Alternating current contactor shell boss structure and alternating current contactor

Abstract

The utility model relates to an alternating current contactor shell boss structure and an alternating current contactor, the boss structure is used for being installed at the joint of a shell and a static contact plate of the alternating current contactor, the joint of the shell and the static contact plate is provided with a groove, and the alternating current contactor shell boss structure comprises a heat-resistant boss matched with the groove. The heat-resistant boss is located at the joint of the shell and the static contact plate. Compared with the prior art, the alternating current contactor shell has the advantages that the short-time overload current tolerance capability of the alternating current contactor shell is improved, the problem of opening range over-travel change caused by support position melting can be prevented, and the alternating current contactor shell is convenient and stable to assemble and the like.

Description

Technical Field

[0001] The utility model relates to the field of AC contactors, in particular to an AC contactor housing boss structure and an AC contactor. Background Art

[0002] During the use of AC contactors, especially those with relatively large current, if a short circuit or short-term overload occurs, a large amount of heat will be generated at the contact point of the contactor, which may easily cause the contact point between the shell and the contact plate to melt, reduce the overtravel of the contactor, and shorten the service life of the contactor.

[0003] For example, a contactor and its shell structure disclosed in the utility model with authorization announcement number CN217641138U include a shell body, on which are provided a plurality of mounting seats for mounting a stationary contact plate, and a heat dissipation structure is provided on the mating surface of the mounting seat for contacting the stationary contact plate; the heat dissipation structure includes at least one heat dissipation through hole provided on the mounting seat, and one end of the heat dissipation through hole is opposite to the plate surface of the stationary contact plate.

[0004] If a short circuit or short-term overload occurs in this structure, a large amount of heat will be generated at the contact point of the contactor, which may easily cause the contact point between the shell and the contact plate to melt.

[0005] In this regard, the current AC contactor housing is configured as follows:

[0006] 1. When the current is higher than 100A, the entire shell is made of thermosetting plastic to prevent the shell from melting when the contactor is overloaded;

[0007] 2. When the current is lower than 100A, relatively high temperature resistant plastic parts can be used as the shell to minimize the melting of the shell.

[0008] If relatively high temperature resistant materials or thermosetting plastics are used for the entire housing, the cost will be greatly increased. Utility Model Content

[0009] The purpose of the utility model is to provide an AC contactor housing boss structure and an AC contactor in order to overcome the defect of the prior art that the entire housing uses relatively high temperature resistant materials or thermosetting plastics, which greatly increases the cost.

[0010] The purpose of the utility model can be achieved through the following technical solutions:

[0011] A boss structure for an AC contactor housing is used to be installed at the connection between the housing and a static contact plate of the AC contactor. The connection between the housing and the static contact plate is provided with a groove. The boss structure for the AC contactor housing includes a heat-resistant boss that matches the groove. The heat-resistant boss is located between the connection between the housing and the static contact plate.

[0012] Furthermore, the heat-resistant boss is made of a thermosetting material or a thermoplastic material with a melting point higher than 250°C.

[0013] Furthermore, the heat-resistant boss is also provided with a tail wing, and the shell is also provided with a slide groove matched with the tail wing, and the tail wing is distributed along the slide groove.

[0014] Furthermore, the tail wing includes a first tail wing and a second tail wing respectively connected to two ends of the heat-resistant boss, so that the boss structure of the AC contactor housing forms a Y-shaped structure.

[0015] Furthermore, the first tail wing and the second tail wing are both provided with a convex bump facing the shell, and the convex bump is interference fit with the shell.

[0016] Furthermore, the convex bump is located at the end of the first tail wing and the second tail wing away from the heat-resistant boss.

[0017] Furthermore, the number of the heat-resistant bosses is one or more. When the number of the heat-resistant bosses is multiple, each heat-resistant boss is distributed independently, or each heat-resistant boss is distributed in sequence, and the ends of two adjacent heat-resistant bosses are connected to each other.

[0018] Furthermore, the heat-resistant bosses connected to each other are an integrally formed structure.

[0019] The utility model also provides an AC contactor, comprising a shell and a static contact plate, and also comprising an AC contactor shell boss structure as described above, wherein the AC contactor shell boss structure is located between the connection between the shell and the static contact plate.

[0020] Furthermore, the static contact plate is fixed to the housing by screws passing through the heat-resistant boss, and the heat-resistant boss is provided with a through hole matched with the screw.

[0021] Compared with the prior art, the utility model has the following advantages:

[0022] (1) The utility model provides a groove between the housing and the static contact plate of the AC contactor, and places a heat-resistant boss having a thermosetting or high-melting-point thermoplastic material in the groove to support the static contact plate, thereby increasing the heat dissipation effect of the contactor, improving the short-term overload current tolerance of the AC contactor housing, and preventing the problem of the opening distance overtravel change caused by the melting of the support position.

[0023] (2) The utility model provides tail wings on both sides of the heat-resistant boss, and correspondingly provides a slide groove on the shell. During installation, the heat-resistant boss is inserted into the groove of the shell along the assembly opening of the slide groove, which is convenient for the installation of the heat-resistant boss. After installation, the tail wing is located in the slide groove, which plays a role of up and down positioning, thereby preventing the boss from falling off when the contact plate fixing screws are tightened upside down, thereby affecting the assembly efficiency.

[0024] (3) The utility model also provides a convex bump on the outer side of the tail wing, which can be clamped with the heat-resistant boss by interference fit with the shell to prevent the static contact plate from retreating and falling off during the installation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of a housing structure of a boss structure of an AC contactor housing provided in an embodiment of the utility model;

[0026] Figure 2 It is a schematic diagram of the assembly state of a boss structure of an AC contactor housing provided in an embodiment of the utility model;

[0027] Figure 3 A schematic diagram of a heat-resistant boss structure of an AC contactor housing boss structure provided in an embodiment of the utility model;

[0028] Figure 4 This is a schematic diagram of the overall effect of an AC contactor provided in an embodiment of the utility model;

[0029] Figure 5 This is a schematic diagram of the connection and installation state of three heat-resistant bosses provided in an embodiment of the utility model;

[0030] In the figure, 1, shell, 2, slide groove, 3, groove, 4, heat-resistant boss, 5, tail wing. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0034] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0035] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0036] Example 1

[0037] like Figure 1 and Figure 2 As shown, this embodiment provides an AC contactor housing boss structure, which is used to be installed at the connection between the housing 1 and the static contact plate of the AC contactor. The connection between the housing 1 and the static contact plate is provided with a groove 3. The AC contactor housing boss structure includes a heat-resistant boss 4 that cooperates with the groove 3. The heat-resistant boss 4 is located between the connection between the housing 1 and the static contact plate.

[0038] The heat-resistant boss 4 is made of a thermosetting material or a thermoplastic material with a melting point higher than 250° C., preferably a thermosetting material such as a thermosetting plastic.

[0039] In this solution, a groove 3 is set between the shell 1 of the AC contactor and the static contact plate. A heat-resistant boss 4 with a thermosetting or high-melting-point thermoplastic material is placed in the groove 3 to support the static contact plate, thereby increasing the heat dissipation effect of the contactor, improving the short-term overload current tolerance of the AC contactor shell, and preventing the problem of over-travel change of the opening distance caused by melting of the support position.

[0040] The number of the heat-resistant bosses 4 can be one or more, and the specific number can be set according to the number of connection points with the static contact plate in the housing 1.

[0041] The shape of the heat-resistant boss 4 can be set according to the specific shape of the connection between the shell 1 and the static contact plate, and it only needs to be able to support the static contact plate. In this embodiment, the heat-resistant boss 4 includes a main body section of the transverse part and a raised section raised along the middle of the main body section. The raised section is a straight rod-shaped structure with a circular raised top.

[0042] As a preferred embodiment, Figure 3 As shown, in order to facilitate the installation of the heat-resistant boss 4, the heat-resistant boss 4 is also provided with a tail 5, and the housing 1 is also provided with a slide 2 that matches the tail 5, and the tail 5 is distributed along the slide 2. The heat-resistant boss 4 can be inserted into the groove 3 along the assembly opening of the slide 2, and the arrangement of the tail 5 facilitates the guidance and installation of the heat-resistant boss 4.

[0043] The shape of the tail 5 can be set according to the specific layout of the corresponding area of ​​the shell 1 without limitation. In this embodiment, the tail 5 includes a first tail and a second tail respectively connected to the two ends of the heat-resistant boss 4, so that the boss structure of the AC contactor shell forms a Y-shaped structure.

[0044] Specifically, the first tail wing and the second tail wing are respectively located at the two ends of the main section of the heat-resistant boss 4 and are vertically connected to the main section. The first tail wing and the second tail wing are both straight rod structures; the slide grooves 2 are correspondingly set to two, which respectively match the shapes, sizes and positions of the first tail wing and the second tail wing.

[0045] The tail wing 5 in the slide groove 2 can also play a role of up and down positioning to prevent the heat-resistant boss 4 from falling off when the contact plate fixing screws are tightened upside down, thereby affecting the assembly efficiency.

[0046] Preferably, the first tail wing and the second tail wing are both provided with a convex bump facing the housing 1, and the convex bump is interference fit with the housing 1. The heat-resistant boss 4 is clamped by the convex bumps on the first tail wing and the second tail wing and the housing 1 through interference fit, so as to prevent the static contact plate from falling off due to the boss retreat 4 during installation.

[0047] The convex bump is preferably located at the end of the first tail wing and the second tail wing away from the heat-resistant boss 4, which is convenient for assembly and provides a greater clamping force.

[0048] The number of the heat-resistant bosses 4 is one or more. When the number of the heat-resistant bosses 4 is multiple, each heat-resistant boss 4 can be distributed independently; or each heat-resistant boss 4 can be distributed in sequence, and the ends of two adjacent heat-resistant bosses 4 are connected to each other.

[0049] The heat-resistant bosses 4 connected to each other can be selected as an integrally formed structure for easy installation.

[0050] In this embodiment, a total of six heat-resistant bosses 4 are provided, which are respectively installed at six connection points between the housing 1 and the static contact plate. Among the six heat-resistant bosses 4, three bosses can be provided for connection installation, such as Figure 5shown.

[0051] In addition, this embodiment also provides an AC contactor, such as Figure 4 As shown, it includes a housing 1, a static contact plate and an AC contactor housing boss structure as described above, wherein the AC contactor housing boss structure is located between the connection between the housing 1 and the static contact plate.

[0052] In this embodiment, the static contact plate is fixed to the shell 1 by screws passing through the heat-resistant boss 4, and the heat-resistant boss 4 is provided with a through hole matching the screw; that is, the screw passes through the through holes of the static contact plate and the heat-resistant boss 4 and is installed in the threaded hole of the shell 1.

[0053] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. An AC contactor housing boss structure, used for installation at the connection between the housing (1) and the static contact plate of the AC contactor, characterized in that: A groove (3) is provided at the connection between the shell (1) and the static contact plate, and the AC contactor shell boss structure comprises a heat-resistant boss (4) matched with the groove (3), and the heat-resistant boss (4) is located between the connection between the shell (1) and the static contact plate.

2. The AC contactor housing boss structure according to claim 1, characterized in that: The heat-resistant boss (4) is made of a thermosetting material or a thermoplastic material with a melting point higher than 250°C.

3. The AC contactor housing boss structure according to claim 1, characterized in that: The heat-resistant boss (4) is also provided with a tail wing (5), and the housing (1) is also provided with a slide groove (2) matched with the tail wing (5), and the tail wing (5) is distributed along the slide groove (2).

4. The AC contactor housing boss structure according to claim 3, characterized in that: The tail wing (5) comprises a first tail wing and a second tail wing respectively connected to two ends of the heat-resistant boss (4), so that the AC contactor housing boss structure forms a Y-shaped structure.

5. The AC contactor housing boss structure according to claim 4, characterized in that: The first tail wing and the second tail wing are both provided with a convex bump facing the housing (1), and the convex bump is interference fit with the housing (1).

6. The AC contactor housing boss structure according to claim 5, characterized in that: The convex bump is located at the end of the first tail wing and the second tail wing away from the heat-resistant boss (4).

7. The AC contactor housing boss structure according to claim 1, characterized in that: The number of the heat-resistant bosses (4) is one or more. When the number of the heat-resistant bosses (4) is more than one, each heat-resistant boss (4) is independently distributed, or each heat-resistant boss (4) is distributed in sequence, and the ends of two adjacent heat-resistant bosses (4) are connected to each other.

8. The AC contactor housing boss structure according to claim 7, characterized in that: The heat-resistant bosses (4) connected to each other are an integrally formed structure.

9. An AC contactor, comprising a housing (1) and a static contact plate, characterized in that: It also comprises an AC contactor housing boss structure as claimed in any one of claims 1 to 8, wherein the AC contactor housing boss structure is located between the connection between the housing (1) and the static contact plate.

10. An AC contactor according to claim 9, characterized in that: The static contact plate is fixed to the housing (1) by screws passing through the heat-resistant boss (4), and the heat-resistant boss (4) is provided with a through hole that matches the screw.

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