Housing

Abstract

The utility model relates to a housing. The housing comprises a housing body, a high rib group and a low rib group, wherein the high rib groups and the low rib groups extend forwards from the side wall of the housing body, the extension length of the high rib groups is larger than that of the low rib groups, the plurality of high rib groups and the plurality of low rib groups are sequentially and alternately arranged at intervals along the longitudinal direction, mounting cavities are formed at intervals, the height of the mounting cavities is smaller than the thickness of an arc chute, and the height of the mounting cavities is smaller than the thickness of the arc chute. And the arc chute can be embedded in the mounting cavity in an interference manner. Compared with the prior art, according to the utility model, the two side ribs and the arc chute are in interference fit and fastened in assembly, and the mounting ribs are arranged in a length staggered manner, so that the structure is reasonable and compact, and the effects of relatively low cost and convenience in demolding are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit breakers and relates to a cover shell. Background Art

[0002] The zero arc shield of the plastic case circuit breaker is generally installed at the terminal block of the incoming terminal. When the built-in arc extinguishing grid of the circuit breaker cannot completely block the arc from flying out of the circuit breaker, the arc splash is further blocked by installing the zero arc shield externally. For example, CN202320596282 discloses a zero arc shield, including a shield body and a plurality of installation cavities spaced apart on the shield body and arc extinguishing grids installed therein. The length of the installation ribs before and after the installation cavities is too long and the distribution of the installation rib structure is unreasonable, which will increase the cost and make demoulding difficult. Utility Model Content

[0003] The purpose of the utility model is to provide a cover shell, which is assembled by using interference fit between the mounting ribs and the arc extinguishing grid, and the metal mesh and the grid are also fastened by interference fit. At the same time, the mounting rib structure is arranged in a staggered length, which is reasonable and compact, achieving the effect of relatively low cost and easy demolding.

[0004] The purpose of the utility model can be achieved through the following technical solutions:

[0005] A cover shell includes a cover shell body, a high rib group and a low rib group;

[0006] The high rib group and the low rib group extend forward from the side wall of the cover body, the extension length of the high rib group is greater than that of the low rib group, and multiple high rib groups and multiple low rib groups are alternately arranged in sequence along the longitudinal direction to form an installation cavity at the interval, and the height of the installation cavity is less than the thickness of the arc extinguishing grid, so that the arc extinguishing grid can be inserted into the installation cavity with interference fit.

[0007] Furthermore, the high rib group includes a pair of high ribs arranged in parallel transversely.

[0008] Furthermore, a high-rib rear transverse plate connecting a pair of high ribs is also provided on the side wall of the cover shell body.

[0009] Furthermore, the low rib group includes a pair of low ribs arranged in parallel in the transverse direction.

[0010] Furthermore, the front end of the low rib is provided with chamfers along both sides in the longitudinal direction.

[0011] Furthermore, a low-rib rear transverse plate connecting a pair of low ribs is also provided on the side wall of the cover shell body.

[0012] Furthermore, the extension length of the high rib group is smaller than the length of the arc extinguishing grid, so that the front side of the arc extinguishing grid extends out of the installation cavity.

[0013] Furthermore, the casing body includes a bottom plate along the longitudinal direction.

[0014] Furthermore, an arc-isolating net is provided on the high-rib group located at the bottom among the plurality of high-rib groups, and the arc-isolating net is provided between the high-rib group and the arc-extinguishing grid in the corresponding cavity.

[0015] Furthermore, a plurality of partitions are arranged in parallel and at intervals in the transverse direction on the bottom plate, and the space on the bottom plate is divided into a plurality of arc extinguishing chambers by the plurality of partitions.

[0016] The high rib group and the low rib group are arranged on adjacent partitions.

[0017] Furthermore, the bottom plate is provided with a plurality of through holes.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] 1) The mounting ribs of the housing in the utility model adopt a high-low rib structure, while the prior art uses several pairs of mounting rib structures of the same length and a longer length, which makes demolding relatively difficult and uses a relatively large amount of material. Compared with the prior art, the utility model can achieve the same fastening effect when installing the arc extinguishing grid, but in terms of manufacturing, for injection molding molds, the high-low rib structure is more convenient when demolding and has a lower manufacturing cost.

[0020] 2) In the utility model, the installation cavity of the cover shell is formed between each installation rib, while the prior art sets the installation rib and the installation cavity at intervals. Therefore, the utility model has a lower cost when installing the same number of arc extinguishing grids, is more compact as a whole, and can achieve the same effect as the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of a zero arcing cover in the utility model;

[0022] Figure 2 This is a front view of a zero arcing cover in the utility model;

[0023] Figure 3 for Figure 2 Middle AA section view;

[0024] Description of the markings in the figure:

[0025] 1. Casing body; 11. Low rib group; 12. High rib group; 13. Installation cavity; 2. Arc extinguishing grid; 21. First arc extinguishing grid; 3. Arc isolation net. DETAILED DESCRIPTION

[0026] The following embodiments are implemented based on the above technical solution of the utility model, and provide detailed implementation methods and specific operation processes, but the protection scope of the utility model is not limited to the following embodiments.

[0027] 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.

[0028] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0029] Example:

[0030] like Figure 1 A zero arcing cover shown in the figure comprises a cover body 1, a low rib group 11, a high rib group 12, a mounting cavity 13, an arc extinguishing grid 2, a first arc extinguishing grid 21, and an arc isolation net 3;

[0031] The high rib group 12 and the low rib group 11 extend forward from the side wall of the housing body 1, and the extension length of the high rib group 12 is greater than that of the low rib group 11. A plurality of high rib groups 12 and a plurality of low rib groups 11 are alternately arranged in sequence along the longitudinal direction to form an installation cavity 13 at the intervals. The height of the installation cavity 13 is less than the thickness of the arc extinguishing grid 2, so that the arc extinguishing grid 2 can be interference-embedded in the installation cavity 13.

[0032] In some specific embodiments, the high rib group 12 includes a pair of high ribs arranged in parallel transversely, and the low rib group 11 includes a pair of low ribs arranged in parallel transversely. The arc extinguishing grid 2 is fixed by interference clamping through the high and low rib group structures on both sides.

[0033] In some specific embodiments, the front end of the low rib is chamfered along both sides in the longitudinal direction to facilitate the insertion of the arc extinguishing grid 2 into the installation cavity 13. For example, the front end of the low rib is in the shape of a flat triangular prism.

[0034] In some specific embodiments, a high-rib rear transverse plate connected to a pair of high ribs is further provided on the side wall of the housing body 1; a low-rib rear transverse plate connected to a pair of low ribs is further provided on the side wall of the housing body 1. The high-rib rear transverse plate is connected to the pair of high ribs to form a U-shaped mounting groove, and similarly, the low-rib rear transverse plate is connected to the pair of high ribs to form a U-shaped mounting groove, and the installation stability of the arc extinguishing grid 2 is improved by three-side fixing.

[0035] In some specific embodiments, the extension length of the high rib group 12 is smaller than the length of the arc extinguishing grid 2 , so that the front side of the arc extinguishing grid 2 extends out of the installation cavity 13 , so as to facilitate the loading and unloading of the arc extinguishing grid 2 .

[0036] In some specific embodiments, the housing body 1 includes a bottom plate along the longitudinal direction.

[0037] In some specific embodiments, an arc-isolating net 3 is provided on the high-rib group 12 at the bottom among the plurality of high-rib groups 12 , and the arc-isolating net 3 is provided between the high-rib group 12 and the arc-extinguishing grid 2 in the corresponding cavity.

[0038] In some specific embodiments, a plurality of partitions are arranged in parallel and at intervals in the transverse direction on the bottom plate, and the space on the bottom plate is divided into a plurality of arc extinguishing chambers by the plurality of partitions, and the high rib group 12 and the low rib group 11 are arranged on adjacent partitions.

[0039] In some specific embodiments, a plurality of through holes are disposed on the bottom plate.

[0040] like Figure 3 As shown: the housing adopts a high-low rib structure, and a chamfer is set at the front end of the low rib part, and the spacing between the installation cavity 13 formed by the high rib and the low rib is smaller than the thickness of the arc extinguishing grid 2, so that the arc extinguishing grid 2 is installed by interference fastening between the low rib and the high rib. The arc isolation net 3 and the first arc extinguishing grid 21 are installed between the housing wall and the first pair of high and low ribs by interference fastening.

[0041] like Figure 2 As shown: each of the above-mentioned installation cavities 13 is formed by staggered arrangement of high ribs and low ribs in sequence, and multiple installation cavities 13 are formed by multiple groups of installation ribs. The arc extinguishing grid 2 is installed in each installation cavity 13 in sequence and the high ribs and low ribs of the installation cavity are squeezed to tighten it.

[0042] This embodiment uses the interference assembly method of the high-low rib structure, which is relatively low in cost and easy to assemble. No other materials are needed to assist in fastening. The arc extinguishing grid 2 can be installed according to the needs of the user to achieve the same effect as other similar products. In addition, the high-low rib structure of the housing of this embodiment is convenient for demoulding of injection molded parts and has a low cost. In addition, the arrangement structure of the housing installation cavity is more reasonable, and the overall structure is more compact under the same arc extinguishing effect.

[0043] The above description of the embodiments is to facilitate the understanding and use of the utility model by those skilled in the art. It is obvious that those familiar with the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the utility model is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the utility model without departing from the scope of the utility model should be within the scope of protection of the utility model.

Claims

1. A housing, characterized in that: It comprises a housing body (1), a high rib group (12) and a low rib group (11); The high rib group (12) and the low rib group (11) extend forward from the side wall of the housing body (1); the extension length of the high rib group (12) is greater than that of the low rib group (11); a plurality of high rib groups (12) and a plurality of low rib groups (11) are alternately arranged in sequence along the longitudinal direction, and a mounting cavity (13) is formed at the intervals; the height of the mounting cavity (13) is less than the thickness of the arc extinguishing grid (2), so that the arc extinguishing grid (2) can be interference-embedded in the mounting cavity (13).

2. The housing according to claim 1, characterized in that: The high rib group (12) comprises a pair of high ribs arranged in parallel in the transverse direction.

3. The cover according to claim 2, characterized in that: The side wall of the housing body (1) is also provided with a high-rib rear transverse plate connected to a pair of high ribs.

4. The housing according to claim 1, characterized in that: The low rib group (11) comprises a pair of low ribs arranged in parallel in the transverse direction.

5. The housing according to claim 4, characterized in that: A low-rib rear transverse plate connecting a pair of low ribs is also provided on the side wall of the housing body (1).

6. The cover according to claim 4, characterized in that: The front end of the low rib is provided with chamfers along both sides in the longitudinal direction.

7. The housing according to claim 1, characterized in that: The extension length of the high rib group (12) is less than the length of the arc extinguishing grid (2), so that the front side of the arc extinguishing grid (2) extends out of the installation cavity (13).

8. The housing according to claim 1, characterized in that: The casing body (1) comprises a bottom plate in the longitudinal direction.

9. The housing according to claim 8, characterized in that An arc isolation net (3) is provided on a high rib group (12) located at the bottom among the plurality of high rib groups (12), and the arc isolation net (3) is arranged between the high rib group (12) and an arc extinguishing grid (2) in a corresponding cavity.

10. The housing according to claim 8, characterized in that A plurality of partitions are arranged in parallel and at intervals along the bottom plate in a transverse direction, and the space on the bottom plate is divided into a plurality of arc extinguishing chambers by the plurality of partitions. The high rib group (12) and the low rib group (11) are arranged on adjacent partitions.

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