Embedded nut and shell provided with embedded nut

Abstract

The embedded nut comprises a connecting part, a fixing part and a groove part, one end of the groove part is connected with the connecting part, the other end of the groove part is connected with the fixing part, the connecting part is provided with a screw hole, and the groove part is of a solid structure; by adopting the structural arrangement, the screw hole is only positioned in the connecting part, and the groove part is of a solid structure, so that the strength of the groove part is improved, the screw hole is prevented from causing a thin wall phenomenon, the fracture phenomenon is avoided, and in the injection molding process, the colloid can be better matched with the groove part.

Description

Technical Field

[0001] The utility model relates to the field of electrical technology, in particular to an embedded nut and a shell on which the embedded nut is installed. Background Art

[0002] Embedded nuts are mainly used to cooperate with screws. In the electrical field, the housing includes an upper cover and a base, and the embedded nut is embedded in the base. The screw passes through the upper cover and cooperates with the embedded nut to achieve the connection and fixing effect between the upper cover and the base.

[0003] The embedded nut in the prior art is cylindrical, and its structure is as shown in the attached Figure 1 As shown in , the surface of the embedded nut is provided with an annular groove, and the annular groove is used to embed the colloid into the annular groove during the injection molding process, so as to improve the connection and fixing effect between the embedded nut and the base. The embedded nut is provided with a screw hole, and the screw hole axially penetrates the entire embedded nut. However, the problem with this structure is that, since the screw hole is set through, the distance between the inner wall of the screw hole and the bottom surface of the annular groove is very small. It can also be understood that the thickness of the position where the annular groove is located is small, which makes the strength of the position where the annular groove is located low, and it is easy to break during use. The screw and the embedded nut are partially connected, which affects the actual connection and fixing effect. At the same time, during the disassembly process, the embedded nut is easily brought out by the screw, resulting in the separation of the embedded nut and the base, which will also affect the subsequent cooperation between the upper cover and the base. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is how to improve the strength of the embedded nut. To this end, an embedded nut includes:

[0005] A connecting part, a fixing part, and a groove part, wherein one end of the groove part is connected to the connecting part, and the other end of the groove part is connected to the fixing part, the connecting part is provided with a screw hole, and the groove part is a solid structure.

[0006] The shape of the connecting portion is consistent with the shape of the fixing portion; or, the shape of the connecting portion is inconsistent with the shape of the fixing portion.

[0007] The side surface of the connecting portion and the side surface of the fixing portion are arranged coplanarly.

[0008] The length of the connecting portion is greater than the length of the fixing portion.

[0009] The top end of the screw hole is provided with a guide surface.

[0010] A side surface of the connecting portion and / or a side surface of the fixing portion is provided with a knurling structure.

[0011] Therefore, the technical problem to be solved by the utility model is how to improve the strength of the embedded nut. To this end, a housing with an embedded nut installed includes the embedded nut as described above.

[0012] It also includes a body, the body is provided with a fixing cavity, the embedded nut is located in the fixing cavity, and the bottom surface of the fixing part is against the bottom surface of the fixing cavity.

[0013] The fixing cavity comprises an upper hole and a lower hole, the upper hole is communicated with the lower hole, the size of the upper hole is smaller than the size of the lower hole, and the connection between the upper hole and the lower hole abuts against the top surface of the connecting part.

[0014] The technical solution of the utility model has the following advantages:

[0015] 1. The utility model provides an embedded nut, which adopts this structural setting. The screw hole is only located in the connecting part, and the groove part is a solid structure, so that the strength of the groove part is improved, and the screw hole is prevented from causing thin wall phenomenon, thereby avoiding the occurrence of breakage. In addition, during the injection molding process, the colloid can better cooperate with the groove part.

[0016] 2. The utility model provides an embedded nut, in which the shapes of the connecting part and the fixing part may be consistent or inconsistent, so as to meet the needs in different situations.

[0017] 3. The embedded nut provided by the utility model is arranged in a coplanar manner, so that the connecting part and the fixing part have the same shape and size, forming a columnar structure, which is more convenient to process.

[0018] 4. The utility model provides an embedded nut, which increases the length of the screw hole by increasing the length of the connecting portion, thereby satisfying the fit between the screw and the screw hole.

[0019] 5. The utility model provides an embedded nut, in which the setting of the guide surface forms a guiding effect.

[0020] 6. The utility model provides an embedded nut with a knurled structure, which can increase the contact area with the colloid during the injection molding process and improve the connection strength.

[0021] 7. The utility model provides a shell with an embedded nut installed, in which the bottom surface of the fixing part and the bottom surface of the fixing cavity are fitted and abutted against each other, so that the embedded nut is fixed more firmly, and the screw will not pass through the fixing part to connect with the bottom surface of the fixing cavity.

[0022] 8. The utility model provides a shell with an embedded nut installed, wherein the upper hole and the lower hole cooperate to form a stepped structure, and the connection between the upper hole and the lower hole abuts against the top surface of the connecting part to form a local limiting effect to prevent the embedded nut from detaching. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A structural schematic diagram of an embedded nut provided by the utility model;

[0025] Figure 2 A cross-sectional view of an embedded nut provided by the utility model;

[0026] Figure 3 A cross-sectional view of an embedded nut provided by the utility model;

[0027] Figure 4 A structural schematic diagram of an embedded nut provided by the utility model;

[0028] Figure 5 A structural schematic diagram of an embedded nut provided by the utility model;

[0029] Figure 6 The utility model provides a cross-sectional view of a housing with an embedded nut installed.

[0030] Description of reference numerals:

[0031] 11. Connecting portion; 12. Fixing portion; 13. Groove portion; 14. Main body; 111. Screw hole; 112. Guide surface; 141. Fixing cavity; 1411. Upper hole; 1412. Lower hole. DETAILED DESCRIPTION

[0032] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0036] Example 1

[0037] This embodiment provides an embedded nut, as shown in the attached Figure 1-5 As shown, including:

[0038] The connecting portion 11, the fixing portion 12, and the groove portion 13, in this embodiment, from top to bottom in the axial direction are the connecting portion 11, the groove portion 13, and the fixing portion 12, that is, the connecting portion 11 is located at the top of the embedded nut, the groove portion 13 is located in the middle, and the fixing portion 12 is located at the bottom of the embedded nut. One end of the groove portion 13 is connected to the connecting portion 11, and the other end of the groove portion 13 is connected to the fixing portion 12. In this embodiment, the groove portion 13 is specifically a concave shape, and its side surface is concave toward the center. The connecting portion 11 is provided with a screw hole 111, and the screw hole 111 is used to cooperate with a screw. Here, the length of the screw hole 111 can be adjusted according to actual needs, but it should be noted that the screw hole 111 does not pass through the connecting portion 11, that is, the screw hole 111 will not pass through the groove portion 13. The groove portion 13 is a solid structure. With this structural setting, the screw hole 111 is only located in the connecting portion 11, and the groove portion 13 is a solid structure, so that the strength of the groove portion 13 is improved, and the screw hole 111 is prevented from causing a thin wall phenomenon, thereby avoiding the occurrence of breakage, and during the injection molding process, the colloid can better cooperate with the groove portion 13.

[0039] Specifically, as attached Figure 1 ,4 As shown in Figures 5 and 6, the shape of the connecting portion 11 is consistent with the shape of the fixing portion 12, for example, the connecting portion 11 is cylindrical and the fixing portion 12 is also cylindrical; the connecting portion 11 is a regular hexagonal prism and the fixing portion 12 is also a regular hexagonal prism. Alternatively, the shape of the connecting portion 11 is inconsistent with the shape of the fixing portion 12, for example, the connecting portion 11 is cylindrical and the fixing portion 12 is a regular hexagonal prism; or the connecting portion 11 is a regular pentagonal prism and the fixing portion 12 is a regular hexagonal prism. The shapes of the connecting portion 11 and the fixing portion 12 can be consistent or inconsistent to meet the needs in different situations.

[0040] Specifically, as attached Figure 1-4 As shown, the side of the connecting portion 11 and the side of the fixing portion 12 are coplanar. The coplanar arrangement allows the connecting portion 11 and the fixing portion 12 to have the same shape and size, forming a cylindrical structure, which is more convenient to process. For example, the connecting portion 11 is cylindrical, the fixing portion 12 is also cylindrical, and the cross-sectional dimensions of the two are equal. For another example, the connecting portion 11 is a regular hexagonal prism, and the fixing portion 12 is also a regular hexagonal prism. The six sides of the two are one-to-one located on the same plane. At this time, the cross-sectional dimensions of the connecting portion 11 are equal to the cross-sectional dimensions of the fixing portion 12. In this embodiment, the example in which the connecting portion 11 and the fixing portion 12 are both cylindrical is used for description. In addition, the shapes of the connecting portion 11 and the fixing portion 12 may also be different.

[0041] Specifically, the fixing portion 12 is also a solid structure, so that the groove portion 13 and the fixing portion 12 are both solid, further improving the strength of the embedded nut. In addition, in order to increase the contact area, a groove can also be provided on the bottom surface of the fixing portion 12 so that the colloid enters the groove.

[0042] Specifically, the length of the connecting portion 11 is greater than the length of the fixing portion 12. By increasing the length of the connecting portion 11, the length of the screw hole 111 is increased, thereby satisfying the fit between the screw and the screw hole 111. Here, the length of the connecting portion 11 and the length of the screw hole 111 can be adjusted according to actual needs.

[0043] Specifically, as attached Figure 3 As shown, a guide surface 112 is provided at the top of the screw hole 111. The setting of the guide surface 112 forms a guiding effect. Here, the guide surface 112 can be a curved surface or an inclined surface.

[0044] Specifically, a knurling structure is provided on the side of the connecting portion 11 and / or the side of the fixing portion 12. Here, the side of the connecting portion 11 may be provided with a knurling structure, and the side of the fixing portion 12 may be smooth; the side of the fixing portion 12 may be provided with a knurling structure, and the side of the connecting portion 11 may be smooth; or both the side of the connecting portion 11 and the side of the fixing portion 12 may be provided with a knurling structure. The provision of the knurling structure can increase the contact area with the colloid during the injection molding process, thereby improving the connection strength. In addition, a number of convex ribs may be provided on the side of the connecting portion 11 and the side of the fixing portion 12, thereby increasing the contact area with the colloid and improving the connection strength.

[0045] Specifically, the connecting portion 11, the fixing portion 12, and the groove portion 13 are integrally formed. In this embodiment, the embedded nut is made of metal material to further improve the overall strength.

[0046] Example 2

[0047] This embodiment provides a housing with an embedded nut installed, as shown in the attached Figure 6 As shown, including:

[0048] Embedded nut: The specific structure of the embedded nut has been described in detail in Example 1, so it will not be described in detail in this embodiment.

[0049] Specifically, it also includes a body 14, where the body 14 can be a base or other plastic parts. The embedded nut in this embodiment can be used for electrical products such as small circuit breakers, molded case circuit breakers, etc. The body 14 is provided with a fixing cavity 141, and the embedded nut is located in the fixing cavity 141, and the bottom surface of the fixing portion 12 is against the bottom surface of the fixing cavity 141. The bottom surface of the fixing portion 12 is in contact with the bottom surface of the fixing cavity 141, so that the embedded nut is fixed more firmly, and the screw will not pass through the fixing portion 12 and connect with the bottom surface of the fixing cavity 141.

[0050] Specifically, the fixing cavity 141 includes an upper hole 1411 and a lower hole 1412, the upper hole 1411 is connected to the lower hole 1412, the size of the upper hole 1411 is smaller than the size of the lower hole 1412, and the connection between the upper hole 1411 and the lower hole 1412 abuts against the top surface of the connecting portion 11. The embedded nut is entirely located in the lower hole 1412, so that the bottom surface of the fixing portion 12 abuts against the bottom surface of the lower hole 1412, and the top surface of the connecting portion 11 abuts against the connection between the upper hole 1411 and the lower hole 1412. The upper hole 1411 and the lower hole 1412 cooperate to form a stepped structure, and the connection between the upper hole 1411 and the lower hole 1412 abuts against the top surface of the connecting portion 11, forming a local limiting effect to prevent the embedded nut from detaching.

[0051] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. An embedded nut, characterized in that: include: A connecting portion (11), a fixing portion (12), and a groove portion (13), wherein one end of the groove portion (13) is connected to the connecting portion (11), and the other end of the groove portion (13) is connected to the fixing portion (12), the connecting portion (11) is provided with a screw hole (111), and the groove portion (13) is a solid structure.

2. The embedded nut according to claim 1, characterized in that: The shape of the connecting portion (11) is consistent with the shape of the fixing portion (12); or the shape of the connecting portion (11) is inconsistent with the shape of the fixing portion (12).

3. The embedded nut according to claim 2, characterized in that: The side surface of the connecting portion (11) and the side surface of the fixing portion (12) are arranged coplanarly.

4. The embedded nut according to claim 1, characterized in that: The length of the connecting portion (11) is greater than the length of the fixing portion (12).

5. The embedded nut according to claim 1, characterized in that: A guide surface (112) is provided at the top end of the screw hole (111).

6. The embedded nut according to claim 1, characterized in that: A knurled structure is provided on the side surface of the connecting portion (11) and / or the side surface of the fixing portion (12).

7. A housing with an embedded nut installed, characterized in that: Comprising the embedded nut as described in any one of claims 1-6.

8. The housing with an embedded nut installed according to claim 7, characterized in that: It also comprises a body (14), the body (14) being provided with a fixing cavity (141), the embedded nut being located in the fixing cavity (141), and the bottom surface of the fixing portion (12) being against the bottom surface of the fixing cavity (141).

9. The housing with an embedded nut installed according to claim 8, characterized in that: The fixing cavity (141) comprises an upper hole (1411) and a lower hole (1412); the upper hole (1411) is connected to the lower hole (1412); the size of the upper hole (1411) is smaller than the size of the lower hole (1412); and the connection between the upper hole (1411) and the lower hole (1412) abuts against the top surface of the connecting portion (11).

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