Connector and power conversion device

Abstract

The utility model relates to a connector and a power conversion device. The connector includes: a connection body; the first limiting part is arranged on the connecting main body in a protruding mode in the direction perpendicular to the first direction, a limiting groove is formed in the first limiting part in a sunken mode, and the first direction is the axial direction of the connecting main body. According to the connector, the limiting groove is formed in the first limiting part in a sunken mode, the limiting groove can play a good limiting effect on flowing of the glue, it is ensured that the first sealing piece is located at the designated needed position after the glue is cured and formed, therefore, the position precision of the first sealing piece is improved, and finally the sealing performance of the connector is improved.

Description

Technical Field

[0001] This application relates to the field of new energy technology, and in particular to a connector and a power conversion device. Background Technology

[0002] With the rapid development of new energy technologies, solar energy is widely used in daily production and life due to its advantages such as being pollution-free and sustainable. Generally, solar energy can be converted into electrical energy through photovoltaic power generation technology. The direct current (DC) generated by photovoltaic power generation is then converted into alternating current (AC) through a power conversion device. This AC power can then be used as electrical energy and fed into the power grid. The power conversion device includes connectors used to transmit AC or DC power; however, traditional connectors often suffer from poor sealing. Utility Model Content

[0003] One technical problem addressed by this application is how to improve the sealing performance of connectors.

[0004] A connector, comprising:

[0005] Connecting main body; and

[0006] A first limiting part is provided on the connecting body, protruding along a first direction perpendicular to the first direction. A limiting groove is formed in the first limiting part, and the first direction is the axial direction of the connecting body.

[0007] In one embodiment, the first limiting portion includes a first limiting protrusion and a second limiting protrusion, the first limiting protrusion and the second limiting protrusion are spaced apart by a predetermined distance along the first direction, and the gap between the first limiting protrusion and the second limiting protrusion forms the limiting groove.

[0008] In one embodiment, the cross-section of the limiting groove perpendicular to the first direction is a polygon, and the polygon includes at least a first side, a second side, a third side, and a fourth side; the second side and the third side are respectively connected to the opposite ends of the first side, and the first side and the fourth side are arranged opposite to each other;

[0009] The length of the fourth side is greater than the length of the first side, and the projection of the first side onto the fourth side falls within the fourth side.

[0010] In one embodiment, the angle between the first side and the second side is a first angle, the angle between the second side and the fourth side is a second angle, the angle between the third side and the first side is a third angle, and the angle between the fourth side and the third side is a fourth angle, wherein the angle is formed by the side or the extension of the side.

[0011] The first angle and the third angle are greater than 90 degrees.

[0012] In one embodiment, the polygon further includes a fifth side and a sixth side, the fifth side connecting between the second side and the fourth side, and the sixth side connecting between the third side and the fourth side; the fifth side is not collinear with the second side, and the sixth side is not collinear with the third side;

[0013] The angle between the fifth side and the fourth side is the fifth angle, and the angle between the sixth side and the fourth side is the sixth angle;

[0014] In one embodiment, the fifth angle and the sixth angle are less than or equal to 90 degrees; or, the fifth angle and the sixth angle are greater than 90 degrees.

[0015] In one embodiment, the connector further includes a second limiting portion; the second limiting portion protrudes from the connecting body and is spaced apart from the first limiting portion.

[0016] In one embodiment, the connector further includes a third limiting portion, the second limiting portion protruding from the connecting body, and the second limiting portion being spaced between the first limiting portion and the third limiting portion.

[0017] A power conversion device includes a housing, a first seal, and a connector as described above, wherein the first seal is received in the limiting groove.

[0018] In one embodiment, the power conversion device further includes a circuit board, the housing includes a first housing and a second housing, the circuit board is disposed in the second housing; the connecting body is used to connect to the circuit board, the first limiting portion has a first edge and two second edges, the first edge is disposed close to the first housing, and the two second edges are respectively disposed at opposite ends of the first edge and are disposed at an obtuse angle to the first edge.

[0019] In one embodiment, the housing is inserted into the limiting groove.

[0020] In one embodiment, a second seal is also included, the housing forming a receiving cavity, the second seal being disposed around the receiving cavity to seal the receiving cavity.

[0021] In one embodiment, the second seal is integrally formed with the first seal.

[0022] In one embodiment, the housing also includes a circuit board, and the housing comprises a first housing and a second housing;

[0023] The first shell includes a top plate and a first outer ring and a first inner ring protruding from the top plate, the first outer ring surrounding the first inner ring; the second shell includes a bottom plate and a second outer ring and a second inner ring protruding from the bottom plate, the second outer ring surrounding the second inner ring.

[0024] The first outer ring abuts against the second outer ring, and an annular groove is formed between the second outer ring and the second inner ring to surround the accommodating cavity and to accommodate the second seal. The first inner ring is inserted into both the annular groove and the limiting groove. The circuit board is disposed on the base plate and connected to the connecting body.

[0025] In one embodiment, both the first inner ring and the second inner ring have recesses, the shape of which is adapted to the outer contour of the limiting groove.

[0026] In one embodiment, the connector further includes a second limiting portion and a third limiting portion protruding from the connecting body, the first limiting portion being spaced between the second limiting portion and the third limiting portion, both the first outer ring and the second outer ring abutting between the first limiting portion and the second limiting portion, and the second inner ring abutting between the first limiting portion and the third limiting portion.

[0027] In one embodiment, the first limiting portion includes a first limiting protrusion and a second limiting protrusion spaced apart, the gap between the first limiting protrusion and the second limiting protrusion forms the limiting groove, the second limiting protrusion is closer to the receiving cavity than the first limiting protrusion, a recessed clearance space is formed on the second limiting protrusion, the second inner ring cooperates with the clearance space, and the second limiting protrusion can abut against the second inner ring in a direction perpendicular to the first direction.

[0028] One technical effect of one embodiment of this application is that, given that a limiting groove is formed in the recess on the first limiting portion, the limiting groove can effectively limit the flow of the adhesive, ensuring that the first sealing element after the adhesive has cured and formed is located in the specified required position, thereby improving the positional accuracy of the first sealing element and ultimately improving the sealing performance of the connector. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural schematic diagram of a power conversion device provided in one embodiment.

[0030] Figure 2 for Figure 1 A partial three-dimensional structural schematic diagram of the power conversion device shown.

[0031] Figure 3 for Figure 1A three-dimensional cross-sectional view of the power conversion device shown.

[0032] Figure 4 for Figure 3 Enlarged structural diagram at point B.

[0033] Figure 5 for Figure 1 A schematic diagram of the first example cross-section of the limiting groove in the power conversion device shown.

[0034] Figure 6 for Figure 1 A schematic diagram of a second example cross-section of the limiting groove in the power conversion device shown.

[0035] Figure 7 for Figure 1 The diagram shows the exploded structure of the power conversion device after removing a portion of its structure.

[0036] Figure 8 for Figure 7 A schematic diagram of a local structure.

[0037] Figure 9 for Figure 1 The diagram shows the exploded structure of the power conversion device.

[0038] Figure 10 for Figure 1 A partial planar cross-sectional view of the power conversion device shown.

[0039] Reference numerals: Power conversion device 10, connector 20, circuit board 30, housing 40, first housing 410, top plate 411, first outer ring 412, first inner ring 413, recess 4131, second housing 420, bottom plate 421, second outer ring 422, second inner ring 423, annular groove 424, accommodating cavity 430, first seal 51, second seal 52, connecting body 100, first limiting part 200, limiting groove 230, first side 231, second side 232, third side 233, fourth side 234, fifth side 235, sixth side 236, first limiting protrusion 210, second limiting protrusion 220, clearance space 221, first edge 201, second edge 202, second limiting part 310, third limiting part 320. Detailed Implementation

[0040] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0041] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0042] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0043] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0044] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0045] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0046] See Figure 1 A connector 20 provided in one embodiment of this application can be applied to a power conversion device 10.

[0047] Connector 20 can be a DC terminal or an AC terminal. This application... Figure 1 Only DC terminals are shown. In other embodiments, connector 20 may integrate both AC and DC terminals (e.g., ...). Figure 10 This allows the AC and DC terminals to be integrated into one unit.

[0048] The power converter 10 involved in this application is a power conversion device used to convert electrical energy from one form to another to achieve energy transmission and control under different power requirements. Common examples include photovoltaic inverters, energy storage converters, optimizers, microinverters, and uninterruptible power supplies (UPS). For example, the power converter 10 can convert DC direct current to AC alternating current. The DC input terminal of the power converter 10 is connected to a DC source (photovoltaic module), and the AC output terminal can be connected to an AC power grid and AC equipment.

[0049] The power conversion device 10 may also include a housing 40, a circuit board 30, and a first seal 51 (e.g., Figure 7 and Figure 8 The shell 40 forms a receiving cavity 430 (e.g.) Figure 4The circuit board 30 is disposed inside the housing 40, and the first sealing member 51 abuts between the connector 20 and the housing 40. The housing 40 may be generally cuboid in shape and includes a first shell 410 and a second shell 420. The first shell 410 includes a top plate 411, a first outer ring 412 and a first inner ring 413. Both the first outer ring 412 and the first inner ring 413 protrude from the same surface in the thickness direction of the top plate 411, such that both the first outer ring 412 and the first inner ring 413 are located on the same side in the thickness direction of the top plate 411. The first outer ring 412 surrounds the first inner ring 413. The second housing 420 includes a base plate 421, a second outer ring 422, and a second inner ring 423. Both the second outer ring 422 and the second inner ring 423 protrude from the same surface in the thickness direction of the base plate 421, such that both are located on the same side in the thickness direction of the base plate 421. The second outer ring 422 surrounds the second inner ring 423. The circuit board 30 is disposed on the base plate 421 and housed in the receiving cavity 430 (e.g., ...). Figure 3 and 4 ).

[0050] See Figure 2 In some embodiments, the connector 20 includes a connecting body 100 and a first limiting portion 200 (e.g., ...). Figure 2 For ease of description, the axial direction of the connecting body 100 is denoted as the first direction, which is... Figure 2 The direction indicated by the double arrows in the dashed line indicates that the connecting body 100 passes through the housing 40. For example, the connecting body 100 can simultaneously pass through the first outer ring 412, the first inner ring 413, the second outer ring 422, and the second inner ring 423, so that the connecting body 100 extends into the receiving cavity 430 and is electrically connected to the circuit board 30 (e.g., Figure 5 It can be understood that the connecting body 10 is the connector 20 excluding the first limiting part 200.

[0051] See Figure 2 The first limiting part 200 protrudes along a direction perpendicular to the first direction and is provided on the connecting body 100. A limiting groove 230 is formed in the first limiting part 200. The limiting groove 230 is used to accommodate the first sealing member 51 of the power conversion device 10. The first sealing member 51 is formed by curing with glue. The first sealing member 51 after curing has a certain degree of flexibility. When the first sealing member 51 is accommodated in the limiting groove 230, the shape of the first sealing member 51 is adapted to the shape of the limiting groove 230.

[0052] See Figure 2This causes the first seal 51 to abut between the first limiting part 200 and the housing 40, thereby sealing the gap between the connector 20 and the housing 40 and preventing external droplets or dust from entering the receiving cavity 430 through the gap to cause corrosion.

[0053] If a locating groove is not provided on the connector, a seal cannot be installed between the connector and the housing, thus compromising the connector's sealing performance. Even if a seal is installed between the connector and the housing, the lack of a locating groove during the adhesive curing process allows for some degree of uncontrolled adhesive flow. Consequently, the cured seal may not be properly positioned, affecting its assembly accuracy and ultimately the connector's sealing performance.

[0054] See Figure 2 As for the connector 20 in the above embodiment, since a limiting groove 230 is formed in the recess on the first limiting part 200, the limiting groove 230 can play a good limiting effect on the flow of adhesive, ensuring that the first sealing member 51 after the adhesive is cured and molded is located in the specified required position, thereby improving the positional accuracy of the first sealing member 51 and ultimately improving the sealing performance of the connector 20.

[0055] See Figure 2 In some embodiments, the first limiting portion 200 includes a first limiting protrusion 210 and a second limiting protrusion 220, which are spaced apart by a predetermined distance along a first direction. The gap between the first limiting protrusion 210 and the second limiting protrusion 220 forms a limiting groove 230. For example, the limiting groove 230 can be annular, allowing it to surround the connecting body 100. This simplifies the structure of the limiting groove 230, reduces its processing difficulty, and ultimately lowers the manufacturing cost of the connector 20.

[0056] See Figure 5 In some embodiments, the cross-section of the limiting groove 230 perpendicular to the first direction is a polygon, which includes at least a first side 231, a second side 232, a third side 233, and a fourth side 234. The second side 232 and the third side 233 are respectively connected to the opposite ends of the first side 231. The first side 231 and the fourth side 234 are arranged opposite each other, and the first side 231 and the fourth side 234 can be arranged parallel to each other. The second side 232 is located between the first side 231 and the fourth side 234. The second side 232 and the fourth side 234 can be directly connected, or the second side 232 can also be indirectly connected to the fourth side 234 through other intermediate connecting edges (e.g., ...). Figure 7The third side 233 is located between the first side 231 and the fourth side 234. The third side 233 and the fourth side 234 can be directly connected, or the third side 233 can also be indirectly connected to the fourth side 234 through other intermediate connecting edges (such as...). Figure 7 ).

[0057] The length of the fourth side 234 is greater than the length of the first side 231, and the projection of the first side 231 onto the fourth side falls within the fourth side 234. This ensures that the limiting groove 230 can accommodate a sufficient amount of adhesive, effectively filling the limiting groove 230 and improving the molding effect of the first seal 51 and the sealing performance of the connector 20. Furthermore, it ensures that the first seal 51 has sufficient length and coverage area, which also improves the sealing performance of the connector 20.

[0058] During the molding process of the first seal 51, adhesive can be injected into the limiting groove 230 by dispensing or injection. After the adhesive cures in the limiting groove 230, the cured adhesive will form the first seal 51. By setting the cross-section of the limiting groove 230 to a polygon as described above, more adhesive can be retained, allowing the adhesive to effectively fill the limiting groove 230, thereby improving the molding effect of the first seal 51 and thus improving the sealing performance of the connector 20.

[0059] See Figure 5 In some embodiments, the angle between the first side 231 and the second side 232 is a first angle A1, the angle between the second side 232 and the fourth side 234 is a second angle A2, the angle between the third side 233 and the first side 231 is a third angle A3, and the angle between the fourth side 234 and the third side 233 is a fourth angle A4. These angles are formed by the sides or their extensions. The first angle A1 and the third angle A3 are greater than 90 degrees, which further enhances the adhesion and containment of the adhesive by the second side 232 and the third side 233, ensuring that the adhesive effectively fills the limiting groove 230, thereby improving the molding effect of the first seal 51 and enhancing the sealing performance of the connector 20.

[0060] See Figure 6In some embodiments, the polygon may further include a fifth side 235 and a sixth side 236. The fifth side 235 can be directly connected between the second side 232 and the fourth side 234, and the sixth side 236 can be directly connected between the third side 233 and the fourth side 234. In this case, the polygon is hexagonal. The fifth side 235 is not collinear with the second side 232, and the sixth side 236 is not collinear with the third side 233. The fifth angle A5 and the sixth angle A6 are less than or equal to 90 degrees. For example, the fifth angle A5 and the sixth angle A6 can be right angles of 90 degrees, or they can be acute angles less than 90 degrees. By setting the fifth side 235 and the sixth side 236, and making the fifth angle A5 and the sixth angle A6 less than or equal to 90 degrees, the adhesive can cover the entire limiting groove 230 without forming gaps at the outer corners of the fifth angle A5 and the sixth angle A6, thereby improving the molding effect of the first sealing element 51 and improving the sealing performance of the connector 20.

[0061] When the fifth angle A5 and the sixth angle A6 are 90 degrees, during the downward pressing of the first shell 410, the adhesive can flow upward along the fifth side 235 and the sixth side 236, ensuring no gap between the fifth side 235 and the sixth side 236 and the first inner ring 413 of the first shell 410, thus guaranteeing a sealing effect. In other embodiments, the fifth angle A5 and the sixth angle A6 can also be greater than 90 degrees (e.g., Figure 10 This saves material on connector 20, thereby reducing the manufacturing cost of connector 20.

[0062] Referring to 4, in some embodiments, the connector 20 further includes a second limiting portion 310; the second limiting portion 310 protrudes from the connecting body 100 and is spaced apart from the first limiting portion 200 along a first direction. The second limiting portion 310 is located outside the housing 40, that is, outside the receiving cavity 430. The first limiting protrusion 210 may be spaced apart between the second limiting portion 310 and the second limiting protrusion 220, the first outer ring 412 may abut against the first limiting protrusion 210 and the second limiting portion 310 along the first direction, and the second outer ring 422 may also abut against the first limiting protrusion 210 and the second limiting portion 310 along the first direction, thus effectively limiting the first outer ring 412 and the second outer ring 422, thereby improving the assembly accuracy and assembly efficiency of the housing 40. Based on the improved assembly accuracy of the housing 40, the assembly accuracy of the first sealing member 51 can be improved, thereby improving the sealing performance of the connector 20.

[0063] See Figure 4In some embodiments, the connector 20 further includes a third limiting portion 320, and a second limiting portion 310 protruding from the connecting body 100. The second limiting portion 310 is spaced apart between the first limiting portion 200 and the third limiting portion 320 along a first direction. The second inner ring 423 can abut against the first limiting portion 200 and the third limiting portion 320 along the first direction, thereby improving the assembly accuracy and efficiency of the second inner ring 423 and the entire housing 40, and consequently improving the assembly accuracy of the first sealing member 51 to enhance the sealing performance of the connector 20.

[0064] See Figure 1 This application also provides a power conversion device 10, which includes a housing 40, a first seal 51, and the aforementioned connector 20 (e.g., Figure 4 and Figure 5 The first sealing element 51 is housed in the limiting groove 230, and the housing 40 and the first limiting part 200 are bonded together by the first sealing element 51. Therefore, through the action of the limiting groove 230 and the first sealing element 51, the assembly accuracy of the first sealing element 51 can be improved, thereby improving the sealing effect of the first sealing element 51 on the housing 40, and thus improving the sealing performance of the entire power conversion device 10.

[0065] See Figure 2 In some embodiments, the first limiting portion 200 has a first edge 201 and two second edges 202. The first edge 201 is disposed close to the first housing 410 relative to the two second edges 202, such that the two second edges 202 are located on the same side of the first edge 201. The two second edges 202 are respectively disposed at opposite ends of the first edge 201 and are set at obtuse angles to the first edge 201. Given that the first angle A1 and the third angle A3 are greater than 90 degrees, the obtuse angles of the first edge 201 and the second edge 202 can be well adapted to the shape of the limiting groove 230, making the overall shape of the connector 20 more streamlined and easier to assemble.

[0066] See Figure 4 In some embodiments, the housing 40 is inserted into the limiting groove 230, so that the first inner ring 413 of the first housing 410 can be inserted into the limiting groove 230. By inserting the first inner ring 413 into the limiting groove 230 and forming a mating relationship with it, the assembly accuracy of the housing 40 and the first seal 51 is improved, thereby improving the sealing performance of the connector 20 and the entire power conversion device 10. For example, a recess 4131 penetrating the first inner ring 413 is provided (e.g., ...). Figure 9The recess 4131 extends through the first inner ring 413 along its thickness direction. A portion of the first limiting part 200 with a limiting groove 230 passes through the recess 4131, allowing the first inner ring 413 to be inserted into the limiting groove 230. It is understood that during the assembly of the power conversion device 10, the connector 20 is first placed on the second housing 420, and glue is injected into the limiting groove 230. Then, the first housing 410 is installed in the second housing 420. Obviously, since the first inner ring 413 is inserted into the limiting groove 230, the first sealing element 51 formed by the cured glue will be fixedly connected to the first inner ring 413, thereby improving the sealing effect of the first sealing element 51 on the connector 20 and the power conversion device 10, and also improving the connection strength between the first housing 410 and the second housing 420. Simultaneously, under the driving action of the first inner ring 413, the adhesive can fill the entire limiting groove 230, thereby improving the molding effect of the first seal 51 and ultimately improving the sealing performance of the connector 20 and the entire power conversion device 10. The second seal 52 is arranged around the receiving cavity 430 to seal the receiving cavity 430.

[0067] See Figure 4 In some embodiments, the power conversion device 10 further includes a second seal 52, which surrounds the receiving cavity 430 to seal the receiving cavity 430. The second seal 52 is integrally formed with the first seal 51, thereby improving the forming efficiency of the second seal 52 and the first seal 51 and reducing the manufacturing cost of the power conversion device 10.

[0068] See Figure 4 In some embodiments, the first outer ring 412 and the second outer ring 422 abut against each other, and an annular groove 424 is formed between the second outer ring 422 and the second inner ring 423. The annular groove 424 surrounds the receiving cavity 430. The second seal is received in the annular groove 424. By setting the annular groove 424, the glue of the unformed second seal 52 can be well limited, thereby improving the positional accuracy of the formed second seal 52, and thus improving the sealing effect on the receiving cavity 430 to improve the sealing performance of the power conversion device 10. During the assembly process of the power conversion device 10, after the connector 20 is placed on the second shell 420, glue can be injected into the limiting groove 230 and the annular groove 424 at the same time, and then the first shell 410 is placed on the second shell 420. After the glue cures, the glue in the limiting groove 230 cures to form the first seal 51, and the glue in the annular groove 424 cures to form the second seal 52. A portion of the first limiting part 200 can extend into the annular groove 424, so that a portion of the limiting groove 230 is located within the annular groove 424. Therefore, the adhesive can communicate between the annular groove 424 and the limiting groove 230, thereby realizing the integral molding of the first sealing member 51 and the second sealing member 52.

[0069] See Figure 4 In some embodiments, given that the first inner ring 413 and the second inner ring 423 are provided with recesses 4131, the shape of the recesses 4131 is adapted to the outer contour of the limiting groove 230 (e.g., Figure 10 In simple terms, the outline of the recess 413 is roughly parallel to the outline of the limiting groove 230. There can be a gap of 0.1mm to 0.9mm between the outer contours of the recess 4131 and the limiting groove 230, allowing adhesive to flow in and fill this gap, thus enabling the first sealing element 51 to simultaneously perform both sealing and connecting functions. When the first inner ring 413 is inserted into the limiting groove 230, it can also be simultaneously inserted into the annular groove 424, meaning the first inner ring 413 is inserted into both the limiting groove 230 and the annular groove 424. After the second sealing element 52 is formed, it serves to seal the accommodating cavity 430 and connect the first inner ring 413 and the second shell 420, thereby increasing the connection strength between the first shell 410 and the second shell 420.

[0070] See Figure 4 Given that both the first outer ring 412 and the second outer ring 422 abut between the first limiting part 200 and the second limiting part 310, and the second inner ring 423 abuts between the first limiting part 200 and the third limiting part 320, the connector 20 plays a limiting role in the installation of the housing 40, thereby improving the assembly accuracy and efficiency of the housing 40.

[0071] See Figure 4 In some embodiments, the second limiting protrusion 220 is closer to the receiving cavity 430 than the first limiting protrusion 210. A clearance space 221 is formed on the second limiting protrusion 220 with a recess perpendicular to the first direction, and the second inner ring 423 cooperates with the clearance space 221. By providing the clearance space 221, the second limiting protrusion 220 can abut against the second inner ring 423 perpendicular to the first direction, thereby further improving the assembly accuracy and efficiency of the housing 40, and thus improving the sealing performance of the connector 20 and the entire power conversion device 10.

[0072] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0073] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A connector characterized by comprising: include: Connecting main body; and A first limiting part is provided on the connecting body, protruding along a first direction perpendicular to the first direction. A limiting groove is formed in the first limiting part, and the first direction is the axial direction of the connecting body.

2. The connector of claim 1, wherein The first limiting portion includes a first limiting protrusion and a second limiting protrusion. The first limiting protrusion and the second limiting protrusion are spaced apart by a predetermined distance along the first direction, and the gap between the first limiting protrusion and the second limiting protrusion forms the limiting groove.

3. The connector of claim 1, wherein The cross-section of the limiting groove perpendicular to the first direction is a polygon, and the polygon includes at least a first side, a second side, a third side, and a fourth side; the second side and the third side are respectively connected to the opposite ends of the first side, and the first side and the fourth side are arranged opposite to each other; The length of the fourth side is greater than the length of the first side, and the projection of the first side onto the fourth side falls within the fourth side.

4. The connector of claim 3, wherein The angle between the first side and the second side is the first angle, the angle between the second side and the fourth side is the second angle, the angle between the third side and the first side is the third angle, and the angle between the fourth side and the third side is the fourth angle. The angle is formed by the side or the extension of the side. The first angle and the third angle are greater than 90 degrees.

5. The connector of claim 3, wherein The polygon also includes a fifth side and a sixth side, the fifth side connecting between the second side and the fourth side, and the sixth side connecting between the third side and the fourth side; the fifth side is not collinear with the second side, and the sixth side is not collinear with the third side; The angle between the fifth side and the fourth side is the fifth angle, and the angle between the sixth side and the fourth side is the sixth angle.

6. The connector according to claim 5, characterized in that, The fifth angle and the sixth angle are less than or equal to 90 degrees; or, the fifth angle and the sixth angle are greater than 90 degrees.

7. The connector of claim 1, wherein The connector further includes a second limiting part; the second limiting part protrudes from the connecting body and is spaced apart from the first limiting part.

8. The connector of claim 7, wherein, The connector further includes a third limiting part, and the second limiting part protrudes from the connecting body and is spaced between the first limiting part and the third limiting part.

9. A power conversion device, characterized by, It includes a housing, a first seal, and a connector according to any one of claims 1 to 8, wherein the first seal is received in the limiting groove.

10. The power conversion device of claim 9, wherein, The power conversion device further includes a circuit board, and the housing includes a first housing and a second housing, with the circuit board disposed in the second housing; the connecting body is used to connect with the circuit board, and the first limiting part has a first edge and two second edges, the first edge being disposed close to the first housing, and the two second edges being disposed at opposite ends of the first edge and at an obtuse angle to the first edge.

11. The power conversion device of claim 9, wherein, The housing is inserted into the limiting groove.

12. The power conversion device of claim 9, wherein, It also includes a second seal, the housing forming a receiving cavity, the second seal being disposed around the receiving cavity to seal the receiving cavity.

13. The power conversion device of claim 12, wherein, The second seal is connected to the first seal by means of integral molding.

14. The power conversion device of claim 12, wherein, The casing also includes a circuit board, and the housing comprises a first casing and a second casing; The first shell includes a top plate and a first outer ring and a first inner ring protruding from the top plate, the first outer ring surrounding the first inner ring; the second shell includes a bottom plate and a second outer ring and a second inner ring protruding from the bottom plate, the second outer ring surrounding the second inner ring. The first outer ring abuts against the second outer ring, and an annular groove is formed between the second outer ring and the second inner ring to surround the accommodating cavity and to accommodate the second seal. The first inner ring is inserted into both the annular groove and the limiting groove. The circuit board is disposed on the base plate and connected to the connecting body.

15. The power conversion device of claim 14, wherein, Both the first inner ring and the second inner ring have recesses, the shape of which is adapted to the outer contour of the limiting groove.

16. The power conversion device of claim 14, wherein, The connector further includes a second limiting portion and a third limiting portion protruding from the connecting body. The first limiting portion is spaced between the second limiting portion and the third limiting portion. Both the first outer ring and the second outer ring abut against the first limiting portion and the second limiting portion. The second inner ring abuts against the first limiting portion and the third limiting portion.

17. The power conversion device of claim 14, wherein, The first limiting portion includes a first limiting protrusion and a second limiting protrusion spaced apart. The gap between the first limiting protrusion and the second limiting protrusion forms the limiting groove. The second limiting protrusion is closer to the receiving cavity than the first limiting protrusion. A clearance space is formed by a recess on the second limiting protrusion. The second inner ring cooperates with the clearance space, and the second limiting protrusion can abut against the second inner ring in a direction perpendicular to the first direction.

Images