Junction box and motor

Abstract

The embodiment of the utility model provides a junction box and a motor, the junction box comprises a junction box cover, a junction box base and a double-rib sealing gasket assembled between the junction box cover and the junction box base, the junction box cover is provided with a first clamping ring and a second clamping ring, the first clamping ring and the second clamping ring are located on different planes. The double-rib sealing gasket is provided with an outer ring convex rib and an inner ring convex rib, and the inner ring convex rib and the outer ring convex rib have different heights; the first clamping ring is matched with the outer ring convex rib, and the second clamping ring is matched with the inner ring convex rib, so that when the double-rib sealing gasket and the junction box cover are assembled, the outer ring convex rib is clamped into the first clamping ring, and the inner ring convex rib is clamped into the second clamping ring. According to the utility model, the sealing performance can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, and particularly relates to a junction box and a motor. Background Art

[0002] The junction box is a very common component in the living or production environment. For example, the motor junction box. The motor junction box is an important accessory of electrical equipment. Its main function is to connect power lines and control lines together and supply power to electrical equipment. It also has functions such as distributing line current, protecting the line, and facilitating maintenance and repair.

[0003] At present, the sealing performance of the junction box is insufficient, resulting in gaps between the junction box cover and the junction box base, and dust will enter the interior of the junction box. Summary of the Utility Model

[0004] An embodiment of the utility model provides a junction box and a motor, which can improve the sealing performance.

[0005] According to a first aspect, a junction box provided by an embodiment of the utility model includes a junction box cover, a junction box base, and a double-rib sealing gasket assembled between the junction box cover and the junction box base, wherein:

[0006] The junction box cover has a first retaining ring and a second retaining ring, and the first retaining ring and the second retaining ring are located on different planes; the double-rib sealing gasket has an outer rib and an inner rib, and the inner rib and the outer rib have different heights; the first retaining ring is adapted to the outer rib, and the second retaining ring is adapted to the inner rib, so that when the double-rib sealing gasket is assembled with the junction box cover, the outer rib is snapped into the first retaining ring, and the inner rib is snapped into the second retaining ring.

[0007] In one embodiment, the junction box cover has a first planar portion and a second planar portion. The first planar portion is a planar structure with a hollow middle, and the second planar portion is located in the hollow portion of the first planar portion. The outer edges of the second planar portion are connected to the inner edges of the first planar portion everywhere, and the second planar portion protrudes towards the top of the junction box cover relative to the first planar portion, wherein:

[0008] The first retaining ring is a circumferential flange located on the outer periphery of the first planar portion;

[0009] The second retaining ring is a circumferential step formed by the height difference between the second planar portion and the first planar portion.

[0010] In one embodiment, the junction box cover has a third planar portion, the second planar portion is a planar structure with a hollow center, the third planar portion is located in the hollow portion of the second planar portion, various locations of the outer edge of the third planar portion are connected to various locations of the outer edge of the second planar portion, and the third planar portion protrudes toward the top of the junction box cover relative to the second planar portion to increase the internal space of the junction box.

[0011] In one embodiment, the height of the inner ring convex rib is greater than the height of the outer ring convex rib, the height difference between the inner ring convex rib and the outer ring convex rib is a first height difference, and the height difference between the second plane portion and the first plane portion is a second height difference; the first height difference is greater than the second height difference, and the difference between the first height difference and the second height difference is a first preset value, so that when the double-rib sealing gasket and the junction box cover are assembled, the compression amount of the double-rib sealing gasket is the first preset value.

[0012] In one embodiment, a stop ring is provided on the junction box base, and the inner ring convex rib is sleeved on the stop ring to realize the assembly of the double-rib sealing gasket and the junction box base.

[0013] In one embodiment, the size of the stop ring is larger than the inner ring size of the inner ring rib, and the difference between the size of the stop ring and the inner ring size of the inner ring rib is a second preset value, so that the assembly of the double-rib sealing gasket and the junction box base has an interference fit of the second preset value.

[0014] In one embodiment, hole structures are provided on the junction box cover, the double-rib sealing gasket and the junction box base, and bolts are passed through the first hole structure on the junction box cover, the second hole structure on the double-rib sealing gasket and the third hole structure on the junction box base to achieve fixed connection between the junction box cover, the double-rib sealing gasket and the junction box base.

[0015] In one embodiment, the first hole structure on the junction box cover is located on the first plane portion of the junction box cover, the second hole structure on the double-rib sealing gasket is located between the outer ring rib and the inner ring rib, and the third hole structure on the junction box base is located on the outside of the stop ring.

[0016] In one embodiment, the width of the inner ring rib is greater than the width of the outer ring rib; and / or the first clamping ring and the outer ring rib are quadrilaterals, and the second clamping ring and the inner ring rib are octagonal.

[0017] According to the second aspect, the motor provided by the embodiment of the utility model includes the junction box provided by the first aspect.

[0018] The embodiments of the present utility model provide a junction box and a motor, which have at least the following technical effects individually or in combination:

[0019] (1) The first snap ring is adapted to the outer ring rib, so that the outer ring rib can be snapped into the first snap ring, realizing the snap connection between the first snap ring of the junction box cover and the outer periphery of the double-rib gasket, and realizing the first-level seal. The second snap ring is adapted to the inner ring rib, so that the inner ring rib can be snapped into the second snap ring, realizing the snap connection between the second snap ring of the junction box cover and the inner periphery of the double-rib gasket, and realizing the second-level seal. That is to say, when assembling the junction box cover and the double-rib gasket, the outer ring rib will be snapped into the first snap ring, and the inner ring rib will be snapped into the second snap ring, realizing double seals and improving the sealing effect. Moreover, the first snap ring and the second snap ring are located on different planes, that is, the plane where the first snap ring is located and the plane where the second snap ring is located are not at the same height. The inner ring rib and the outer ring rib have different heights, that is, the height of the inner ring rib and the height of the outer ring rib are different, and there is a height difference between the inner ring rib and the inner ring rib. In this way, the snap connection position between the first snap ring and the outer ring rib and the snap connection position between the second snap ring and the inner ring rib are not on the same plane, so that seals with different heights can be formed, which can further improve the sealing effect.

[0020] (2) In one embodiment, the first snap ring is a flange located on the outer periphery of the first plane portion, and the second snap ring is a step formed by the height difference between the second plane portion and the first plane portion. It can be seen that the first snap ring is formed by the height difference between the first plane portion and the flange on its outer periphery, and the second snap ring is formed by the height difference between the second plane portion and the first plane portion. That is, both the first snap ring and the second snap ring are formed by height differences, so that both the first snap ring and the second snap ring are stepped snap rings. Compared with the groove-type snap ring, the stepped snap ring is simpler to manufacture.

[0021] (3) In one embodiment, the junction box cover further has a third plane portion, and there is a height difference between the third plane portion and the second plane portion, which can increase the internal space of the junction box and provide more sufficient space for the wiring work of the junction box.

[0022] (4) In one embodiment, the height of the inner ring rib is greater than the height of the outer ring rib, and the height difference between the inner ring rib and the outer ring rib is the first height difference. The height difference between the second planar portion on the junction box cover and the first planar portion is the second height difference. The first height difference and the second height difference are not the same. Instead, the first height difference is greater than the second height difference, and the difference between the first height difference and the second height difference is a first preset value. In this way, when assembling the double-rib gasket and the junction box cover, the height difference between the inner ring rib and the outer ring rib will be compressed by the first preset value. This will cause the inner ring rib to be in tight contact with the second snap ring of the junction box cover, achieving a perfect fit and eliminating the influence of the casting deformation of the junction box cover on the sealing effect.

[0023] (5) Through the socket connection of the spigot ring and the inner ring rib, the assembly of the double-rib gasket and the junction box base is realized. It has both good sealing effect and the advantage of convenient assembly. The size of the spigot ring is smaller than the inner size of the inner ring rib. Therefore, when the inner ring rib is sleeved on the spigot ring, the inner ring rib will tightly hoop on the spigot ring, further enhancing the sealing effect.

[0024] (6) By means of the cooperation of bolts and hole structures, the junction box cover, the double-rib gasket and the junction box base are fixedly connected, increasing the firmness and reliability of the assembly. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a schematic structural diagram of a junction box cover in an embodiment of the present invention;

[0027] Figure 2 It is a schematic structural diagram of a double-rib gasket in an embodiment of the present invention;

[0028] Figure 3 It is a schematic cross-sectional view of a double-rib gasket in an embodiment of the present invention;

[0029] Figure 4 It is a schematic structural diagram of a junction box base in an embodiment of the present invention;

[0030] Figure 5 It is an exploded schematic view of a junction box in an unassembled state in an embodiment of the present invention.

[0031] Reference Numerals:

[0032] 10 Junction box cover 11 First retaining ring 12 Second retaining ring 13 First planar part 14 Second planar part 15 Third planar part 16 First hole structure 20 Double-ribbed gasket 21 Outer ring rib 22 Inner ring rib 23 Second hole structure 30 Junction box base 31 Port plane 32 Rabbet ring 33 Third hole structure 40 Bolt Detailed Implementation Manner

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0034] In a first aspect, an embodiment of the present utility model provides a junction box. Refer to Figures 1 to 5 , the junction box includes a junction box cover 10, a junction box base 30, and a double-rib sealing gasket 20 assembled between the junction box cover 10 and the junction box base 30, wherein:

[0035] The junction box cover 10 has a first retaining ring 11 and a second retaining ring 12, and the first retaining ring 11 and the second retaining ring 12 are located on different planes; the double-rib sealing gasket 20 has an outer rib 21 and an inner rib 22, and the inner rib 22 and the outer rib 21 have different heights; the first retaining ring 11 is adapted to the outer rib 21, and the second retaining ring 12 is adapted to the inner rib 22, so that when assembling the double-rib sealing gasket 20 and the junction box cover 10, the outer rib 21 is snapped into the first retaining ring 11, and the inner rib 22 is snapped into the second retaining ring 12.

[0036] It can be seen that the junction box mainly includes three parts: a junction box cover 10, a junction box base 30, and a double-rib sealing gasket 20. The double-rib sealing gasket 20 is used to seal the connection between the junction box cover 10 and the junction box base 30.

[0037] Among them, the junction box cover 10 has a first snap ring 11 and a second snap ring 12. A snap ring refers to a ring-shaped structure used for snap connection with other components. The double-ribbed gasket 20 has an outer rib 21 and an inner rib 22. As the name implies, the outer rib 21 is a structure located on the outer periphery of the double-ribbed gasket 20, and the inner rib 22 is a structure located on the inner periphery of the double-ribbed gasket 20. The first snap ring 11 is adapted to the outer rib 21, so that the outer rib 21 can be snapped into the first snap ring 11, realizing the snap connection between the first snap ring 11 of the junction box cover 10 and the outer periphery of the double-ribbed gasket 20, and realizing the first-stage sealing. The second snap ring 12 is adapted to the inner rib 22, so that the inner rib 22 can be snapped into the second snap ring 12, realizing the snap connection between the second snap ring 12 of the junction box cover 10 and the inner periphery of the double-ribbed gasket 20, and realizing the second-stage sealing. That is to say, when the junction box cover 10 and the double-ribbed gasket 20 are assembled, the outer rib 21 will be snapped into the first snap ring 11, and the inner rib 22 will be snapped into the second snap ring 12, realizing double sealing and improving the sealing effect.

[0038] Among them, the first snap ring 11 and the second snap ring 12 are located on different planes, that is, the plane where the first snap ring 11 is located and the plane where the second snap ring 12 is located are not at the same height. The inner rib 22 and the outer rib 21 have different heights, that is, the height of the inner rib 22 and the height of the outer rib 21 are different, and there is a height difference between the inner rib 22 and the inner rib 22. In this way, the snap connection position between the first snap ring 11 and the outer rib 21 and the snap connection position between the second snap ring 12 and the inner rib 22 are not on the same plane, so that seals with different heights can be formed, which can also be called a labyrinth sealing method, and the sealing effect is very good.

[0039] It can be seen that the junction box provided by the present invention can prevent dust from entering the inside of the junction box based on double sealing and the labyrinth sealing method, so that the junction box reaches the IP66 protection level.

[0040] In one embodiment, referring to Figure 1 , the junction box cover 10 has a first planar portion 13 and a second planar portion 14. The first planar portion 13 is a planar structure with a hollow middle. The second planar portion 14 is located in the hollow portion of the first planar portion 13. The outer edges of the second planar portion 14 are connected to the inner edges of the first planar portion 13 everywhere, and the second planar portion 14 protrudes towards the top of the junction box cover 10 relative to the first planar portion 13, where:

[0041] The first snap ring 11 is a circumferential flange located on the outer periphery of the first planar portion 13;

[0042] The second snap ring 12 is a step formed by the height difference between the second planar portion 14 and the first planar portion 13.

[0043] That is to say, the junction box cover 10 includes a first planar portion 13 and a second planar portion 14. The middle of the first planar portion 13 is hollow. The second planar portion 14 is located inside the first planar portion 13. The outer edges of the second planar portion 14 are connected to the inner edges of the first planar portion 13 everywhere, thereby realizing the connection between the first planar portion 13 and the second planar portion 14. The first snap ring 11 is a flange located on the outer periphery of the first planar portion 13. It can be seen that the first snap ring 11 is formed by the height difference between the first planar portion 13 and its outer flange. There is a height difference between the second planar portion 14 and the first planar portion 13, and the second snap ring 12 is a step formed by this height difference. It can be seen that the second snap ring 12 is formed by the height difference between the second planar portion 14 and the first planar portion 13.

[0044] It can be seen that both the first snap ring 11 and the second snap ring 12 are formed by height differences, making both the first snap ring 11 and the second snap ring 12 step-type snap rings. Compared with groove-type snap rings, the production of step-type snap rings is simpler.

[0045] In one embodiment, refer to Figure 1 The junction box cover 10 has a third planar portion 15. The second planar portion 14 is a planar structure with a hollow middle. The third planar portion 15 is located in the hollow part of the second planar portion 14. The outer edges of the third planar portion 15 are connected to the outer edges of the second planar portion 14 everywhere. The third planar portion 15 protrudes towards the top of the junction box cover 10 relative to the second planar portion 14 to increase the internal space of the junction box.

[0046] That is to say, the junction box cover 10 also has a third planar portion 15. The middle of the second planar portion 14 is hollow. The third planar portion 15 is located inside the second planar portion 14. The outer edges of the third planar portion 15 are connected to the inner edges of the second planar portion 14 everywhere, thereby realizing the connection between the third planar portion 15 and the second planar portion 14. Since there is a height difference between the third planar portion 15 and the second planar portion 14, the internal space of the junction box can be increased, providing more sufficient space for the wiring work of the junction box.

[0047] In one embodiment, refer to Figures 1 to 3, the height of the inner ring rib 22 is greater than the height of the outer ring rib 21. The height difference between the inner ring rib 22 and the outer ring rib 21 is the first height difference, and the height difference between the second plane portion 14 and the first plane portion 13 is the second height difference. The first height difference is greater than the second height difference, and the difference between the first height difference and the second height difference is a first preset value, so that when assembling the double-ribbed gasket 20 and the junction box cover 10, the compression amount of the double-ribbed gasket 20 is the first preset value.

[0048] It can be understood that the structure of the double-ribbed gasket 20 is: an inner ring rib 22 and an outer ring rib 21 are provided on a flat gasket with a hollow middle. The inner ring rib 22 is located at the inner peripheral edge of the flat gasket, and the outer ring rib 21 is located at the outer peripheral edge of the flat gasket. The height of the inner ring rib 22 is greater than the height of the outer ring rib 21, and the height difference between the inner ring rib 22 and the outer ring rib 21 is the first height difference. The height difference between the second plane portion 14 and the first plane portion 13 on the junction box cover 10 is the second height difference. The first height difference and the second height difference are not the same, but the first height difference is greater than the second height difference, and the difference between the first height difference and the second height difference is the first preset value.

[0049] For example, the first height difference is 3 mm, the second height difference is 2 mm, and the difference between the first height difference and the second height difference, that is, the first preset value, is 1 mm. When the double-ribbed gasket 20 and the junction box cover 10 are assembled, the height difference between the inner ring rib 22 and the outer ring rib 21 will be compressed by 1 mm, that is, the compression amount is 1 mm. This will make the inner ring rib 22 and the second snap ring 12 of the junction box cover 10 closely contact each other, achieving a perfect fit and eliminating the influence of the casting deformation of the junction box cover 10 on the sealing effect.

[0050] Wherein, the width of the inner ring rib 22 can be greater than the width of the outer ring rib 21. At this time, the height of the inner ring rib 22 is greater than the height of the outer ring rib 21, and the width of the inner ring rib 22 is greater than the width of the outer ring rib 21. It can be seen that the inner ring rib 22 can provide stronger sealing performance relative to the outer ring rib 21.

[0051] In one embodiment, referring to Figure 4 and Figure 5 , the junction box base 30 has a spigot ring 32, and the inner ring rib 22 is sleeved on the spigot ring 32 to realize the assembly of the double-ribbed gasket 20 and the junction box base 30.

[0052] That is to say, a rabbet ring 32 is provided on the junction box base 30. The so-called rabbet ring 32 refers to a ring of protrusions formed on the port plane 31 of the junction box base 30, and this ring of protrusions can be called a rabbet. Since the rabbet is in a ring shape, it can be more vividly called a rabbet ring 32. The inner ring rib 22 is sleeved on the rabbet ring 32. At this time, the flat gasket of the double-rib gasket 20 is in contact with the port plane 31 of the junction box base 30, realizing the assembly of the double-rib gasket 20 and the junction box base 30.

[0053] It can be seen that through the socket connection of the rabbet ring 32 and the inner ring rib 22, the assembly of the double-rib gasket 20 and the junction box base 30 is realized. It has both good sealing effect and the advantage of convenient assembly.

[0054] Furthermore, the size of the rabbet ring 32 is larger than the inner size of the inner ring rib 22, and the difference between the size of the rabbet ring 32 and the inner size of the inner ring rib 22 is a second preset value, so that the assembly of the double-rib gasket 20 and the junction box base 30 has an interference amount of the second preset value.

[0055] Among them, the size of the rabbet ring 32 is smaller than the inner size of the inner ring rib 22. Therefore, when the inner ring rib 22 is sleeved on the rabbet ring 32, the inner ring rib 22 will tightly hoop on the rabbet ring 32, further increasing the sealing effect. The difference between the size of the rabbet ring 32 and the inner size of the inner ring rib 22 is a second preset value, making the assembly of the double-rib gasket 20 and the junction box base 30 have an interference amount of the second preset value. The second preset value should not be too large or too small. While ensuring that the inner ring rib 22 will tightly hoop on the rabbet ring 32, it is also necessary to avoid excessive deformation of the double-rib gasket 20, so as to avoid the shortening of the service life caused by excessive deformation.

[0056] For example, the second preset value is set in the range of 1 mm to 2 mm.

[0057] In one embodiment, referring to Figures 1 to 5 , hole structures are provided on the junction box cover 10, the double-rib gasket 20, and the junction box base 30. The bolt 40 passes through the first hole structure 16 on the junction box cover 10, the second hole structure 23 on the double-rib gasket 20, and the third hole structure 33 on the junction box base 30 to realize the fixed connection of the junction box cover 10, the double-rib gasket 20, and the junction box base 30.

[0058] It is understandable that, in addition to assembling the double-ribbed gasket 20 and the junction box base 30 through the cooperation of the rabbet ring 32 and the inner ring rib 22, and assembling the double-ribbed gasket 20 and the junction box cover 10 through the cooperation of two snap rings and two rings of ribs, the junction box cover 10, the double-ribbed gasket 20 and the junction box base 30 are fixedly connected by means of the cooperation of bolts 40, hole structures and nuts, so as to increase the firmness and reliability of the assembly.

[0059] Specifically, hole structures are provided on the junction box cover 10, the double-ribbed gasket 20 and the junction box base 30. In this way, after the bolt 40 passes through the first hole structure 16 on the junction box cover 10, the second hole structure 23 on the double-ribbed gasket 20 and the third hole structure 33 on the junction box base 30, it is tightened with the nut, thereby realizing the fixed connection of the junction box cover 10, the double-ribbed gasket 20 and the junction box base 30.

[0060] Among them, the first hole structure 16 on the junction box cover 10 can be located on the first plane part 13 of the junction box cover 10, the second hole structure 23 on the double-ribbed gasket 20 can be located between the outer ring rib 21 and the inner ring rib 22, and the third hole structure 33 on the junction box base 30 can be located outside the rabbet ring 32.

[0061] That is to say, the first hole structure 16 on the junction box cover can be located between the two snap rings, the second hole structure 23 on the double-ribbed gasket 20 can be located between the two rings of ribs, and the third hole structure 33 on the junction box base 30 can be located on the port plane 31 of the junction box base 30 and outside the rabbet ring 32.

[0062] For example, the first hole structure 16 on the junction box is four holes located at the four corners, the second hole structure 23 on the double-ribbed gasket 20 is four holes located at the four corners of the flat gasket, and the third hole structure 33 on the junction box base 30 is four holes located at the four corners of the port plane 31 of the junction box base 30.

[0063] In one embodiment, referring to Figures 1 to 5 , the first snap ring 11 and the outer ring rib 21 can be quadrilateral, and the second snap ring 12 and the inner ring rib 22 can be octagonal. The reason why the second snap ring 12 and the inner ring rib 22 are octagonal is that four holes are provided at the four corners of the junction box cover 10 and four holes are provided at the four corners of the double-ribbed gasket 20. Due to the existence of the hole structures, the second snap ring 12 and the inner ring rib 22 adopt an octagonal shape.

[0064] In a second aspect, an embodiment of the present utility model provides a motor, which includes a junction box, and the junction box is the junction box provided in the first aspect. At this time, the junction box is applied to the motor, so it can also be called a motor junction box.

[0065] Each embodiment in this specification is described in a progressive manner. For the same or similar parts among the embodiments, reference can be made to each other. Each embodiment focuses on the differences from other embodiments. In particular, for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and for the relevant parts, reference can be made to the description of the method embodiment.

[0066] The specific implementation manners described above further elaborate on the purpose, technical solution, and beneficial effects of the present utility model. It should be understood that the above description is only the specific implementation manners of the present utility model and is not used to limit the protection scope of the present utility model. Any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solution of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A junction box, characterized in that: The invention comprises a junction box cover (10), a junction box base (30), and a double-ribbed sealing gasket (20) mounted between the junction box cover (10) and the junction box base (30), wherein: The junction box cover (10) comprises a first clamping ring (11) and a second clamping ring (12), wherein the first clamping ring (11) and the second clamping ring (12) are located on different planes; the double-rib sealing gasket (20) comprises an outer ring convex rib (21) and an inner ring convex rib (22), wherein the inner ring convex rib (22) and the outer ring convex rib (21) have different heights; the first clamping ring (11) is matched with the outer ring convex rib (21), and the second clamping ring (12) is matched with the inner ring convex rib (22), so that when the double-rib sealing gasket (20) and the junction box cover (10) are assembled, the outer ring convex rib (21) is inserted into the first clamping ring (11), and the inner ring convex rib (22) is inserted into the second clamping ring (12).

2. The junction box according to claim 1, characterized in that: The junction box cover (10) comprises a first plane portion (13) and a second plane portion (14), the first plane portion (13) being a plane structure with a hollow center, the second plane portion (14) being located in the hollow portion of the first plane portion (13), the outer edge of the second plane portion (14) being connected to the inner edge of the first plane portion (13), and the second plane portion (14) protruding toward the top of the junction box cover (10) relative to the first plane portion (13), wherein: The first clamping ring (11) is a flange located on the outer periphery of the first plane portion (13); The second clamping ring (12) is a circle of steps formed by the height difference between the second plane part (14) and the first plane part (13).

3. The junction box according to claim 2, characterized in that: The junction box cover (10) has a third plane portion (15); the second plane portion (14) is a plane structure with a hollow center; the third plane portion (15) is located in the hollow portion of the second plane portion (14); the outer edges of the third plane portion (15) are connected to the outer edges of the second plane portion (14); the third plane portion (15) protrudes toward the top of the junction box cover (10) relative to the second plane portion (14) to increase the internal space of the junction box.

4. The junction box according to claim 2, characterized in that: The height of the inner ring convex rib (22) is greater than the height of the outer ring convex rib (21); the height difference between the inner ring convex rib (22) and the outer ring convex rib (21) is a first height difference; the height difference between the second plane portion (14) and the first plane portion (13) is a second height difference; the first height difference is greater than the second height difference, and the difference between the first height difference and the second height difference is a first preset value, so that when the double-rib sealing gasket (20) and the junction box cover (10) are assembled, the compression amount of the double-rib sealing gasket (20) is the first preset value.

5. The junction box according to claim 2, characterized in that: The junction box base (30) is provided with a stop ring (32), and the inner ring convex rib (22) is sleeved on the stop ring (32) to achieve assembly of the double-rib sealing gasket (20) and the junction box base (30).

6. The junction box according to claim 5, characterized in that: The size of the stop ring (32) is larger than the inner ring size of the inner ring convex rib (22), and the difference between the size of the stop ring (32) and the inner ring size of the inner ring convex rib (22) is a second preset value, so that the assembly of the double-rib sealing gasket (20) and the junction box base (30) has an interference fit of the second preset value.

7. The junction box according to claim 5, characterized in that: The junction box cover (10), the double-ribbed sealing gasket (20) and the junction box base (30) are all provided with hole structures, and bolts (40) are passed through the first hole structure (16) on the junction box cover (10), the second hole structure (23) on the double-ribbed sealing gasket (20) and the third hole structure (33) on the junction box base (30) to achieve fixed connection between the junction box cover (10), the double-ribbed sealing gasket (20) and the junction box base (30).

8. The junction box according to claim 7, characterized in that: The first hole structure (16) on the junction box cover (10) is located on the first plane portion (13) of the junction box cover (10), the second hole structure (23) on the double-rib sealing gasket (20) is located between the outer ring rib (21) and the inner ring rib (22), and the third hole structure (33) on the junction box base (30) is located on the outer side of the stop ring (32).

9. The junction box according to claim 1, characterized in that: The width of the inner ring convex rib (22) is greater than the width of the outer ring convex rib (21); and / or the first clamping ring (11) and the outer ring convex rib (21) are quadrilaterals, and the second clamping ring (12) and the inner ring convex rib (22) are octagonal.

10. A motor, characterized in that: The invention comprises the junction box as claimed in any one of claims 1 to 9.

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