Distribution box convenient to install

Abstract

The utility model relates to the technical field of power distribution boxes, in particular to a power distribution box convenient to install, which comprises a box body and an installation plate combination, the box body is provided with a knife switch cavity, the installation plate combination is located in the knife switch cavity, and the installation plate combination comprises a first installation plate, a second installation plate and a third installation plate and is provided with a strip-shaped groove in the length direction. The first mounting plate is provided with a knife switch, the second mounting plate is provided with a metering transformer, the third mounting plate is provided with an N-phase copper bar, the first mounting plate and the second mounting plate are both provided with first through holes, the third mounting plate is provided with second through holes, and the two side walls of the knife switch cavity are both provided with U-shaped power strips provided with third through holes. Two ends of the first mounting plate and two ends of the second mounting plate are respectively connected with the two U-shaped power strips, one end of the third mounting plate is connected with one U-shaped power strip, the plurality of third through holes are arranged on the U-shaped power strips, and the strip-shaped grooves are arranged on the first mounting plate, the second mounting plate and the third mounting plate, so that the advantages of better universality and convenience in mounting are realized.

Description

Technical Field

[0001] This application relates to the field of distribution box technology, and more specifically to a distribution box that is easy to install. Background Technology

[0002] A distribution box is a container that assembles switching equipment, measuring instruments, protective electrical appliances and auxiliary equipment inside according to electrical wiring requirements.

[0003] There is a type of distribution box, such as Figure 1 As shown, the device includes a knife switch cavity 90, a first mounting plate 91, a second mounting plate 92, and a third mounting plate 93. The two side walls of the knife switch cavity 90 have two protrusions 901, each of which has multiple through holes (not shown in the figure). The first mounting plate 91 and the second mounting plate 92 are mounted on the two protrusions 901 by bolts and nuts. The second mounting plate 92 is located between the first mounting plate 91 and the third mounting plate 93. The first mounting plate 91 is used to mount the knife switch, and the second mounting plate 93... The first mounting plate 91, the second mounting plate 92, the third mounting plate 93, and the protrusion 901 have only one set of holes that must be used during installation. Therefore, the height and left-right positions of the knife switch installed on the first mounting plate 91, the height and left-right positions of the metering transformer on the second mounting plate 92, and the left-right and height positions of the N-phase copper busbar are not adjustable, resulting in poor versatility and difficulty in installation.

[0004] Therefore, there is a need for a more versatile and easier-to-install distribution box with a quick-installation structure on the second mounting plate. Summary of the Invention

[0005] The main objective of this application is to provide an easy-to-install distribution box, comprising a box body with a switch cavity. The easy-to-install distribution box further includes a mounting plate assembly located within the switch cavity. The mounting plate assembly includes a first mounting plate, a second mounting plate, and a third mounting plate, with the second mounting plate positioned between the first and third mounting plates. Each of the first, second, and third mounting plates has several strip-shaped grooves along its length. The first mounting plate is equipped with a knife switch, the second mounting plate with a metering transformer, and the third mounting plate with an N-phase copper busbar. Both ends of the first and second mounting plates have several first through holes, and one end of the third mounting plate has a second through hole. The switch cavity has a vertically arranged U-shaped plug on each of its two side walls. Several third through holes are spaced apart on the U-shaped plug. The first mounting plate and the second mounting plate are connected at both ends to two of the U-shaped plugs, with the first through hole directly opposite the corresponding third through hole. One end of the third mounting plate is connected to one of the U-shaped plugs, with the second through hole directly opposite the corresponding third through hole. By providing multiple third through holes on the U-shaped plug and by providing strip grooves on the first, second, and third mounting plates, the first, second, and third mounting plates can be selectively installed in the height direction. The strip grooves allow for adjustment of the left and right positions of the knife switch, metering transformer, and N-phase copper busbar. Compared to existing technologies, this design offers advantages in versatility and ease of installation.

[0006] Another objective of this application is to provide an easy-to-install distribution box, wherein the easy-to-install distribution box further includes several quick-installation structures, and the two ends of the second mounting plate are connected to the two U-shaped plugs through the quick-installation structures, thereby realizing the advantage of the second mounting plate having quick-installation structures.

[0007] To achieve at least one of the above-mentioned objectives, this application provides an easily installable distribution box, comprising a housing having a switch cavity, wherein the easily installable distribution box includes:

[0008] A mounting plate assembly is located within the switch cavity. The mounting plate assembly includes a first mounting plate, a second mounting plate, and a third mounting plate. The second mounting plate is located between the first and third mounting plates. Each of the first, second, and third mounting plates has several strip-shaped grooves along its length. The first mounting plate is equipped with a knife switch, the second mounting plate is equipped with a metering transformer, and the third mounting plate is equipped with an N-phase copper busbar. Both ends of the first and second mounting plates have several first through holes, and one end of the third mounting plate has a second through hole. Both side walls of the switch cavity have vertically arranged U-shaped plugs with several third through holes spaced apart. The two ends of the first and second mounting plates are respectively connected to two U-shaped plugs, with the first through holes directly opposite the corresponding third through holes. One end of the third mounting plate is connected to one of the U-shaped plugs, with the second through hole directly opposite the corresponding third through hole.

[0009] In one or more embodiments of this application, the easy-to-install distribution box further includes an A-phase copper busbar, a B-phase copper busbar, and a C-phase copper busbar. One end of each of the A-phase, B-phase, and C-phase copper busbars is connected to the knife switch. The A-phase, B-phase, and C-phase copper busbars are located on the back side of the second mounting plate, and the N-phase copper busbar is located on the side of the C-phase copper busbar away from the second mounting plate.

[0010] In one or more embodiments of this application, the easy-to-install distribution box further includes several quick-installation structures, and the two ends of the second mounting plate are connected to the two U-shaped plugs through the quick-installation structures.

[0011] In one or more embodiments of this application, each of the quick-installation structures includes an upper support, a lower support, and a plug. The upper support and the lower support are disposed opposite to each other, and the upper support is flexibly mounted on the lower support. Each of the upper support and the lower support has a groove at one of its facing ends. The sidewalls of the upper support and the lower support have multiple flanges. When the upper support and the lower support successively pass through the first through hole on the second mounting plate and the third through hole on the U-shaped plug, and the flanges are coplanar with the sidewalls of the U-shaped plug, the plug is inserted into the grooves of the upper support and the lower support.

[0012] In one or more embodiments of this application, each of the quick-release structures further includes an elastic member. The upper support member and the lower support member each have a receiving groove at the end opposite to the groove. The two ends of the elastic member are respectively connected to the bottom wall of the receiving groove on the upper support member and the lower support member. When the elastic member is in an undeformed state, the distance between the upper support member and the lower support member is greater than the sum of the thicknesses of the protruding portion of the flange on the upper support member and the protruding portion of the flange on the lower support member.

[0013] In one or more embodiments of this application, the upper support member has two guide holes at one end of the receiving groove, and the lower support member has two extension ends at one end of the receiving groove, the two extension ends being slidably inserted into the two guide holes.

[0014] In one or more embodiments of this application, the radial dimension of the lower support member is smaller than the radial dimension of the upper support member, and the radius of the portion of the upper support member excluding the flange is equal to the radius of the first through hole and the third through hole.

[0015] In one or more embodiments of this application, the lower support has a contact surface, a transition surface and a reduced diameter surface, and the distances between the contact surface, the transition surface and the reduced diameter surface and the central axis of the lower support decrease sequentially. When the plug is inserted into the groove, the contact surface abuts against the walls of the first through hole and the third through hole.

[0016] In this embodiment, the easy-to-install distribution box includes a box body and a mounting plate assembly. The box body has a knife switch cavity, and the mounting plate assembly is located inside the knife switch cavity. The mounting plate assembly includes a first mounting plate, a second mounting plate, and a third mounting plate, each having a strip-shaped groove along its length. The first mounting plate is equipped with a knife switch, the second mounting plate is equipped with a metering transformer, and the third mounting plate is equipped with an N-phase copper busbar. Both ends of the first and second mounting plates have first through holes, and one end of the third mounting plate has a second through hole. Both side walls of the knife switch cavity have a... A U-shaped power strip with a third through hole has two U-shaped power strips connected at both ends of a first mounting plate and a second mounting plate, and one end of a third mounting plate connected to a U-shaped power strip. By setting multiple third through holes on the U-shaped power strip and by setting strip grooves on the first, second, and third mounting plates, the first, second, and third mounting plates can be selectively installed in the height direction. The strip grooves enable adjustment of the left and right positions of the knife switch, metering transformer, and N-phase copper busbar. Compared with existing technologies, it has the advantages of better versatility and easier installation. Attached Figure Description

[0017] These and / or other aspects and advantages of this application will become clearer and more readily understood from the following detailed description of embodiments of this application taken in conjunction with the accompanying drawings, wherein:

[0018] Figure 1 The diagram illustrates the structure of a conventional distribution box.

[0019] Figure 2 The illustration shows a structural schematic diagram of a distribution box that is easy to install according to this application;

[0020] Figure 3 The diagram illustrates the structure of a U-shaped power strip;

[0021] Figure 4 The diagram illustrates the structure of the quick-release mechanism inserted into the first and third through holes.

[0022] Figure 5 The diagram illustrates the quick-assembly structure located at... Figure 4 Sectional view at EE-;

[0023] Figure 6 The diagram illustrates the quick-assembly structure located at... Figure 4 A sectional view at FF-;

[0024] Figure 7 The diagram shows a schematic of the quick-assembly structure at a certain angle. Detailed Implementation

[0025] The terms and words used in the following specification and claims are not limited to their literal meaning, but are used solely by the inventors to enable a clear and consistent understanding of this application. Therefore, it will be apparent to those skilled in the art that the following description of various embodiments of this application is provided for illustrative purposes only and not for the purpose of limiting the application as defined in the appended claims and their equivalents.

[0026] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0027] While ordinal numbers such as "first," "second," etc., will be used to describe various components, there is no limitation on which components are used herein. The term is used only to distinguish one component from another. For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component, without departing from the teachings of the utility model concept. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] The terminology used herein is for the purpose of describing various embodiments only and is not intended to be limiting. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. It will also be understood that the terms “comprising” and / or “having” as used in this specification specify the presence of the described features, numbers, steps, operations, components, elements or combinations thereof, without excluding the presence or addition of one or more other features, numbers, steps, operations, components, elements or groups thereof.

[0029] A schematic diagram of an easy-to-install electrical distribution box, for reference. Figures 2 to 7 According to a preferred embodiment of the present invention, an easy-to-install distribution box includes a box body 10 and a mounting plate assembly 20.

[0030] Specifically, such as Figure 2 As shown, the housing 10 has a knife switch cavity 101, and the mounting plate assembly 20 is located within the knife switch cavity 101. The mounting plate assembly 20 includes a first mounting plate 201, a second mounting plate 202, and a third mounting plate 203. The second mounting plate 202 is located between the first mounting plate 201 and the third mounting plate 203. Each of the first mounting plate 201, the second mounting plate 202, and the third mounting plate 203 has several strip-shaped grooves 2011 along its length. The first mounting plate 201 is equipped with a knife switch 80, the second mounting plate 202 is equipped with a metering transformer (not shown in the figure), and the third mounting plate 203 is equipped with an N-phase copper busbar 81. Both ends of the first mounting plate 201 and the second mounting plate 202 have several first through holes 2012, and one end of the third mounting plate 203 has a second through hole 2031. (Refer to...) Figure 2 and Figure 3 The two side walls of the gate cavity 101 each have a vertically arranged U-shaped plug bar 1011. The U-shaped plug bar 1011 has a plurality of third through holes 1012 arranged at intervals. The two ends of the first mounting plate 201 and the second mounting plate 202 are respectively connected to the two U-shaped plug bars 1011, and the first through hole 2012 is directly opposite the corresponding third through hole 1012. One end of the third mounting plate 203 is connected to one of the U-shaped plug bars 1011, and the second through hole 2031 is directly opposite the corresponding third through hole 1012.

[0031] It should be noted that by providing multiple third through holes 1012 on the U-shaped power strip 1011, when it is necessary to install the knife switch 80 and the metering transformer, if it is necessary to adjust the height position of the knife switch 80 and the metering transformer, the height positions of the first mounting plate 201 and the second mounting plate 202 can be moved, and the first through holes 2012 on the first mounting plate 201 and the second mounting plate 202 can be aligned with the third through holes 1012 at the corresponding heights. This allows the first mounting plate 201 and the second mounting plate 202 to be selectively installed on the U-shaped power strip 1011 in the height direction. Similarly, when installing the N-phase copper busbar 81, if it is necessary to adjust the height position of the N-phase copper busbar 81, the assembler can adjust the height position of the third mounting plate 203, and the third through holes 1012 on the third mounting plate 203 can be aligned with the third through holes 1012 at the corresponding heights. The third through hole 1012 is directly opposite to a third through hole 1012 on the U-shaped plug 1011, allowing the third mounting plate 203 to be selectively mounted on the U-shaped plug 1011 in the height direction. When it is necessary to adjust the left and right positions of the knife switch 80, the metering transformer, and the N-phase copper busbar 81, the corresponding mounting bolts can be moved within the strip groove 2011, and then tightened after being moved to the designated position. This fixes the knife switch 80, the metering transformer, and the N-phase copper busbar 81 on the corresponding first mounting plate 201, second mounting plate 202, and third mounting plate 203. Compared with the prior art where the first mounting plate 201, second mounting plate 202, and third mounting plate 203 only have one set of mounting holes for installation, this application has the advantages of better versatility and ease of installation.

[0032] Furthermore, in the embodiments of this application, such as Figure 2 As shown, the easy-to-install distribution box also includes an A-phase copper busbar 82, a B-phase copper busbar 83, and a C-phase copper busbar 84. One end of each of the A-phase copper busbar 82, the B-phase copper busbar 83, and the C-phase copper busbar 84 is connected to the knife switch 80. The A-phase copper busbar 82, the B-phase copper busbar 83, and the C-phase copper busbar 84 are located on the back of the second mounting plate 202, and the N-phase copper busbar 81 is located on the side of the C-phase copper busbar 84 away from the second mounting plate 202.

[0033] It should be noted that, since the A-phase copper busbar 82, the B-phase copper busbar 83, and the C-phase copper busbar 84 are all located on the back of the second mounting plate 202, to avoid interference with the second mounting plate 202 during the connection of the A-phase copper busbar 82, B-phase copper busbar 83, and C-phase copper busbar 84 to the knife switch 80, in actual installation, the second mounting plate 202 is installed on the U-shaped plug 1011 after the A-phase copper busbar 82, B-phase copper busbar 83, and C-phase copper busbar 84 are installed. This also means that if the A-phase copper busbar 82, B-phase copper busbar 83, and C-phase copper busbar 84 need to be replaced or adjusted during later maintenance, the second mounting plate 202 located on the outside needs to be removed first. Currently, when disassembling or assembling the second mounting plate 202, the bolts on the second mounting plate 202 are loosened or tightened. Since the second mounting plate 202 usually has two bolts at both ends, it is inconvenient to tighten the bolts one by one in the mass production and assembly process. In addition, when disassembling, tools are needed to loosen the bolts.

[0034] Therefore, in the embodiments of this application, such as Figure 2 As shown, the easy-to-install distribution box also includes several quick-installation structures 30, and the two ends of the second mounting plate 202 are connected to the two U-shaped plugs 1011 through the quick-installation structures 30.

[0035] It should be noted that by setting the quick-installation structure 30, the installation of the second mounting plate 202 is more efficient and can be carried out without the aid of tools.

[0036] Specifically, such as Figures 4 to 5 As shown, each of the quick-installation structures 30 includes an upper support 301, a lower support 302, and a plug 303. The upper support 301 and the lower support 302 are arranged opposite to each other, and the upper support 301 is raised and lowered on the lower support 302. Each of the upper support 301 and the lower support 302 has a groove 3011 at one end facing each other. The sidewalls of the upper support 301 and the lower support 302 have multiple flanges 3012. When the upper support 301 and the lower support 302 successively pass through the first through hole 2012 on the second mounting plate 202 and the third through hole 1012 on the U-shaped plug 1011, and the flanges 3012 are coplanar with the sidewalls of the U-shaped plug 1011, the plug 303 is inserted into the grooves 3011 of the upper support 301 and the lower support 302.

[0037] It should be noted that after aligning the first through hole 2012 on the second mounting plate 202 with the third through hole 1012 on the U-shaped power strip 1011, the operator can insert the upper support 301 and the lower support 302 into the corresponding first through hole 2012 and third through hole 1012. It should be added that the upper support 301 and the lower support 302 are normally connected to each other, and by pressing the upper support 301 and the lower support 302 against each other, the upper support 301... The upper support 301 and the lower support 302 can move towards each other, and the overall radial dimension of the upper support 301 and the lower support 302 is less than or equal to the radial dimension of the first through hole 2012 and the third through hole 1012. When the upper support 301 and the lower support 302 are fully inserted, it should be noted that the sidewalls of the upper support 301 and the lower support 302 have four flanges 3012, of which two flanges 3012 are located at both ends of the upper support 301 or the lower support 302, and the other two are... The flange 3012 is spaced a predetermined distance from the end of the upper abutment 301 or the lower abutment 302. At this point, one flange 3012 abuts against the second mounting plate 202. Then, the operator releases the upper abutment 301 and the lower abutment 302, causing them to move in opposite directions and bringing the remaining flanges 3012 into contact with the sidewall of the U-shaped plug 1011. Subsequently, the operator only needs to insert the plug 303 into the upper abutment 301 and the lower abutment 302. Within the groove 3011 of component 302, the opposite sidewalls of the upper support component 301 and the lower support component 302 abut against the walls of the first through hole 2012 and the third through hole 1012. Since the axial movement of the quick-install structure 30 is restricted by the flange 3012, the position of the quick-install structure 30 is fixed, thereby realizing the fixed installation of the second mounting plate 202 on the U-shaped plug 1011. Compared with the prior art, it has the advantage of the second mounting plate with quick-install structure.

[0038] Furthermore, to achieve the normal connection between the upper support 301 and the lower support 302, and to ensure that the upper support 301 and the lower support 302 can move in opposite directions when the assembly personnel no longer press on them, such as... Figure 5 and Figure 6As shown, each of the quick-release structures 30 further includes an elastic element 304. The upper abutment 301 and the lower abutment 302 each have a receiving groove 3013 at the end opposite to the groove 3011. The two ends of the elastic element 304 are respectively connected to the bottom wall of the receiving groove 3013 on the upper abutment 301 and the lower abutment 302. When the elastic element 304 is in an undeformed state, the distance between the upper abutment 301 and the lower abutment 302 is greater than the sum of the thicknesses of the protruding portion of the flange 3012 on the upper abutment 301 and the protruding portion of the flange 3012 on the lower abutment 302. This allows the upper abutment 301 and the lower abutment 302 with the flange 3012 to extend into the third through hole 1012 and the first through hole 2012 when the upper abutment 301 and the lower abutment 302 move towards each other and abut against each other.

[0039] Furthermore, to guide the relative movement of the upper abutment 301 and the lower abutment 302, such as... Figure 5 and Figure 6 As shown, the upper support member 301 has two guide holes 3014 at one end of the receiving groove 3013, and the lower support member 302 has two extension ends 3021 at one end of the receiving groove 3013. The two extension ends 3021 are slidably inserted into the two guide holes 3014, and the receiving groove 3013 is located between the two guide holes 3014.

[0040] Furthermore, in the embodiments of this application, reference is made to Figure 6 The radial dimension of the lower support member 302 is smaller than the radial dimension of the upper support member 301, referring to... Figure 4 The radius of the upper abutment 301, excluding the flange 3012, is equal to the radius of the first through hole 2012 and the third through hole 1012.

[0041] Specifically, such as Figure 6 As shown, the lower abutment 302 has abutment surface 3022, transition surface 3023, and reduced diameter surface 3024. The distances from the abutment surface 3022, the transition surface 3023, and the reduced diameter surface 3024 to the central axis of the lower abutment 302 decrease sequentially. When the plug 303 is inserted into the groove 3011, the abutment surface 3022 abuts against the walls of the first through hole 2012 and the third through hole 1012. It should be noted that by providing the abutment surface 3022, the contact area between the lower abutment 302 and the walls of the first through hole 2012 and the third through hole 1012 during abutment is increased.

[0042] In addition, such as Figure 4 and Figure 7As shown, one end of the plug 303 has a gripping end 3031, so that when the second mounting plate 202 is removed, the operator can pull out the plug 303 by gripping the gripping end, and then press the upper support 301 and the lower support 302 to remove it from the third through hole 1012.

[0043] In summary, the easy-to-install distribution box described in the embodiments of this application is explained, which provides advantages such as better versatility, ease of installation, and a quick-installation structure on the second mounting plate.

[0044] It is worth mentioning that, in the embodiments of this application, the easy-to-install distribution box has a simple structure, does not involve complex manufacturing processes or expensive materials, and is highly economical. At the same time, for manufacturers, the easy-to-install distribution box provided in this application is easy to produce and inexpensive, which is more conducive to controlling production costs and further facilitates product promotion and use.

[0045] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The function and structural principle of the present invention have been shown and explained in the embodiments, and any modifications or variations may be made to the implementation of the present invention without departing from these principles.

Claims

1. An easy-to-install distribution box, comprising a housing, the housing having a switch cavity, characterized in that: The easy-to-install distribution box also includes A mounting plate assembly is located within the switch cavity. The mounting plate assembly includes a first mounting plate, a second mounting plate, and a third mounting plate. The second mounting plate is located between the first and third mounting plates. Each of the first, second, and third mounting plates has several strip-shaped grooves along its length. The first mounting plate is equipped with a knife switch, the second mounting plate is equipped with a metering transformer, and the third mounting plate is equipped with an N-phase copper busbar. Both ends of the first and second mounting plates have several first through holes, and one end of the third mounting plate has a second through hole. Both side walls of the switch cavity have vertically arranged U-shaped plugs with several third through holes spaced apart. The two ends of the first and second mounting plates are respectively connected to two U-shaped plugs, with the first through holes directly opposite the corresponding third through holes. One end of the third mounting plate is connected to one of the U-shaped plugs, with the second through hole directly opposite the corresponding third through hole.

2. The easily installable distribution box according to claim 1, characterized in that: The easy-to-install distribution box also includes an A-phase copper busbar, a B-phase copper busbar, and a C-phase copper busbar. One end of each of the A-phase, B-phase, and C-phase copper busbars is connected to the knife switch. The A-phase, B-phase, and C-phase copper busbars are located on the back of the second mounting plate, and the N-phase copper busbar is located on the side of the C-phase copper busbar away from the second mounting plate.

3. The easily installable distribution box according to claim 2, characterized in that: The easy-to-install distribution box also includes several quick-installation structures, and the two ends of the second mounting plate are connected to the two U-shaped plugs through the quick-installation structures.

4. The easily installable distribution box according to claim 3, characterized in that: Each of the aforementioned quick-installation structures includes an upper support, a lower support, and a plug. The upper support and the lower support are arranged opposite to each other, and the upper support is lifted and lowered on the lower support. Each of the upper support and the lower support has a groove at one of their facing ends. The sidewalls of the upper support and the lower support have multiple flanges. When the upper support and the lower support successively pass through the first through hole on the second mounting plate and the third through hole on the U-shaped plug, and the flanges are coplanar with the sidewalls of the U-shaped plug, the plug is inserted into the grooves of the upper support and the lower support.

5. The easily installable distribution box according to claim 4, characterized in that: Each of the quick-release structures further includes an elastic element. The upper and lower support members each have a receiving groove at the end opposite to the groove. The two ends of the elastic element are respectively connected to the bottom wall of the receiving groove on the upper and lower support members. When the elastic element is in an undeformed state, the distance between the upper and lower support members is greater than the sum of the thicknesses of the protruding portion of the flange on the upper support member and the protruding portion of the flange on the lower support member.

6. The easily installable distribution box according to claim 5, characterized in that: The upper support member has two guide holes at one end of the receiving groove, and the lower support member has two extension ends at one end of the receiving groove, with the two extension ends slidably inserted into the two guide holes.

7. The easily installable distribution box according to claim 6, characterized in that: The radial dimension of the lower support member is smaller than that of the upper support member, and the radius of the portion of the upper support member excluding the flange is equal to the radius of the first through hole and the third through hole.

8. The easily installable distribution box according to claim 7, characterized in that: The lower support has a contact surface, a transition surface and a reduced diameter surface. The distances between the contact surface, the transition surface and the reduced diameter surface and the central axis of the lower support decrease sequentially. When the plug is inserted into the groove, the contact surface abuts against the walls of the first through hole and the third through hole.

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