AC terminal block structure

Abstract

The utility model provides an alternating current terminal box structure, including the casing, is set up the bearing groove on the bottom plate of casing, forms the mouth of depositing in the middle part of bearing groove is passed through, is provided with the terminal seal spare on bearing groove, is set up the threading hole on terminal seal spare, terminal seal spare sets up in the inside of casing, terminal seal spare is straddled and sets up on bearing groove, and the mouth of depositing is shielded, is provided with the connecting piece on terminal seal spare, the connecting piece is connected with the casing after passing through terminal seal spare from the inside of casing. Set up bearing groove on the casing makes that terminal seal board can set up in the inside of casing, set up the mouth of depositing simultaneously, facilitate threading, set up the connecting piece from inside to outside, avoid the operator to squat and assemble the connection from the bottom of casing.

Description

Technical Field

[0001] This utility model relates to the field of wiring board technology, and is particularly applicable to an AC junction box structure. Background Technology

[0002] With the rapid development of the photovoltaic power generation industry, the power of string photovoltaic inverters is getting bigger and bigger, the AC output current is also getting bigger and bigger, and the corresponding cables are getting thicker and thicker, making customer wiring a bottleneck.

[0003] TPE cable trays are currently widely used for sealing AC cables in the field. Often, the cable tray is fixed to the bottom of the junction box with screws from below. However, it is difficult to install cable trays with cables in the field. On-site customers need to squat under the junction box to assemble the cable tray with screws, which makes the connection difficult. Summary of the Invention

[0004] The purpose of this utility model is to solve the above-mentioned problems and provide an AC junction box structure.

[0005] To achieve the above-mentioned utility model objectives, this utility model provides an AC junction box structure, including a housing, a bearing groove formed on the bottom plate of the housing, and a placement opening formed through the middle of the bearing groove; A wiring seal is provided on the bearing groove, and a wire through hole is provided on the wiring seal. The wiring seal is located inside the housing and spans the bearing groove, thus blocking the placement opening. A connector is provided on the wiring seal, and the connector passes through the wiring seal from inside the housing and connects to the housing.

[0006] More specifically, the bearing groove includes a horizontally arranged bearing plane and a vertically arranged contact plane, and part of the contact plane is recessed to the side away from the wiring seal to form a snap-fit ​​groove, and the wiring seal plate is inserted into the snap-fit ​​groove.

[0007] More specifically, the snap-fit ​​groove is located on one side near the inside of the housing.

[0008] More specifically, a limiting reinforcing rib is provided on the housing, and the limiting reinforcing rib is located above the snap-fit ​​groove.

[0009] More specifically, the wiring sealing plate and the snap-fit ​​groove are interference-fitted.

[0010] More specifically, a mounting protrusion is provided on the housing, and a connecting plate is provided on the side of the wiring seal near the mounting protrusion, with the connecting member passing through the connecting member and the mounting protrusion in sequence.

[0011] More specifically, a bent portion is provided on the outer side of the wiring seal, and the bent portion is flush with the outer side of the housing; The bent portion includes a first plate connected to the wiring seal and a second plate connected to the first plate, with an clearance groove provided on the second plate.

[0012] More specifically, the first plate has extended protrusions at both ends, and the housing has extended grooves, with the extended protrusions inserted into the extended grooves.

[0013] More specifically, a first connection port is provided on the bearing groove, a second connection port is provided on the wiring seal, a second connector is provided in the second connection port, and the second connector passes through the second connection port and the first connection port in sequence.

[0014] More specifically, a limiting protrusion is provided on the side of the wiring seal near the placement port, and the limiting protrusion abuts against the placement port.

[0015] This utility model mainly designs an AC junction box structure. By setting a bearing groove on the housing, the wiring sealing plate can be placed inside the housing. At the same time, a placement opening is provided to facilitate wire threading. Connectors are arranged from the inside to the outside, avoiding the need for operators to squat down to assemble and connect from the bottom of the housing. Attached Figure Description

[0016] Exemplary embodiments of this application will now be described in detail with reference to the accompanying drawings. It should be understood that the embodiments described below are for illustrative purposes only and do not limit the scope of this application. In the accompanying drawings: Figure 1 This is a schematic diagram of the three-dimensional structure of this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the three-dimensional structure of this utility model. Figure 2 ; Figure 3 This is a cross-sectional structural schematic diagram of the present invention; Figure 4 This is the utility model Figure 3 Enlarged view at point B in the middle; Figure 5 This is a bottom view structural diagram of this utility model; Figure 6 This is a three-dimensional structural diagram of the shell and cover plate of this utility model. Figure 7 This is the utility model Figure 6 Enlarged view of point A in the middle; Figure 8 This is a three-dimensional structural diagram of the wiring seal of this utility model; In the diagram: 1. Shell; 11. Bearing groove; 111. Bearing plane; 112. Snap-fit ​​groove; 113. Contact plane; 12. Placement opening; 13. Mounting protrusion; 131. First bolt hole; 14. First connection port; 15. Extension groove; 16. Limiting reinforcing rib; 2. Cover plate; 3. Wiring seal; 31. Elastic sleeve; 32. Elastic seal; 33. Connecting plate; 331. Second bolt hole; 34. Second connection port; 351. First plate; 352. Second plate; 36. Extension protrusion; 37. Limiting protrusion. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this utility model. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0018] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model. The embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0019] It should be understood that the accompanying drawings are for illustrative purposes only.

[0020] An AC junction box structure, such as Figures 1-8 As shown, it includes a housing 1, and a cover plate 2 is provided on the housing 1 to close the housing 1.

[0021] The bottom plate of the housing 1 is used to fix components. Side plates surround the bottom plate. When the housing 1 is placed vertically, the bottom side plate is located at the bottom. A support groove 11 is formed on the bottom side plate of the housing 1. The support groove 11 is located inside the housing 1. A placement opening 12 is formed through the center of the support groove 11. The placement opening 12 is smaller than the support groove 11. After the placement opening 12 is formed, the bottom surface of the support groove 11 still has a support plane 111. Furthermore, to facilitate the placement of the wiring seal 3, the side of the support groove 11 closest to the cover plate 2 is open.

[0022] The bearing groove 11 includes a bearing plane 111 and a contact plane. The bearing plane 111 is used to place the wiring seal 3, and the contact plane is the vertical surface between the bearing plane 111 and the bottom plate of the housing 1.

[0023] A wiring seal 3 is provided on the bearing groove 11. The shape of the bearing groove 11 and the wiring seal 3 are adapted to each other so that the wiring seal 3 can be completely fitted into the bearing groove 11 to ensure the sealing of the housing 1. The wiring seal 3 is located inside the housing 1 and spans the bearing groove 11. The bearing plane 111 supports the wiring seal 3 and the wiring seal 3 covers the placement opening 12. A connector is provided on the wiring seal 3. The connector passes through the wiring seal 3 and the housing 1 in sequence inside the housing 1 to connect the wiring seal 3 to the housing 1.

[0024] Furthermore, a mounting protrusion 13 is provided on the housing 1, extending towards the interior of the housing 1. A first bolt hole 131 is provided on the mounting protrusion 13, forming a hidden space within the mounting protrusion 13. A connecting plate 33 is provided on the side of the wiring seal 3 near the mounting protrusion 13, and a second bolt hole 331 is provided on the connecting plate 33. The connector passes sequentially through the second bolt hole 331 of the connecting plate 33 and the first bolt hole 131 of the mounting protrusion 13, connecting the wiring seal 3 and the housing 1 together. After the connector is connected, it is accommodated within the hidden space.

[0025] Threads are provided on the first bolt hole 131 and the second bolt hole 331 to facilitate subsequent connection.

[0026] To further ensure the connection between the housing 1 and the wiring seal 3, a first connection port 14 is provided on the bearing plane 111 of the bearing groove 11, and a second connection port 34 is provided on the wiring seal 3. A second connector is provided in the second connection port 34, and the second connector passes through the second connection port 34 and the first connection port 14 in sequence to connect the wiring seal 3 and the housing 1 together.

[0027] The first connection port 14 and the second connection port 34 are configured as threaded holes.

[0028] The connector can be any detachable connection structure, including but not limited to bolts, screws, studs, etc. In this solution, both the connector and the second connector are screws, and the screw head is placed inside the housing 1.

[0029] To better ensure the sealing connection between the wiring seal 3 and the housing 1, a portion of the contact surface 113 is recessed away from the wiring seal 3 to form a locking groove 112. The wiring seal 3 is inserted into the locking groove 112, which not only achieves a better seal but also limits the positioning of the wiring seal 3. Furthermore, the locking groove 112 can be formed by the entire contact surface 113 or only a portion of the contact surface 113. In this design, the locking groove 112 is only formed on the side closest to the inside of the housing 1. To prevent the wiring seal 3 from tilting up after being inserted into the locking groove 112, a limiting reinforcing rib 16 is provided on the housing 1. The limiting reinforcing rib 16 is positioned above the locking groove 112 and increases the strength at the locking groove 112.

[0030] Furthermore, the wiring seal 3 is interference-fitted with the snap-fit ​​groove 112 to better ensure the sealing effect.

[0031] A limiting protrusion 37 is provided on the side of the wiring seal 3 near the placement port 12. After the wiring seal 3 is placed, the limiting protrusion 37 abuts against the placement port 12, thereby limiting the wiring seal 3. The limiting protrusion 37 can be provided as a whole along the placement port 12, or several can be provided intermittently along the placement port 12. Of course, it can also be provided as a section, as long as it achieves the limiting effect.

[0032] A bend is provided on the outside of the wiring seal 3. The bend extends toward the bottom of the housing 1 and is flush with the outside of the housing 1, so as not to affect the closing of the cover plate 2.

[0033] Furthermore, the bent portion includes a first plate 351 connected to the wiring seal 3 and a second plate 352 connected to the first plate 351. An avoidance groove is provided on the second plate 352 to avoid the bearing groove 11. The first plate 351 and the second plate 352 are T-shaped as a whole. When the wiring seal 3 is placed in the bearing groove 11, the first plate 351 is placed on the bearing plane 111, and the two ends of the second plate 352 are in contact with the placement opening 12.

[0034] To better limit the positioning of the wiring seal 3, extension protrusions 36 are provided at both ends of the first plate 351, and extension grooves 15 are provided on the housing 1. After the wiring seal 3 is connected to the housing 1, the extension protrusions 36 are inserted into the extension grooves 15.

[0035] A wire-passing hole is provided on the wiring seal 3, located relative to the placement opening 12 for easy wire threading. At least one elastic sleeve 31 and at least one elastic seal 32 are provided on the wire-passing hole. The elastic sleeve 31 extends towards the inside of the housing 1, and the elastic seal 32 extends towards the outside of the housing 1. When wiring is required, the cable passes through the elastic seal 32, then through the elastic sleeve 31, and finally out of the housing 1, connecting electrically with internal components. The inner end of the cable is sealed by the elastic sleeve 31, and the outer end is sealed by the elastic seal 32, achieving a double-layer seal for the cable. This effectively prevents external dust or moisture from entering, avoiding failure of internal electrical components in the housing 1. The structure is simple, and the sealing effect is good.

[0036] Both the elastic sleeve 31 and the elastic seal 32 have an arc-shaped horn-shaped structure on their outer surfaces. The end closer to the wiring seal 3 is the first opening, and the end farther away from the wiring seal 3 is the second opening. The diameter of the first opening is larger than the diameter of the second opening.

[0037] The elastic sleeve 31 can be provided in a one-to-one correspondence with the elastic seal 32. In this case, the elastic sleeve 31 and the elastic seal 32 are coaxially arranged. The inner diameter of the first opening of the coaxial elastic sleeve 31 is equal to the inner diameter of the first opening of the elastic seal 32. Alternatively, only the elastic sleeve 31 or the elastic seal 32 can be provided on a certain wire hole.

[0038] In this design, either three elastic sleeves 31 or five elastic seals 32 can be provided.

[0039] Both the elastic sleeve 31 and the elastic seal 32 are made of elastic material.

[0040] This utility model mainly designs an AC junction box structure. A bearing groove 11 is provided on the housing 1, allowing the wiring sealing plate to be placed inside the housing 1. A placement opening 12 is provided for easy wire threading. Screws are installed from the inside out to avoid the operator having to squat down to assemble and connect from the bottom of the housing 1. An installation protrusion 13 is provided to facilitate the concealment of connectors. A snap-fit ​​groove 112 is provided, and the wiring sealing plate is interference-fitted with the snap-fit ​​groove 112 to achieve a sealed connection between the wiring sealing member 3 and the housing 1. A bending portion is provided to achieve a sealed connection between the wiring sealing member 3 and the housing 1. A limiting reinforcing rib 16 is provided to prevent the wiring sealing member 3 from warping and to increase the strength of the snap-fit ​​groove 112.

[0041] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0042] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0043] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. An AC junction box structure, characterized in that: It includes a housing (1), on which a support groove (11) is provided, and a placement opening (12) is formed through the middle of the support groove (11); A wiring seal (3) is provided on the bearing groove (11), and a wire hole is provided on the wiring seal (3). The wiring seal (3) is located inside the housing (1). The wiring seal (3) spans the bearing groove (11) and blocks the placement opening (12). A connector is provided on the wiring seal (3), and the connector passes through the wiring seal (3) from the inside of the housing (1) and connects to the housing (1).

2. The AC junction box structure according to claim 1, characterized in that: The bearing groove (11) includes a bearing surface (111) for placing the wiring seal (3) and a vertically arranged contact surface (113). Part of the contact surface (113) is recessed to the side away from the wiring seal (3) to form a snap-fit ​​groove (112), and the wiring seal (3) is inserted into the snap-fit ​​groove (112).

3. The AC junction box structure according to claim 2, characterized in that: The snap-fit ​​groove (112) is located inside the bearing groove (11).

4. The AC junction box structure according to claim 3, characterized in that: A limiting reinforcing rib (16) is provided on the housing (1), and the limiting reinforcing rib (16) is provided above the snap-fit ​​groove (112).

5. The AC junction box structure according to claim 2, characterized in that: The wiring seal (3) is interference-fitted with the snap-fit ​​groove (112).

6. The AC junction box structure according to claim 1, characterized in that: An installation protrusion (13) is provided inside the housing (1), and a connecting plate (33) is provided on the side of the wiring seal (3) near the installation protrusion (13). The connecting member passes through the connecting plate (33) and the installation protrusion (13) sequentially from inside the housing (1).

7. The AC junction box structure according to claim 2, characterized in that: A bend is provided on the outside of the wiring seal (3), and the bend is flush with the outside of the housing (1); The bending portion includes a first plate (351) connected to the wiring seal (3) and a second plate (352) connected to the first plate (351), and an avoidance groove is provided on the second plate (352).

8. The AC junction box structure according to claim 7, characterized in that: Extending protrusions (36) are provided at both ends of the first plate (351), and extending grooves (15) are provided on the housing (1), with the extending protrusions (36) inserted into the extending grooves (15).

9. The AC junction box structure according to claim 1, characterized in that: A first connection port (14) is provided on the bearing groove (11), and a second connection port (34) is provided on the wiring seal (3). A second connector is provided in the second connection port (34), and the second connector passes through the second connection port (34) and the first connection port (14) sequentially from the inside of the housing (1).

10. The AC junction box structure according to claim 1, characterized in that: A limiting protrusion (37) is provided on the side of the wiring seal (3) near the placement port (12), and the limiting protrusion (37) abuts against the placement port (12).

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