Functional loop junction box and vehicle

Abstract

The utility model provides a functional loop junction box and a vehicle, the functional loop junction box comprises a main box and at least one auxiliary box, the main box and each auxiliary box are respectively used for communicating a functional loop and providing overload protection for the functional loop; the main box is provided with connecting lugs used for being connected with a vehicle body, a first clamping structure is arranged on the side wall and / or the top wall of the main box, and a second clamping structure and a third clamping structure are arranged on the two opposite wall faces of the auxiliary box respectively. The first clamping structure and the second clamping structure are suitable for being in clamping fit with the third clamping structure. According to the functional loop junction box provided by the utility model, not only can the adaptability of the junction box and vehicle type configuration be improved, but also the space and the cost are saved; the auxiliary boxes and the main box are connected into a whole through the clamping structures in a vertical stacking or transverse arrangement mode, the installation space can be conveniently and reasonably planned, and the convenience, flexibility and compactness of whole vehicle wire harness layout are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle circuit connection, and particularly relates to a functional circuit distribution box and a vehicle. Background Art

[0002] With the rapid development of new energy vehicles, the functional requirements of the whole vehicle are becoming more and more rich and diverse. Therefore, the functional circuits of the whole vehicle increase. When designing the whole vehicle wiring harness, affected by the wiring harness segmentation and power distribution, some high-current functional circuits need to be connected using a distribution box.

[0003] Currently, both high and low configuration models uniformly adopt an integral distribution box that can meet the requirements of multiple functional circuits. In this way, since the low configuration models have fewer functional circuits, the distribution box circuits of the low configuration models will be redundant, which will not only cause waste of space, but also be unfavorable for cost control of the low configuration models. Summary of the Utility Model

[0004] An embodiment of the utility model provides a functional circuit distribution box, aiming to improve the adaptability of the distribution box to vehicle configurations and save space and cost.

[0005] To achieve the above object, the technical solution adopted by the utility model is: In the first aspect, a functional circuit distribution box is provided, which includes a main box and at least one sub-box. The main box and each sub-box are respectively used to connect a functional circuit and provide overload protection for the functional circuit; the main box has a connecting ear for connecting to the vehicle body, and a first clamping structure is provided on the side wall and / or top wall of the main box. Second clamping structures and third clamping structures are respectively provided on two opposite wall surfaces of the sub-box; wherein, both the first clamping structure and the second clamping structure are adapted to form a clamping fit with the third clamping structure.

[0006] In combination with the first aspect, in a possible implementation manner, both the main box and the sub-box include a box body and a box cover; a connecting ear is provided on the box body of the main box; the first clamping structure is provided on the box cover or the side wall of the box body of the main box, the second clamping structure is provided on the box cover or the side wall of the box body of the sub-box, and the third clamping structure is provided on the bottom wall or the side wall of the box body of the sub-box.

[0007] In some embodiments, a horizontal slot is provided on the upper surface of the box cover, and a limiting rib is provided in the horizontal slot. The horizontal slot and the limiting rib together form the first clamping structure or the second clamping structure; the third clamping structure includes an insertion part and a retaining rib provided on the bottom wall of the box body of the sub-box. Wherein, the insertion part is adapted to be inserted into the horizontal slot in a plug-in fit, and the retaining rib is used to form a clamping fit with the limiting rib when the insertion part is inserted in place.

[0008] Exemplarily, the upper surface of the box cover is provided with a groove, and horizontal slots are respectively provided on the two side walls of the groove. The horizontal slots extend from one end of the groove to the other end and form a limiting surface at the extending end. The anti-retreat rib is arranged at the bottom of the groove. Among them, when the insertion part is inserted into the horizontal slot and abuts against the limiting surface, the anti-back-off rib is clamped with the anti-retreat rib.

[0009] For example, the insertion part includes a boss protruding from the lower surface of the box body and clamping edges protruding from both sides of the boss. Among them, the boss is adapted to be inserted into the groove, and the lower surface of the boss is provided with an anti-back-off rib, and the clamping edges are in plug-in fit with the horizontal slots.

[0010] In a possible implementation manner, both the anti-retreat rib and the anti-back-off rib are wedge-shaped ribs. The wedge-shaped rib includes a guiding inclined surface and a clamping vertical surface. Among them, when the insertion part abuts against the limiting surface, the clamping vertical surfaces of the anti-back-off rib and the anti-retreat rib form a clamping fit.

[0011] In some embodiments, at least two first clamping structures are horizontally and spacedly distributed on the side wall of the box body of the main box. At least two second clamping structures and at least two third clamping structures are respectively and correspondingly arranged on the two opposite side walls of the box body of the sub-box. Among them, both the first clamping structure and the second clamping structure are adapted to be clamped with the third clamping structure in the vertical direction.

[0012] Exemplarily, one end of the box body is provided with a hinge ear, and the other end is provided with a buckle. One end of the box cover is rotatably connected to the hinge ear, and the other end is provided with a snap ring, and the snap ring is in snap-fit with the buckle.

[0013] For example, the main box and each sub-box are both provided with a first power connection terminal and a second power connection terminal extending out of their respective two ends, and fuses are arranged in both the main box and the sub-box, and the fuses are used to connect and conduct the first power connection terminal and the second power connection terminal.

[0014] The beneficial effects of the functional circuit wiring box provided by the present invention are as follows: Compared with the prior art, the functional circuit wiring box of the present invention adopts a modular assembly method of a main box and at least one sub-box, and can adaptively increase or decrease the number of sub-boxes according to the required number of large-current functional circuits of the vehicle, thereby avoiding circuit redundancy in the wiring box. It can not only improve the adaptability of the wiring box to vehicle type configurations, but also save space and cost. In addition, each sub-box and the main box can be connected into one body in a vertically stacked and sequentially clamped manner, or horizontally arranged and sequentially clamped into a row, so as to facilitate and reasonably plan the installation space, and improve the convenience, flexibility and compactness of the vehicle wiring harness layout.

[0015] In a second aspect, an embodiment of the present invention further provides a vehicle, including the above-mentioned functional circuit wiring box.

[0016] The beneficial effects of the vehicle provided by the present utility model are as follows: Compared with the prior art, the vehicle of the present utility model adopts the above-mentioned functional circuit distribution box, and forms a modular assembly method through the main box and at least one sub-box, which can adaptively increase or decrease the number of sub-boxes according to the required quantity of the large-current functional circuit of the vehicle, thereby avoiding circuit redundancy in the distribution box, not only improving the adaptability of the distribution box to vehicle models, but also saving space and cost; In addition, each sub-box and the main box can be connected into one body in a vertical stacking and clamping manner in sequence, or arranged horizontally and clamped in a row in sequence, so as to conveniently and reasonably plan the installation space and improve the convenience, flexibility and compactness of the overall vehicle wiring harness layout. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. is a perspective structural view of the functional circuit distribution box provided by an embodiment of the present utility model;

[0018] Figure 2 FIG. is a perspective structural view of the main box adopted by an embodiment of the present utility model;

[0019] Figure 3 FIG. is a perspective structural view of the sub-box adopted by an embodiment of the present utility model;

[0020] Figure 4 is Figure 2 a partial enlarged structural view of part A in

[0021] Figure 5 FIG. is a perspective structural view of the sub-box when the box cover is opened in an embodiment of the present utility model;

[0022] Figure 6 FIG. is a sectional structural view of the cooperation of the first clamping structure or the second clamping structure and the third clamping structure in an embodiment of the present utility model;

[0023] Figure 7 FIG. is a top view structural view of the functional circuit distribution box provided by another embodiment of the present utility model;

[0024] Figure 8 FIG. is a perspective structural view of the sub-box (excluding the box cover) adopted by another embodiment of the present utility model.

[0025] In the figure: 10, main box; 101, connecting ear; 102, first clamping structure; 11, box body; 111, hinge ear; 112, buckle; 12, box cover; 121, horizontal slot; 1211, limiting surface; 122, limiting clamping rib; 1221, guiding inclined surface; 1222, vertical clamping surface; 123, groove; 124, attaching plate; 125, snap ring; 13, first power connection terminal; 14, second power connection terminal; 15, fuse; 20, sub-box; 21, second clamping structure; 22, third clamping structure; 221, insertion part; 2211, boss; 2212, clamping edge; 2213, avoidance groove; 222, anti-retreat clamping rib. Detailed implementation manners

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0027] It should be noted that when an element is referred to as being "disposed on" or "connected to" another element, it can be directly on the other element or indirectly on the other element. It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application 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 thus cannot be understood as a limitation to the present application. The terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0028] Please refer to Figures 1 to 8 , and now the functional circuit wiring box provided by the present utility model will be described. The functional circuit wiring box includes a main box 10 and at least one sub-box 20. The main box 10 and each sub-box 20 are respectively used to connect a functional circuit and provide overload protection for the functional circuit; the main box 10 has a connecting ear 101 for connecting to the vehicle body, and a first clamping structure 102 is provided on the side wall and / or top wall of the main box 10. Second clamping structures 21 and third clamping structures 22 are respectively provided on two opposite wall surfaces of the sub-box 20; wherein, both the first clamping structure 102 and the second clamping structure 21 are adapted to form a clamping fit with the third clamping structure 22.

[0029] It should be noted that in this embodiment, both the main box 10 and the auxiliary boxes 20 are openable single-chamber insulating boxes. The main box 10 and each auxiliary box 20 are respectively used to connect and conduct two sections of circuits on one functional loop and provide overload protection for the functional loop through the built-in overload protection elements such as fuses 15 therein. That is to say, both the main box 10 and the auxiliary boxes 20 have two power connection terminals, one for input and one for output, and the two power connection terminals are connected and conducted through the fuse 15.

[0030] In this embodiment, connection lugs 101 can be provided on the main box 10 at positions that can avoid the first clamping structure 102. Specifically, if the first clamping structure 102 is located on the top wall of the main box 10, one connection lug 101 can be provided on each of the two opposite side walls of the main box 10 and fixedly connected to the vehicle body through fasteners such as bolts. If the first clamping structure 102 is located on the side wall of the main box 10, connection lugs 101 can be provided at both ends of the main box 10 and on the side wall opposite to the first clamping structure 102, and the connection lugs 101 are used to fixedly connect to the vehicle body through fasteners such as bolts, thereby preventing the connection lugs 101 from interfering with the clamping cooperation between the first clamping structure 102 and the third clamping structure 22 of the auxiliary box 20.

[0031] It should be understood that in this embodiment, the connection between the functional loop distribution box and the vehicle body completely depends on the connection between the main box 10 and the vehicle body, and there is no need for a direct connection between the auxiliary box 20 and the vehicle body, which can facilitate the disassembly, installation, addition, and reduction of the number of auxiliary boxes 20.

[0032] The actual structures of both the first clamping structure 102 and the second clamping structure 21 are the same, and both are used for mating clamping with the third clamping structure 22. Specifically, when the first clamping structure 102 is located on the top wall of the main box 10, the second clamping structure 21 is located on the top wall of the auxiliary box 20, and the third clamping structure 22 is located on the bottom wall of the auxiliary box 20, multiple auxiliary boxes 20 can be sequentially stacked and fixed above the main box 10 through the clamping cooperation between the third clamping structure 22 and the first clamping structure 102 and the clamping cooperation between the third clamping structure 22 and the second clamping structure 21, as Figure 1 shown.

[0033] If the first clamping structure 102 is located on the side wall of the main box 10, and the second clamping structure 21 and the third clamping structure 22 are respectively located on two opposite side walls of the auxiliary box 20, multiple auxiliary boxes 20 can be sequentially connected in a row on the side of the main box 10 through the clamping cooperation between the third clamping structure 22 and the first clamping structure 102 and the clamping cooperation between the third clamping structure 22 and the second clamping structure 21, as Figure 7As shown in the figure. On this basis, the first clamping structures 102 can be provided on two opposite side walls of the main box 10, so that a plurality of sub-boxes 20 can be distributed on both sides of the main box 10 through the clamping cooperation between the third clamping structure 22 and the first clamping structure 102, thereby improving the overall structural stability.

[0034] Compared with the prior art, the functional circuit wiring box provided in this embodiment adopts a modular assembly method with the main box 10 and at least one sub-box 20, and can adaptively increase or decrease the number of sub-boxes 20 according to the required quantity of the vehicle's high-current functional circuit, thereby avoiding circuit redundancy in the wiring box. It can not only improve the adaptability of the wiring box to vehicle models, but also save space and cost; in addition, each sub-box 20 and the main box 10 can be connected into one body in a vertically stacked and sequentially clamped manner, or horizontally arranged and sequentially clamped into a row, so as to facilitate and reasonably plan the installation space and improve the convenience, flexibility and compactness of the vehicle wiring harness layout.

[0035] In some embodiments, referring to Figure 2 , Figure 3 and Figure 7 , both the main box 10 and the sub-box 20 include a box body 11 and a box cover 12; a connecting ear 101 is provided on the box body 11 of the main box 10; the first clamping structure 102 is provided on the box cover 12 or the side wall of the box body 11 of the main box 10, the second clamping structure 21 is provided on the box cover 12 or the side wall of the box body 11 of the sub-box 20, and the third clamping structure 22 is provided on the bottom wall or the side wall of the box body 11 of the sub-box 20.

[0036] The box body 11 and the box cover 12 can be a detachable structure connected by fasteners such as screws, or can also be connected in a manner of hinged at one end and screwed or clamped at the other end, which can facilitate opening the box cover 12 for power connection operations; on this basis, considering that the box cover 12 adopts a flat structure, when the main box 10 and the sub-box 20 need to be arranged in a vertically stacked manner, the first clamping structure 102 is arranged on the box cover 12 of the main box 10, the second clamping structure 21 is arranged on the box cover 12 of the sub-box 20, and the third clamping structure 22 is arranged on the bottom wall of the box body 11 of the sub-box 20. When the main box 10 and the sub-box 20 are arranged horizontally, since the side wall area of the box cover 12 is small, each clamping structure is respectively arranged on the corresponding side wall of the box body 11, so as to ensure the connection reliability.

[0037] In some possible implementation manners, please refer to Figures 2 to 6, the upper surface of the lid 12 is provided with a horizontal slot 121, and a limiting rib 122 is arranged in the horizontal slot 121. The horizontal slot 121 and the limiting rib 122 together form the first clamping structure 102 or the second clamping structure 21; the third clamping structure 22 includes an insertion part 221 arranged on the bottom wall of the box body 11 and a retaining rib 222. Wherein, the insertion part 221 is adapted to be inserted and matched with the horizontal slot 121, and the retaining rib 222 is used to form a clamping fit with the limiting rib 122 when the insertion part 221 is inserted in place.

[0038] Here, the horizontal slot 121 can be an inverted T-shaped slot or a dovetail slot extending horizontally along the length direction of the lid 12, and one end of the horizontal slot 121 is open and the other end is partially or completely closed. The cross-sectional structure of the insertion part 221 is the same as that of the horizontal slot 121. When installing the sub-box 20 on the main box 10 or continuing to install the sub-box 20 on the sub-box 20, the insertion part 221 is inserted from the open end of the horizontal slot 121 to the bottom. During the insertion process, the retaining rib 222 and the limiting rib 122 complete the clamping, so as to prevent the insertion part 221 from slipping out of the horizontal slot 121 and improve the clamping reliability.

[0039] Specifically, as Figure 4 and Figure 6 shown, the upper surface of the lid 12 is provided with a groove 123. Horizontal slots 121 are respectively arranged on the two side walls of the groove 123. The horizontal slots 121 extend from one end of the groove 123 to the other end and form a limiting surface 1211 at the extending end. The limiting rib 122 is arranged at the bottom of the groove 123; wherein, when the insertion part 221 is inserted into the horizontal slot 121 and abuts against the limiting surface 1211, the retaining rib 222 and the limiting rib 122 are clamped.

[0040] Here, the groove 123 can be directly opened on the upper surface of the lid 12, or a patch board 124 can be attached to the upper surface of the lid 12 and then the groove 123 is opened on the patch board 124. In order to avoid the groove 123 affecting the structural strength of the lid 12, it is preferably to set the patch board 124 on the upper surface of the lid 12 and open the groove 123 on the patch board 124. The groove 123 penetrates the entire patch board 124. At the same time, horizontal slots 121 are respectively opened on the two opposite side walls of the groove 123, so that the horizontal slots 121 and the groove 123 together form an inverted T-shaped cross-sectional structure, and the horizontal slots 121 extend from one end of the groove 123 to the other end but do not penetrate the patch board 124. Therefore, the extending end of the horizontal slot 121 can be formed as the limiting surface 1211. When the insertion part 221 is inserted into the horizontal slot 121 to a depth where it abuts against the limiting surface 1211, it cannot be inserted further. On this basis, through the clamping fit of the retaining rib 222 and the limiting rib 122, the insertion part 221 is fixed within the horizontal slot 121 to ensure stable and reliable clamping.

[0041] In some embodiments, the above-mentioned insertion part 221 adopts the structure as shown in Figure 3 . The insertion part 221 includes a boss 2211 protruding from the lower surface of the box body 11, and clamping edges 2212 protruding from both sides of the boss 2211. Among them, the boss 2211 is adapted to be inserted into the groove 123, and an anti-retreat rib 222 is provided on the lower surface of the boss 2211. The clamping edges 2212 are in plug-in fit with the horizontal slot 121. The boss 2211 forms an inverted T-shaped structure based on the clamping edges 2212 protruding from both sides thereof, so as to be adapted to the inverted T-shaped structure formed by the groove 123 and the horizontal slot 121. On this basis, an avoidance groove 2213 can be opened on the lower surface of the boss 2211, and the anti-retreat rib 222 is arranged at the bottom of the avoidance groove 2213. Thus, during the process of inserting the boss 2211 into the groove 123, the avoidance groove 2213 can be used to avoid the limit rib 122, and when the anti-retreat rib 222 moves from one side of the limit rib 122 to the other side, a clamping connection is formed to prevent the boss 2211 from slipping back in the reverse direction.

[0042] It should be noted that, please refer to Figure 4 and Figure 6 . In this embodiment, both the limit rib 122 and the anti-retreat rib 222 are wedge-shaped ribs. The wedge-shaped rib includes a guiding inclined surface 1221 and a clamping vertical surface 1222. Among them, when the insertion part 221 abuts against the limiting surface 1211, the clamping vertical surfaces 1222 of the anti-retreat rib 222 and the limit rib 122 form a clamping fit. During the process of inserting the boss 2211 into the groove 123, an extrusion contact is formed between the guiding inclined surfaces 1221 of the anti-retreat rib 222 and the limit rib 122. The anti-retreat rib 222 and the limit rib 122 produce a certain elastic deformation under the extrusion action until the anti-retreat rib 222 completely slides past the limit rib 122 and then recovers, so that the clamping vertical surfaces 1222 of the two are in abutment in the horizontal direction. And because at this time the clamping edge 2212 abuts against the limiting surface 1211, a two-way limit is formed on the boss 2211 in the insertion direction of the boss 2211 and the groove 123, thereby ensuring the clamping reliability.

[0043] As another connection method between the main box 10 and each sub-box 20, please refer to Figure 7 and Figure 8 . At least two first clamping structures 102 are horizontally and spacedly distributed on the side wall of the box body 11 of the main box 10. At least two second clamping structures 21 and at least two third clamping structures 22 are respectively and correspondingly arranged on two opposite side walls of the box body 11 of the sub-box 20; among them, both the first clamping structure 102 and the second clamping structure 21 are adapted to be in clamping fit with the third clamping structure 22 in the vertical direction.

[0044] Since both the main box 10 and the auxiliary box 20 are long strip-shaped, the height dimension of the side wall is much smaller than the length dimension. At the same time, considering that it is more convenient to operate when the auxiliary boxes 20 are assembled by vertical plugging during row arrangement, the corresponding clamping structure needs to be arranged vertically. However, due to the small vertical dimension of the box body 11, a multi-point arrangement is adopted to improve the clamping stability. It should be understood that each of the clamping structures here can have the same cross-section as the clamping structure adopted in the stacking arrangement in the above embodiments, and only need to be adaptively changed in terms of position, size and quantity. Of course, each of the clamping structures here can also be other concave-convex matching structural forms.

[0045] It should be noted that in some embodiments, as Figure 5 shown, one end of the box body 11 is provided with a hinge ear 111, the other end is provided with a buckle 112, one end of the box cover 12 is rotatably connected to the hinge ear 111, and the other end is provided with a snap ring 125. The snap ring 125 is in snap-fit with the buckle 112. After the box cover 12 is sealed on the box body 11, the snap ring 125 is sleeved on the buckle 112 to form a snap connection with the bottom of the buckle 112, which can not only ensure the closing stability of the box cover 12, but also facilitate opening the box cover 12 for power connection operation.

[0046] It should be explained that, please refer to Figure 5 and Figure 8 , the above main box 10 and each auxiliary box 20 are both provided with a first power connection terminal 13 and a second power connection terminal 14 extending from both ends thereof, and a fuse 15 is provided in both the main box 10 and the auxiliary box 20. The fuse 15 is used to connect and conduct the first power connection terminal 13 and the second power connection terminal 14. Two circuits in the same functional circuit are respectively connected to the first power connection terminal 13 and the second power connection terminal 14 to be conducted, and the fuse 15 provides an overload circuit for the functional circuit, thereby improving the safety of the vehicle circuit.

[0047] Based on the same inventive concept, combined with Figures 1 to 8 understanding, the embodiment of the present application further provides a vehicle, including the above functional circuit distribution box.

[0048] Compared with the prior art, the vehicle provided by the present utility model adopts the above functional circuit distribution box, and forms a modular assembly method through the main box 10 and at least one auxiliary box 20, and can adaptively increase or decrease the number of auxiliary boxes 20 according to the required quantity of the large-current functional circuit of the vehicle, so as to avoid circuit redundancy in the distribution box, which can not only improve the adaptability of the distribution box to the vehicle model configuration, but also save space and cost; in addition, each auxiliary box 20 and the main box 10 can be connected into one body in a vertical stacking and sequential clamping manner, or horizontally arranged and sequentially clamped into a row, so as to facilitate and reasonably plan the installation space, and improve the convenience, flexibility and compactness of the vehicle wiring harness layout.

[0049] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. Functional circuit junction box, characterized in that: The invention comprises a main box (10) and at least one sub-box (20), wherein the main box (10) and each of the sub-boxes (20) are respectively used to connect a functional circuit and provide overload protection for the functional circuit; the main box (10) has a connecting ear (101) for connecting to a vehicle body; a first clamping structure (102) is provided on the side wall and / or the top wall of the main box (10); a second clamping structure (21) and a third clamping structure (22) are respectively provided on two opposite wall surfaces of the sub-box (20); wherein both the first clamping structure (102) and the second clamping structure (21) are suitable for forming a clamping fit with the third clamping structure (22).

2. The functional circuit junction box according to claim 1, characterized in that: The main box (10) and the auxiliary box (20) both comprise a box body (11) and a box cover (12); the box body of the main box (10) is provided with the connecting ear (101); the first clamping structure (102) is provided on the box cover or the side wall of the box body of the main box (10), the second clamping structure (21) is provided on the box cover or the side wall of the box body of the auxiliary box (20), and the third clamping structure (22) is provided on the bottom wall or the side wall of the box body of the auxiliary box (20).

3. The functional circuit junction box according to claim 2, characterized in that: The upper surface of the box cover (12) is provided with a horizontal slot (121), and a limiting clamping rib (122) is provided in the horizontal slot (121), and the horizontal slot (121) and the limiting clamping rib (122) together form the first clamping structure (102) or the second clamping structure (21); the third clamping structure (22) comprises an insertion portion (221) and a stop clamping rib (222) provided on the bottom wall of the box body (11), wherein the insertion portion (221) is suitable for plugging and matching with the horizontal slot (121), and the stop clamping rib (222) is used to form a snap-fitting fit with the limiting clamping rib (122) when the insertion portion (221) is plugged into place.

4. The functional circuit junction box according to claim 3, characterized in that: The upper surface of the box cover (12) is provided with a groove (123), and the groove walls on both sides of the groove (123) are respectively provided with the horizontal slots (121), the horizontal slots (121) extend from one end of the groove (123) to the other end and form a limiting surface (1211) at the extended end, and the limiting clamping rib (122) is arranged at the groove bottom of the groove (123); wherein, when the insertion portion (221) is inserted into the horizontal slot (121) and abuts against the limiting surface (1211), the anti-retraction clamping rib (222) is clamped with the limiting clamping rib (122).

5. The functional circuit junction box according to claim 4, characterized in that: The insertion portion (221) comprises a boss (2211) protruding from the lower surface of the box body (11), and clamping edges (2212) protruding from both sides of the boss (2211), wherein the boss (2211) is suitable for being inserted into the groove (123), and the lower surface of the boss (2211) is provided with the anti-retraction clamping rib (222), and the clamping edge (2212) is plugged into the horizontal slot (121).

6. The functional circuit junction box according to claim 4, characterized in that: The position-limiting clamping rib (122) and the anti-retraction clamping rib (222) are both wedge-shaped ribs, and the wedge-shaped ribs include a guiding inclined surface (1221) and a clamping vertical surface (1222), wherein when the insertion portion (221) abuts against the position-limiting surface (1211), the clamping vertical surfaces (1222) of the anti-retraction clamping rib (222) and the position-limiting clamping rib (122) form a clamping fit.

7. The functional circuit junction box according to claim 2, characterized in that: At least two of the first snap-fitting structures (102) are horizontally spaced apart on the side wall of the box body (11) of the main box (10), and at least two second snap-fitting structures (21) and at least two third snap-fitting structures (22) are respectively arranged on two opposite side walls of the box body (11) of the auxiliary box (20); wherein the first snap-fitting structure (102) and the second snap-fitting structure (21) are both suitable for snap-fitting with the third snap-fitting structure (22) in a vertical direction.

8. The functional circuit junction box according to claim 2, characterized in that: One end of the box body (11) is provided with a hinged ear (111), and the other end is provided with a buckle (112); one end of the box cover (12) is rotatably connected to the hinged ear (111), and the other end is provided with a buckle (125); the buckle (125) is buckled with the buckle (112).

9. The functional circuit junction box according to any one of claims 1 to 8, characterized in that: The main box (10) and each of the auxiliary boxes (20) have a first power terminal (13) and a second power terminal (14) extending from both ends thereof, and a fuse (15) is provided in each of the main box (10) and the auxiliary box (20), and the fuse (15) is used to connect and conduct the first power terminal (13) and the second power terminal (14).

10. A vehicle, characterized in that It comprises a functional circuit junction box as described in any one of claims 1 to 9.

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