Threaded connection assembly and electric appliance box

Abstract

The utility model provides a threaded connection assembly and an electric appliance box. The threaded connection assembly comprises a screw and an embedded nut. The embedded nut is provided with a threaded hole connected with the screw in a matched mode. An annular boss is formed on the peripheral side surface of the embedded nut; the multiple annular bosses are arranged at intervals along the central axis, and annular grooves are formed between the adjacent annular bosses. The connection stability of the joint of the embedded nut and the base can be enhanced, and reliable fixation of the embedded nut can be achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical appliance boxes, in particular to a threaded connection assembly and an electrical appliance box. BACKGROUND

[0002] The electrical control box is usually made of plastic structure, in which heavy electronic components such as reactors need to be installed. According to the knowledge of the inventor, in order to fix the heavy structure, the prior art is to form a connecting hole on the plastic structure, then embed a nut into the connecting hole, replace the original plastic thread on the nut with a metal thread of the nut, and then use a screw to fix the heavy structure. However, since the nut bearing part is still plastic, creep will still occur during long-term use, which will cause the nut to be loose. CONTENT OF THE UTILITY MODEL

[0003] The present application aims to provide a threaded connection assembly and an electrical appliance box, which can enhance the connection stability of the embedded nut, prevent the embedded nut from falling out of the connecting hole, and realize reliable fixation of the embedded nut.

[0004] The first aspect of the present application provides a threaded connection assembly, comprising a screw and an embedded nut; the embedded nut is provided with a threaded hole matched with the screw; the outer peripheral side surface of the embedded nut is formed with two or more annular bosses arranged along the central axis of the embedded nut; and an annular groove is formed between adjacent annular bosses.

[0005] The above technical solution can know that the outer peripheral side surface of the embedded nut is formed with two or more annular bosses arranged along the central axis of the embedded nut; and an annular groove is formed between adjacent annular bosses. When the embedded nut is used, the embedded nut is at least partially embedded in the nut bearing structure, at least part of the annular boss surface of the outer peripheral side surface of the embedded nut abuts against the inner side surface of the connecting hole on the nut bearing structure, and the inner side surface of the connecting hole at least partially extends into the annular groove space. The connection stability of the embedded nut can be enhanced, the embedded nut can be prevented from falling out of the connecting hole, and reliable fixation of the embedded nut can be realized.

[0006] The second aspect of the application provides an electric appliance box, comprising a base and a threaded connection assembly; the threaded connection assembly comprises a screw and an embedded nut; the embedded nut is provided with a threaded hole matched with the screw; the outer circumferential side of the embedded nut is formed with two or more annular bosses arranged along the central axis of the embedded nut; an annular groove is formed between adjacent annular bosses; the base is provided with a connecting hole, at least part of the annular boss surface on the outer circumferential side of the embedded nut abuts against the inner side surface of the connecting hole, and the inner side surface of the connecting hole at least partially extends into the annular groove space; the base is arranged with electronic components, and the screw passes through the connecting part of the electronic components and is connected with the embedded nut.

[0007] The beneficial effects of the embodiments of the application include:

[0008] The outer circumferential side of the embedded nut of the embodiments of the application is formed with two or more annular bosses arranged along the central axis, and an annular groove is formed between adjacent annular bosses. The base is provided with a connecting hole, and at least part of the annular boss surface on the outer circumferential side of the embedded nut of the embedded nut of the embodiments of the application abuts against the inner side surface of the connecting hole, and the inner side surface of the connecting hole at least partially extends into the annular groove space. The connection stability of the embedded nut can be enhanced, the embedded nut can be prevented from falling off, and reliable fixation of the embedded nut can be achieved. The electric control box of the embodiments of the application is internally installed with the threaded connection assembly described above, the embedded nut can be reliably and stably connected with the base in the electric control box, and the embodiments of the application can achieve reliable fixation of electronic components in long-term use. BRIEF DESCRIPTION OF DRAWINGS

[0009] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0010] Figure 1 It is a structural schematic diagram of the base in the electric control box of the embodiments of the application.

[0011] Figure 2 It is a structural schematic diagram of the base in the electric control box of the embodiments of the application.

[0012] Figure 3 It is a structural schematic diagram of the threaded connection assembly of the embodiments of the application.

[0013] Figure 4 It is a structural schematic diagram of the threaded connection assembly of the embodiments of the application.

[0014] Figure 5 Fig. 3 is a structural schematic diagram of a third embodiment of the threaded connection assembly of the present application;

[0015] Figure 6 Fig. 4 is a structural schematic diagram of a third embodiment of the base in the electric control box of the present application;

[0016] Figure 7 Fig. 5 is a structural schematic diagram of a fourth embodiment of the base in the electric control box of the present application;

[0017] Figure 8 Fig. 6 is a structural schematic diagram of the reinforcing ribs on the base of the present application;

[0018] Figure 9 Fig. 7 is a structural schematic diagram of a fifth embodiment of the base in the electric control box of the present application.

[0019] Fig. 8 is a structural schematic diagram of the electric control box of the present application;

[0020] 100 - threaded connection assembly; 101 - screw; 102 - embedded nut; 103 - base; 104 - annular boss; 105 - anti-skid strip; 106 - annular groove; 107 - connecting hole; 108 - electronic component; 109 - protruding column; 110 - reinforcing rib; 111 - peripheral annular sleeve; 112 - counterbore; 113 - flange structure. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.

[0023] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, the terms "first", "second", "third" and the like are only used to distinguish description, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present application, it is also necessary to explain that, unless otherwise explicitly specified and limited, the terms "set", "install", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] To solve the problems in the background art, the present application provides a threaded connection assembly 100 and an electric control box.

[0026] Referring to Figure 1 , Figure 2 , Figure 3 and Figure 4 , the present application provides a threaded connection assembly 100, which comprises a screw 101 and an embedded nut 102; the embedded nut 102 is provided with a threaded hole matched with the screw 101; the embedded nut 102 is used to be embedded on a base 103 in the electric control box, and an outer peripheral side of the embedded nut 102 forms an annular boss 104; the annular boss 104 is arranged in two or more than two and is spaced along the central axis, and an annular groove 106 is formed between adjacent annular bosses 104. It should be noted that the annular boss 104 in the present application can be a continuous annular boss 104, or an intermittent annular boss 104, which is not limited in the present application. The outer peripheral side of the embedded nut 102 in the present application forms two or more than two annular bosses 104 arranged in space along the central axis of the embedded nut 102; an annular groove 106 is formed between adjacent annular bosses 104. When the embedded nut 102 is used, the embedded nut 102 is at least partially embedded in the base 103, and at least part of the annular boss 104 on the outer peripheral side of the embedded nut 102 abuts against the inner side of the connecting hole 107 of the base 103, and the inner side of the connecting hole 107 at least partially extends into the space of the annular groove 106. The connection stability of the embedded nut 102 can be enhanced, the embedded nut 102 can be prevented from being pulled out of the connecting hole 107, and reliable fixation of the embedded nut 102 can be achieved.

[0027] It should be noted that the base 103 of the present application can be of any structure, and its material can be plastic or other types of materials, and the purpose is to carry various electrical components. The threaded connection assembly 100 provided in the present application can reliably install electrical components including large and heavy electrical components on the base 103.

[0028] It should be noted that the at least part of the annular boss 104 on the outer circumferential side of the embedded nut 102 abuts against the inner side of the connecting hole 107 of the base 103, and the inner side of the connecting hole 107 at least partially extends into the space of the annular groove 106.

[0029] For the abutment, the embedded nut 102 can be in interference fit with the connecting hole 107, or the embedded nut 102 can be fixed by means of mold injection pre-embedding, hot pressing, cold pressing, and ultrasonic pressing, which can be selected by those skilled in the art as needed.

[0030] In addition, in the case of interference fit or hot pressing, cold pressing, and ultrasonic pressing of the embedded nut 102 and the connecting hole 107, because the inner wall of the connecting hole 107 is plastic, the inner side of the connecting hole 107 at least partially extends into the space of the annular groove 106 under stress deformation. Thus, the stability of the embedded nut 102 and the base 103 is further enhanced. If the embedded nut 102 is pre-embedded by mold injection, the space in the annular groove 106 is.

[0031] In addition, as a preferred embodiment, the embedded nut 102 in the present application can be made of metal, such as steel or copper, and of course other hard materials.

[0032] In one embodiment, the annular boss 104 is provided with a plurality of anti-skid strips 105 arranged at intervals around the central axis, to prevent the embedded nut 102 from rotating.

[0033] As a preferred embodiment, the anti-skid strips 105 provided on the embedded nut 102 of the present application are provided with a preset angle with the central axis of the threaded hole. According to the need, the extension direction of the anti-skid strips 105 can also be made consistent with the extension direction of the central axis of the threaded hole. The locking effect of the embedded nut 102 is good, and it is less likely to rotate.

[0034] Referring to Figure 4 , Figure 5 As shown in the drawings, the present application is provided with a plurality of anti-skid strips 105 arranged at intervals around the central axis of the embedded nut 102 on the annular boss 104. The setting of the anti-skid strips 105 can increase the circumferential friction between the embedded nut 102 and the inner wall of the connecting hole 107, preventing the embedded nut 102 from rotating in the connecting hole 107. The annular boss 104 of the present application has a plurality of annular bosses 104 arranged at intervals along the central axis, and the annular grooves 106 are formed between adjacent annular bosses 104.

[0035] The present application further increases the axial fitting force through the setting of the annular groove 106, realizes the stable connection of the embedded nut 102 and the base 103, and is beneficial to the reliable fixation of heavy electrical components.

[0036] Referring to Figure 4 , Figure 5 As an optional embodiment, two annular protrusions 104 are provided, and the anti-skid strips 105 provided on the first annular protrusion 104 extend in a direction intersecting with the anti-skid strips 105 provided on the second annular protrusion 104.

[0037] In the embodiment, two annular protrusions 104 are formed on the outer circumferential side wall of the embedded nut 102, and an annular groove 106 is formed between the two annular protrusions 104.

[0038] It should be noted that the anti-skid strips 105 provided on the first annular protrusion 104 are inclined to the left, and the anti-skid strips 105 provided on the second annular protrusion 104 are inclined to the right. Through the above arrangement, the rotation of the embedded nut 102 on the base 103 is effectively prevented, and the limiting of the circumferential rotation is achieved.

[0039] The embedded nut 102 is in a circular tube structure, and the central axis of the annular protrusion 104, the central axis of the circular tube structure, and the central axis of the threaded hole are consistent.

[0040] It should be noted that the embedded nut 102 can also be provided in a square tube structure according to the needs of those skilled in the art, and a threaded hole is provided at the center of the square tube structure. The corresponding connecting hole 107 provided on the base 103 needs to correspond to the square tube structure to facilitate plug-in cooperation.

[0041] Referring to Figure 1 , Figure 2 , Figure 6 and Figure 7 The embodiment provides an electric appliance box, which comprises a base 103 and a threaded connection assembly 100. The threaded connection assembly 100 comprises a screw 101 and an embedded nut 102. The embedded nut 102 is provided with a threaded hole matched with the screw 101. The outer circumferential side surface of the embedded nut 102 is formed with two or more annular protrusions 104 arranged along the central axis of the embedded nut 102. An annular groove 106 is formed between adjacent annular protrusions 104.

[0042] The base 103 is provided with a connecting hole 107, and the embedded nut 102 is at least partially embedded in the connecting hole 107. At least part of the annular protrusions 104 on the outer circumferential side surface of the embedded nut 102 abuts against the inner side surface of the connecting hole 107, and the inner side surface of the connecting hole 107 at least partially extends into the space of the annular groove 106. The base 103 is arranged with an electronic element 108, and the screw 101 is connected with the embedded nut 102 through the connecting part of the electronic element 108.

[0043] The base 103 is provided with the threaded connection assembly 100, and the embedded nut 102 of the threaded connection assembly 100 can be reliably and stably connected with the base 103, so that the various electrical elements can be stably fixed on the base 103.

[0044] It should be noted that the electrical box in the embodiment of the present application can be an electric control device, and the electronic element 108 provided on the base 103 can be a reactor or other electronic element 108 with a large weight. The embodiment of the present application does not make special limitation, and the person skilled in the art can select as needed.

[0045] The threaded connection assembly 100 is provided, so that the electrical element such as a reactor can be stably fixed in a vibrating environment, and the problem that a plastic thread is not suitable for fixing heavy objects is solved. The embedded nut 102 made of metal can be preferably used to reinforce the plastic connecting hole 107, the inclined anti-skid strip 105 is used to prevent the circumferential rotation of the embedded nut 102, and the annular boss 104 and the annular groove 106 are used to prevent the axial movement of the embedded nut 102.

[0046] Referring to Figure 6 , Figure 7 and Figure 8 As an optional embodiment, the base 103 is provided with a protruding column 109 on one side surface, and the connecting hole 107 is arranged in the protruding column 109, and the extension direction of the connecting hole 107 is consistent with the extension direction of the protruding column 109.

[0047] Further, the protruding column 109 is arranged on the surface of the base 103 away from the electronic element 108, the structure of the connecting hole 107 is extended and reinforced by the protruding column 109, and the axial length of the connecting hole 107 is increased.

[0048] The electronic element 108 is arranged on the surface of the base 103 away from the protruding column 109.

[0049] Specifically, the electronic element 108 is arranged on the first side surface of the base 103, and the protruding column 109 is arranged on the second side surface of the base 103. The protruding column 109 on the second side surface can avoid affecting the arrangement of the electronic element 108, and can make the electronic element 108 and the surface of the base 103 form a larger contact surface. The protruding column 109 and the electronic element 108 are arranged on the corresponding two surfaces of the base 103 in the embodiment of the present application, and no protruding column 109 or the like is arranged on the first side surface, so that the first side surface can form a complete plane, the electronic element 108 is arranged conveniently, and the electronic element 108 and the base 103 have a larger contact area.

[0050] Referring toFigure 3 , Figure 5 As shown, in one optional implementation, the protruding post 109 has a recessed platform 112 at one end away from the surface of the base 103, and the central axis of the recessed platform 112 coincides with the central axis of the connecting hole 107; the embedded nut 102 is provided with a flange structure 113; the embedded nut 102 is embedded in the connecting hole 107, and the flange structure 113 is inserted into the recessed platform 112; the embedded nut 102 is away from the surface of the electronic component 108.

[0051] In this embodiment, a countersunk platform 112 is provided on the end face of the protruding post 109 away from the base 103. This allows the flanged structure 113 to abut against the countersunk platform 112 when the embedded nut 102 is inserted into the connecting hole 107, forming a resisting force that prevents the embedded nut 102 from further approaching the electronic component 108. When the screw 101 is inserted into the threaded hole of the embedded nut 102 from the side of the electronic component 108, the two are threadedly connected, generating a force that brings them closer together during the turning process. In this embodiment, the force generated by the abutment between the flanged structure 113 and the countersunk platform 112 can counteract the pulling force on the embedded nut 102 generated by the engagement of the screw 101 and the embedded nut 102. This effectively prevents the axial displacement of the embedded nut 102 within the connecting hole 107 when the screw 101 is connected, thus improving its stability.

[0052] It should be noted that, in this embodiment of the application, after the flanged structure 113 is inserted into the countersunk platform 112, the surface of the embedded nut 102 facing away from the electronic component 108 is flush with the surface of the protruding post 109. This makes the installation of the embedded nut 102 more stable.

[0053] Reference Figure 8 As shown, as an optional implementation, the outer periphery of the protruding post 109 is provided with a plurality of spaced reinforcing ribs 110, which extend radially along the connecting hole 107.

[0054] More preferably, in this embodiment of the application, a plurality of reinforcing ribs 110 are provided on the outer periphery of the protruding post 109 at intervals, which greatly enhance the structural strength at the connecting hole 107.

[0055] Reference Figure 8 As shown, in one optional implementation, the protruding post 109 is provided with an outer annular sleeve 111 in the circumferential direction; one end of the reinforcing rib 110 is connected to the inner wall of the outer annular sleeve 111, and the other end is connected to the protruding post 109.

[0056] It should be noted that the number of reinforcing ribs 110 provided on the outer periphery of the protruding column 109 can be set by those skilled in the art as needed.

[0057] For example, there are four reinforcing ribs 110, which form a cross-shaped structure with the protruding column 109 as the center.

[0058] For example, the reinforcing ribs 110 are six in number and are arranged in a circumferential direction at intervals around the protruding column 109.

[0059] The embodiment of the present application can further enhance the structural strength at the connecting hole 107 by the peripheral annular sleeve 111, which is conducive to reliable connection.

[0060] Further, referring to Figure 9 As shown in the figure, the embedded nut 102 is a four-cornered nut. It should be noted that the embedded nut 102 can also be a six-cornered nut or other shapes.

[0061] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A threaded connection assembly, characterized in that, The embedded nut (102) is provided with a threaded hole matched with the screw (101); the outer circumferential side of the embedded nut (102) is formed with two or more annular bosses (104) arranged along the central axis of the embedded nut (102) at intervals; and an annular groove (106) is formed between adjacent annular bosses (104).

2. A threaded connection assembly according to claim 1, characterized in that, The annular boss (104) is provided with a plurality of anti-skid strips (105) arranged at intervals around the central axis.

3. Threaded connection assembly according to claim 1 or 2, characterized in that In any two adjacent annular bosses (104), the anti-skid strips (105) arranged on the first annular boss (104) extend in a direction intersecting the anti-skid strips (105) arranged on the second annular boss (104).

4. An electrical box, characterized by, The embedded nut (102) is provided with a threaded hole matched with the screw (101); the outer circumferential side of the embedded nut (102) is formed with two or more annular bosses (104) arranged along the central axis of the embedded nut (102) at intervals; and an annular groove (106) is formed between adjacent annular bosses (104). The base (103) is provided with a connecting hole (107), at least part of the annular boss surface on the outer circumferential side of the embedded nut (102) abuts against the inner side surface of the connecting hole (107), and the inner side surface of the connecting hole (107) at least partially extends into the space of the annular groove (106); the base (103) is arranged with an electronic element (108), and the screw (101) is connected with the embedded nut (102) through the connecting part of the electronic element (108).

5. The electrical box of Claim 4, wherein, The side surface of the base (103) is provided with a protruding column (109), the connecting hole (107) is arranged in the protruding column (109), and the extension direction of the connecting hole (107) is consistent with the extension direction of the protruding column (109).

6. The electrical box of claim 5, wherein, The outer periphery of the protruding column (109) is provided with a plurality of spaced reinforcing ribs (110) extending along the radial direction of the connecting hole (107).

7. The electrical box of Claim 6, wherein, The protruding column (109) is circumferentially provided with an outer peripheral annular sleeve (111); one end of the reinforcing rib (110) is connected with the inner wall of the outer peripheral annular sleeve (111), and the other end is connected with the protruding column (109).

8. The electrical box of Claim 6, wherein, The reinforcing rib (110) has four, and is arranged with the protruding column (109) as the center, and from the axial direction of the protruding column (109), the four reinforcing ribs (110) are arranged in a cross structure.

9. The electrical box of Claim 5, wherein, The convex column (109) is provided with a sunken platform (112) at one end away from the surface of the base (103), the central axis of the sunken platform (112) coincides with the central axis of the connecting hole (107); the embedded nut (102) is provided with a flange structure (113); at least part of the annular convex surface on the outer circumferential side of the embedded nut (102) abuts against the inner side of the connecting hole (107), and the inner side of the connecting hole (107) at least partially extends into the annular groove space, and the flange structure (113) is inserted into the sunken platform (112).

10. The electrical device box of claim 5, wherein, The electronic element (108) is mounted on the surface of the base (103) away from the convex column (109).

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