sealing performance between the cover 20 and the junction box 10. The positioning boss 111 can be constructed as a ring, and the positioning boss 111 can extend circumferentially along the box sidewall 11, so that the positioning boss 111 can always abut against the seal 30 along the circumference of the box sidewall 11, thereby playing a positioning role for the seal 30. As an example, the side of the positioning boss 111 that abuts against the seal 30 can be constructed as a slope. If the seal 30 is not installed in place, and part of the structure of the seal 30 falls on the slope, the sloped side will not hinder the movement of the seal 30, thus facilitating the return of the seal 30 to the correct position. When the cover 20 is installed, at least a portion of the extrusion boss 21 is fitted into the assembly groove 31. The extrusion boss 21 extrudes the seal 30, allowing the seal 30 to move relative to the inclined surface of the positioning boss 111. The seal 30 can move radially inward along the junction box 10, thereby allowing the seal 30 to return to its correct position under the pressure of the extrusion boss 21. Furthermore, the side of the positioning boss 111 facing the seal 30 is constructed with an inclined surface, which facilitates the machining of the positioning boss 111 and improves the production efficiency of the junction box 10.

[0052] Multiple second mounting holes 42 can be located on the positioning boss 111. Multiple second mounting holes 42 can be evenly distributed along the circumference of the positioning boss 111. When the fixing bolt 43 passes through the cover 20 and is connected to the junction box 10, the sealing element 30 can be spaced apart from the fixing bolt 43, or the sealing element 30 can fill the gap between the fixing bolt 43 and the extrusion boss 21.

[0053] In some embodiments of this utility model, such as Figure 1 As shown, a first guide slope 211 is formed on the inner side of the extrusion boss 21, and a second guide slope 212 is formed on the outer side of the extrusion boss 21. From the direction of the extrusion boss 21 near the cover 20 to away from the cover 20, the first guide slope 211 is inclined toward the second guide slope 212, and the second guide slope 212 is inclined toward the first guide slope 211. Both the first guide slope 211 and the second guide slope 212 extend to the end of the extrusion boss 21 away from the cover 20.

[0054] The extrusion boss 21 has an inner side and an outer side that are radially opposite to each other along the cover body 20. A first guide slope 211 is formed on the inner side of the extrusion boss 21, and a second guide slope 212 is formed on the outer side of the extrusion boss 21. The first guide slope 211 can be located inside the second guide slope 212. It should be noted that, along the radial direction of the cover body 20, the side of the extrusion boss 21 facing the inner skirt boss 22 is the inner side, and the side of the extrusion boss 21 away from the inner skirt boss 22 is the outer side. From the direction the extrusion boss 21 is close to the cover body 20 to the direction it is far from the cover body 20, the distance between the first guide slope 211 and the second guide slope 212 gradually decreases. The first guide slope 211 is inclined towards the second guide slope 212, and the second guide slope 212 is inclined towards the first guide slope 211.

[0055] As an example, when the cover 20 is placed in a vertical direction, i.e., the first direction is the height direction of the cover 20, the first guide slope 211 can extend obliquely along the first direction, forming an angle with the first direction, which can be an acute angle. The second guide slope 212 can also extend obliquely along the first direction, forming an angle with the first direction, which can also be an acute angle. The angle between the first guide slope 211 and the first direction can be equal to the angle between the second guide slope 212 and the first direction.

[0056] Both the first guide slope 211 and the second guide slope 212 can extend to the end of the extrusion boss 21 away from the cover 20, and the first guide slope 211 and the second guide slope 212 can be connected at the end of the extrusion boss 21 away from the cover 20. The first guide slope 211 and the second guide slope 212 can play a guiding role, allowing at least a portion of the extrusion boss 21 to extend into the assembly groove 31, and at least a portion of the extrusion boss 21 can abut against the seal 30. If the extrusion boss 21 and the seal 30 are misaligned, the seal 30 can be installed in place under the action of the first guide slope 211 and the second guide slope 212, thereby achieving the effect of automatic alignment of the seal 30, which can reduce the requirement for the accuracy of the installation position of the seal 30 and help improve the assembly efficiency of the extrusion boss 21 and the seal 30. When the cover 20 is pressed down, the seal 30 can return to the correct position under the pressure of the extrusion boss 21, so that the seal 30 can seal the gap between the cover 20 and the junction box 10.

[0057] In some embodiments of this utility model, the surface of the cover 20 facing the junction box 10 is further provided with an outer skirt protrusion 23, which is located on the outside of the side wall 11 of the box and abuts against the side wall 11 of the box.

[0058] The surface of the cover 20 facing the junction box 10 also has an outer skirt protrusion 23. The outer skirt protrusion 23 extends circumferentially along the cover 20 and is perpendicular to the surface of the cover 20 facing the junction box 10. The outer skirt protrusion 23 can be spaced apart from the inner skirt protrusion 22 along the radial direction of the cover 20. A pressing protrusion 21 is located between the inner skirt protrusion 22 and the outer skirt protrusion 23, and the pressing protrusion 21 is spaced apart from both the inner skirt protrusion 22 and the outer skirt protrusion 23. When the cover 20 and the junction box 10 are assembled, the outer skirt protrusion 23 can be located on the outside of the box sidewall 11, and the outer skirt protrusion 23 can abut against the outer sidewall of the box sidewall 11, thereby achieving the effect of sealing the junction box 10. In addition, the outer skirt protrusion 23 can also prevent liquid from entering the gap between the cover 20 and the junction box 10.

[0059] The electric motor according to a second aspect of the present invention includes the junction box device 1 in the above embodiment.

[0060] According to the embodiments of this application, the use of the junction box device 1 in the above embodiments can reduce the probability of insulation failure of the motor and improve the safety of motor operation.

[0061] The junction box device 1 and other components and operations of the motor according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0062] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0063] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A junction box device for an electric motor, characterized in that, include: Junction box (10); The cover (20) and the seal (30) are provided. The cover (20) is located on one side of the open end of the junction box (10). The cover (20) is connected to the junction box (10) and covers the open end of the junction box (10). The surface of the cover (20) facing the junction box (10) has a pressing boss (21). At least a portion of the seal (30) is provided between the junction box (10) and the cover (20). The surface of the seal (30) facing the cover (20) has an assembly groove (31). At least a portion of the pressing boss (21) is assembled in the assembly groove (31) and abuts against the seal (30).

2. The junction box device according to claim 1, characterized in that, The junction box (10) includes a side wall (11) and a bottom wall (12). The side wall (11) is annular and is arranged around the edge of the bottom wall (12) to define a mounting groove (13) having the open end. The cover (20) is connected to the side wall (11). The extrusion boss (21) corresponds to the side wall (11). At least a portion of the seal (30) is disposed between the side wall (11) and the cover (20).

3. The junction box device according to claim 2, characterized in that, The seal (30) and the extrusion boss (21) are both annular, and both the seal (30) and the extrusion boss (21) extend circumferentially along the side wall (11) of the box. The assembly groove (31) is annular and extends circumferentially along the side wall (11) of the box.

4. The junction box device according to claim 2 or 3, characterized in that, The surface of the cover (20) facing the junction box (10) is also formed with an inner skirt boss (22), which extends into the mounting groove (13) and is spaced apart from the side wall (11) of the box. The seal (30) has a sealing edge (32) which is located between the inner skirt boss (22) and the side wall (11) of the box to seal the gap between the inner skirt boss (22) and the side wall (11).

5. The junction box device according to claim 4, characterized in that, The inner skirt boss (22) and the sealing edge (32) are both annular, and the inner skirt boss (22) and the sealing edge (32) both extend circumferentially along the side wall (11) of the box.

6. The junction box device according to claim 4, characterized in that, The sealing edge (32) extends into the mounting groove (13), and the sealing edge (32) forms an angle with the arrangement direction of the cover (20) and the junction box (10).

7. The junction box device according to claim 2 or 3, characterized in that, A positioning boss (111) is formed at the end of the box side wall (11) away from the box bottom wall (12). The positioning boss (111) is spaced apart from the inner side wall of the box side wall (11). The sealing member (30) is located inside the positioning boss (111) and abuts against the positioning boss (111).

8. The junction box device according to claim 2 or 3, characterized in that, The inner side of the extrusion boss (21) is formed with a first guide slope (211), and the outer side of the extrusion boss (21) is formed with a second guide slope (212). From the direction of the extrusion boss (21) near the cover (20) to away from the cover (20), the first guide slope (211) is inclined toward the second guide slope (212), and the second guide slope (212) is inclined toward the first guide slope (211). Both the first guide slope (211) and the second guide slope (212) extend to the end of the extrusion boss (21) away from the cover (20).

9. The junction box device according to claim 2 or 3, characterized in that, The surface of the cover (20) facing the junction box (10) is also provided with an outer skirt protrusion (23), which is located on the outside of the side wall (11) of the box and abuts against the side wall (11).

10. An electric motor, characterized in that, Includes the junction box device (1) according to any one of claims 1-9.

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