Connecting structure of frame piece and ceramic cover, relay

Abstract

The application relates to a connecting structure of a frame sheet and a ceramic cover, and a relay, wherein the connecting structure of the frame sheet and the ceramic cover comprises a ceramic cover; and a frame sheet, which comprises a first annular sheet and a second annular sheet, the second annular sheet is connected to the first annular sheet, an upper edge of the second annular sheet is provided with a bent part, the bent part is outwardly bent in a manner that the opening of the second annular sheet is enlarged, and the bent part is welded to a lower end surface of the ceramic cover; and solder can be adsorbed at an included angle between the bent part and the lower end surface of the ceramic cover. The application can reduce the solder climbing along the frame sheet and improve the welding strength between the frame sheet and the ceramic cover.

Description

Technical Field

[0001] This application relates to the field of electronic control device technology, and in particular to a connection structure between a frame and a ceramic cover, and a relay. Background Technology

[0002] A relay is an electronic control device with a control system (also known as an input circuit) and a controlled system (also known as an output circuit). It is commonly used in automatic control circuits. Its principle is essentially to use a smaller current to control a larger current, acting as an "automatic switch." Therefore, it plays a role in automatic adjustment, safety protection, and circuit switching, and is widely used in fields such as new energy vehicles. High-voltage DC relays are a type of relay. Most existing high-voltage DC relays adopt a direct-acting structure with a moving spring, utilizing two stationary contacts and one moving spring. Depending on the actual application in vehicles, the contacts need to connect, disconnect, and switch under load to achieve the "switching" function.

[0003] In related technologies, the insulating cover and yoke plate of a high-voltage DC relay are connected by welding a frame plate. The top surface of the frame plate is attached to the lower end surface of the insulating cover, forming a flat welded bonding surface between them.

[0004] During the implementation of the relevant technology, the applicant discovered that the welded structure between the insulating cover and the frame in the above-mentioned high-voltage DC relay is not strong and is prone to cracking during use. Utility Model Content

[0005] Therefore, it is necessary to address the problem of poor welding between the top surface of the frame and the lower end surface of the insulating cover in existing relays, and to provide a connection structure between the frame and the ceramic cover. A relay is also proposed.

[0006] According to one aspect of this application, a connection structure between a frame and a ceramic cover is provided, comprising: a ceramic cover; and a frame, the frame including a first annular piece and a second annular piece, the second annular piece being connected to the first annular piece, the upper edge of the second annular piece being provided with a bend, and the bend being bent outward in a manner that enlarges the opening of the second annular piece, the bend being welded to the lower end face of the ceramic cover; solder is adsorbed at the angle between the bend and the lower end face of the ceramic cover.

[0007] In some embodiments, the second annular piece includes an annular body, the first annular piece is connected to the lower end of the annular body, the bent portion is connected to the upper end of the annular body, the bent portion includes an inner side surface, an outer side surface and a top surface connecting the inner side surface and the outer side surface, and an angle is formed between the inner side surface and the end surface for adsorbing solder.

[0008] In some embodiments, the inner surface is a curved surface, a wavy surface, or an inclined surface that is tilted relative to the lower end surface of the ceramic cover.

[0009] In some embodiments, the connection between the inner side surface and the ring body is provided with a groove or a protrusion.

[0010] In some embodiments, the inner surface has a flat area, and the end face of the ceramic cover rests against the flat area.

[0011] In some embodiments, the flat area is located at the free end of the inner side surface, and the area of ​​the inner side surface outside the flat area has a curved or wavy surface structure.

[0012] In some embodiments, the flat area is a ring-shaped surface with a planar arrangement on the inner side.

[0013] In some embodiments, a reinforcing rib is provided on the outer side, the reinforcing rib being connected to the ring body, and the reinforcing rib being used to enhance the pressure-bearing capacity of the bent portion from the ceramic cover.

[0014] In some embodiments, the bent portion is a ring-shaped part with a cross-section that is arc-shaped, a single-peak curve, or an oblique line.

[0015] In some embodiments, the first annular sheet and the second annular sheet are integrally formed or welded together.

[0016] According to another aspect of this application, a relay includes the connection structure between the frame and the ceramic cover.

[0017] The connection structure between the frame and the ceramic cover in this application features a bending portion that bends outward to enlarge the opening of the second annular piece. When the bending portion is welded to the lower end face of the ceramic cover, the solder adheres more to the angle between the bending portion and the lower end face of the ceramic cover. Furthermore, the bending portion is a slope relative to the lower end face of the ceramic cover, which reduces the solder climbing along the frame and allows the solder to adhere better at the angle between the bending portion and the lower end face of the ceramic cover. This increases the welding area between the frame and the ceramic cover, thereby improving the welding strength between the frame and the insulating cover. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the connection structure between the frame and the ceramic cover provided in one embodiment of this application.

[0019] Figure 2 for Figure 1 An exploded view of the connection structure between the frame and the ceramic cover provided in the embodiment.

[0020] Figure 3 for Figure 1A cross-sectional view of the connection structure between the frame and the ceramic cover in an embodiment.

[0021] Figure 4 for Figure 3 An enlarged schematic diagram of region A in the middle.

[0022] Figure 5 This is a cross-sectional view of the connection structure between the frame and the ceramic cover according to another embodiment.

[0023] Figure 6 for Figure 5 A magnified view of region B in the middle.

[0024] Figure 7 for Figure 5 An exploded view of the frame in the connection structure between the frame and the ceramic cover in the embodiment.

[0025] Figure 8 This is an enlarged schematic diagram of region A of the connection structure between the frame and the ceramic cover in another embodiment.

[0026] Figure 9 This is an enlarged schematic diagram of region A of the connection structure between the frame and the ceramic cover in another embodiment.

[0027] Figure 10 This is an enlarged schematic diagram of region A of the connection structure between the frame and the ceramic cover in another embodiment.

[0028] Figure 11 This is an enlarged schematic diagram of region A of the connection structure between the frame and the ceramic cover in another embodiment.

[0029] Explanation of reference numerals in the attached figures:

[0030] 100. Connection structure between frame plate and ceramic cover; 10. Ceramic cover; 110. First end; 111. Opening; 112. Lower end face; 120. Second end; 121. Through hole; 20. Frame plate; 210. First annular plate; 220. Second annular plate; 221. Bending part; 2211. Inner side surface; 2212. Outer side surface; 2213. Top surface; 2214. Protrusion; 2215. Flat area; 222. Ring body; 2221. Inner wall surface; 2222. Outer wall surface; 223. Reinforcing rib; 30. Solder; 200. Stationary contact; 1. Relay. Detailed Implementation

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] As described in the background section, the welding strength between the insulating cover and the frame in the relays of the related art is not high, which easily leads to cracking, thereby affecting the performance of the relay.

[0038] The applicant conducted a careful study of the above phenomenon. The applicant found that the cracking occurred because the solder tended to rise along the Z-axis (i.e., the height direction of the insulating cover), resulting in insufficient welding area between the top surface of the frame and the lower end surface of the insulating cover, thus affecting the welding strength.

[0039] Based on the above findings, the first aspect of this application proposes a connection structure between the frame and the ceramic cover. The welding strength between the two is good.

[0040] like Figures 1 to 4 As shown, an embodiment of this application provides a connection structure 100 between a ceramic cover 10 and a frame 20, including a ceramic cover 10 and a frame 20. The frame 20 includes a first annular piece 210 and a second annular piece 220. The second annular piece 220 is connected to the first annular piece 210. A bend 221 is provided on the upper edge of the second annular piece 220, and the bend 221 is bent outward in a way that makes the opening of the second annular piece 220 larger. The bend 221 is welded to the lower end face 112 of the ceramic cover 10. Solder 30 is adsorbed at the angle between the bend 221 and the lower end face 112 of the ceramic cover 10.

[0041] The bent portion 221 is welded to the ceramic cover 10. The welding method is not limited; for example, it can be laser welding, brazing, or resistance welding. The bent portion 221 is bent outwards to enlarge the opening of the second annular piece 220. Specifically, the bent portion 221 bends towards the frame piece 20 away from the space it encloses, while also tilting towards the ceramic cover 10. Figure 4 From a medium angle, the bend 221 extends to the upper left.

[0042] like Figure 4 As shown, the bent portion 221 forms an angle with the lower end face 112 of the ceramic cover 10. When the bent portion 221 is welded to the ceramic cover 10, the molten solder 30 can adhere to the angle between the bent portion 221 and the lower end face 112 of the ceramic cover 10. Furthermore, the bent portion 221 is a slope relative to the lower end face 112 of the ceramic cover 10, which reduces the solder 30 climbing up the frame piece 20, allowing the solder 30 to adhere better at the angle between the bent portion 221 and the lower end face 112 of the ceramic cover 10. This increases the welding area between the frame piece 20 and the ceramic cover 10, thereby improving the welding strength between them.

[0043] In this embodiment, the first annular sheet 210 and the second annular sheet 220 are integrally formed. (See reference...) Figures 5 to 7 In another embodiment, the first annular piece 210 and the second annular piece 220 are designed separately, and the first annular piece 210 and the second annular piece 220 are welded together so that the first annular piece 210 and the second annular piece 220 are formed into a single piece.

[0044] refer to Figures 2 to 4 The second annular piece 220 includes a bent portion 221 and an annular body 222. The lower end of the annular body 222 is connected to the first annular piece 210. The upper end of the annular body 222 is connected to the bent portion 221. The bent portion 221 is bent outward relative to the annular body 222 and inclined towards the ceramic cover 10. The bent portion 221 includes an inner side surface 2211, an outer side surface 2212, and a top surface 2213 connecting the inner side surface 2211 and the outer side surface 2212. The inner side surface 2211 faces the lower end surface 112. The inner side surface 2211 is connected to the inner wall surface 2221 of the annular body 222, forming the inner wall of the second annular piece 220; the outer side surface 2212 is connected to the outer wall surface 2222 of the annular body 222, forming the outer wall of the second annular piece 220.

[0045] An angle is formed between the inner surface 2211 and the lower end face 112. Solder 30 is adsorbed in the angle. In a specific configuration, the free end of the inner surface 2211 can abut against the lower end face 112 of the ceramic cover 10, or there can be a gap between the two. The free end of the inner surface 2211 is the end away from the ring body 222.

[0046] Thus, for reference Figure 3 and Figure 4 Along the Z-axis and away from the ceramic cover 10, the inner surface 2211 is a slope. During welding, the angle between the inner surface 2211 and the lower end face 112 can accommodate more solder 30; and the slope can reduce the solder climbing on the frame piece 20 along the Z-axis, so that the solder 30 can be better adsorbed in the angle; thereby improving the welding strength between the frame piece 20 and the ceramic cover 10.

[0047] In other related technologies, the upper edge of the frame is bent inward to form a bend and welded to the lower end face of the ceramic cover. Compared to the inward bending of the frame, reference... Figure 3 The bent portion 221 of this application bends outward, which on the one hand forms a bent portion 221 with a larger diameter, which can better support the ceramic cover 10; on the other hand, while keeping the size of the ceramic cover 10 unchanged, it can make the diameter of the ring 222 smaller, which is conducive to the miniaturization design of the ceramic cover and saves materials. Figure 4 As shown, in order to further improve the welding strength between the frame 20 and the ceramic cover 10, the lower end face 112 and the top face 2213 of the ceramic cover 10 are also connected by solder 30. With this arrangement, the inner and outer sides of the frame 20 are connected to the lower end face 112 of the ceramic cover 10 by solder 30, thereby improving the welding strength between the frame 20 and the ceramic cover 10.

[0048] In this embodiment, as Figure 4 As shown, the inner surface 2211 of the bent portion 221 is curved. For example, the bent portion 221 is an arc-shaped structure, making the inner surface 2211 specifically an arc surface. In this way, along the Z-axis direction and away from the ceramic cover 10, the inner surface 2211 is a slope, which can reduce the solder 30 climbing along the Z-axis direction.

[0049] like Figure 8 As shown, in another embodiment, the inner surface 2211 can also be a wavy surface. The inner surface 2211 has a wavy structure, thereby forming multiple steps. Furthermore, along the Z-axis direction and away from the ceramic cover 10, the multiple steps gradually increase in height, which can reduce the solder 30 climbing up along the Z-axis direction.

[0050] Further, refer to Figure 9 A protrusion 2214 is provided at the connection between the inner side 2211 of the bent portion 221 and the ring body 222. The protrusion 2214 forms a physical barrier between the ring body 222 and the bent portion 221, which can reduce the solder 30 from climbing up along the Z-axis. In addition, the protrusion 2214 can also be replaced by a groove.

[0051] Additionally, a protrusion 2214 or a groove is provided at the connection between the ring 222 and the bent portion 221, which can also be applied to... Figure 8 In an embodiment where the inner surface 2211 is a wavy surface.

[0052] refer to Figure 10 In another embodiment, the inner surface 2211 has a flat area 2215 that extends radially along the through hole 121, and the lower end face 112 rests against the flat area 2215.

[0053] The flat area 2215 can prevent the accumulation of sharp burrs from affecting the surface wettability of the frame piece 20, thereby avoiding affecting the welding quality.

[0054] refer to Figure 10 The portion of the inner surface 2211, excluding the flat area 2215, can be curved or wavy. In this embodiment, the portion of the inner surface 2211, excluding the flat area 2215, has an arc-shaped structure. The curved or wavy design reduces the amount of solder 30 climbing along the Z-axis during welding, allowing the solder 30 to better adhere to the angle between the bent portion 221 and the lower end face 112; thereby improving the welding strength between the frame piece 20 and the ceramic cover 10.

[0055] refer to Figure 10 A reinforcing rib 223 is provided on the outer surface 2212 of the bent portion 221. The reinforcing rib 223 extends to connect with the ring body 222, and is used to enhance the load-bearing capacity of the bent portion 221 from the ceramic cover 10. Specifically, the bent portion 221 is used to connect with the ceramic cover 10 and serves to support the ceramic cover 10. To improve the stability of the support, a reinforcing rib 223 is provided on the outer side of the frame piece 20. The reinforcing rib 223 connects the outer surface 2212 of the bent portion 221 with the outer wall surface 2222 of the ring body 222, thereby improving the connection strength between the bent portion 221 and the ring body 222, and thus improving the stability of the support for the ceramic cover 10.

[0056] In a specific configuration, it can be: a ring of reinforcing ribs 223 is provided on the outer side of the frame piece 20 along its circumference. Alternatively, multiple reinforcing ribs 223 can be provided at intervals along the circumference of the frame piece 20.

[0057] in addition, Figure 10 The reinforcing rib 223 in the middle can be used in Figures 1 to 8 In any of the embodiments involved.

[0058] refer to Figure 11 In another embodiment, both the inner surface 2211 and the outer surface 2212 of the bent portion 221 are inclined surfaces relative to the lower end face 112. In this case, an angle is formed between the inner surface 2211 and the lower end face 112 of the ceramic cover 10, and the inner surface 2211 is still a slope relative to the lower end face 112 of the ceramic cover 10, so that the solder 30 can be better adsorbed in the angle between the bent portion 221 and the lower end face 112; thereby improving the welding strength between the frame piece 20 and the ceramic cover 10.

[0059] In this application, the bent portion 221 is a ring-shaped component with a cross-section that is arc-shaped, a single-peak curve, or an oblique line. (See reference) Figure 2 and Figure 4 The bending part 221 is specifically an arc-shaped ring-shaped part whose cross section along its axial direction is arc-shaped.

[0060] refer to Figures 1 to 3 In another aspect, this application proposes a relay 1, including the connection structure 100 between the ceramic cover 10 and the frame 20 described above. The relay 1 provided in this application is, for example, a relay applicable to electric vehicle charging stations. However, it is understood that it is not limited to relays applicable to electric vehicle charging stations, and this application does not impose any particular limitation in this regard.

[0061] The relay 1 also includes a stationary contact 200, a yoke plate (not shown), and a moving spring (not shown). The yoke plate is connected to the ceramic cover 10 via a frame plate 20. One end of the stationary contact 200 protrudes from the ceramic cover 10, and the other end extends into the ceramic cover 10. Figures 1 to 3 In one embodiment, there are two stationary contacts 200, one for connecting to the load power supply and the other for connecting to the load (e.g., electrical equipment in a vehicle). The moving spring is movable relative to the stationary contact 200 to contact or disengage from one end of the stationary contact 200 that extends into the ceramic cover 10, thereby controlling the on / off state of the circuit between the load power supply and the load.

[0062] Specifically, the ceramic cover 10 forms a receiving cavity with an opening 111 at its first end 110, and the second end 120 of the ceramic cover 10 is provided with a through hole 121 communicating with the receiving cavity. The second end 120 and the first end 110 are aligned axially with each other in the through hole 121. Figure 3 The through holes 121 are arranged relative to each other along the Z-axis direction. There are two through holes 121, which are arranged radially apart. Each of the two through holes 121 is used to set a stationary contact 200.

[0063] 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.

[0064] 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 connection structure between a frame and a ceramic cover, characterized in that, include: Ceramic cover; and The frame includes a first annular piece and a second annular piece, the second annular piece being connected to the first annular piece. The upper edge of the second annular piece is provided with a bend, and the bend is bent outward in a way that makes the opening of the second annular piece larger. The bend is welded to the lower end face of the ceramic cover. Solder can be adsorbed at the angle between the bend and the lower end face of the ceramic cover.

2. The connection structure between the frame and the ceramic cover according to claim 1, characterized in that, The second annular piece includes an annular body, the first annular piece is connected to the lower end of the annular body, and the bent portion is connected to the upper end of the annular body; the bent portion includes an inner side surface, an outer side surface, and a top surface connecting the inner side surface and the outer side surface, and an angle is formed between the inner side surface and the lower end surface of the ceramic cover for adsorbing solder.

3. The connection structure between the frame and the ceramic cover according to claim 2, characterized in that, The inner surface is a curved surface, a wavy surface, or an inclined surface that is tilted relative to the lower end surface of the ceramic cover.

4. The connection structure between the frame and the ceramic cover according to claim 2, characterized in that, The inner side and the connection between the ring body are provided with grooves or protrusions.

5. The connection structure between the frame and the ceramic cover according to claim 2, characterized in that, The inner surface has a flat area, and the lower end face of the ceramic cover rests against the flat area.

6. The connection structure between the frame and the ceramic cover according to claim 5, characterized in that, The flat area is a ring-shaped surface with a planar arrangement on the inner side.

7. The connection structure between the frame and the ceramic cover according to claim 2, characterized in that, The outer surface is provided with reinforcing ribs, which are connected to the ring body. The reinforcing ribs are used to enhance the pressure resistance of the bent portion from the ceramic cover.

8. The connection structure between the frame and the ceramic cover according to claim 1, characterized in that, The bent portion is a ring-shaped component with a cross-section that is arc-shaped, a single-peak curve, or an oblique line.

9. The connection structure between the frame and the ceramic cover according to claim 1, characterized in that, The first annular piece and the second annular piece are integrally formed or welded together.

10. A relay, characterized in that, include: The connection structure between the frame and the ceramic cover as described in any one of claims 1-9.

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