Photovoltaic junction box

Abstract

The utility model discloses a photovoltaic junction box, which comprises a junction box main body, a cover plate and a wire hole, the junction box comprises a junction box body, a clamping mechanism, an upper clamping seat, a moving column and a threaded rod, the bottom end of the threaded rod is rotationally connected with the inner wall of the junction box body through a bearing, the outer wall of the threaded rod is connected with a lower clamping seat through threads, and the lower clamping seat is located under the upper clamping seat. According to the photovoltaic junction box, the clamping mechanism is arranged; the cover plate rotates to be closed, the bottom end of the cover plate extrudes the moving rod to move, the moving rod moves downwards to drive the upper clamping base and the lower clamping base to move oppositely through mechanical transmission, then the wire harness placed in the wire hole is clamped and limited, and the stability of the wire harness after being connected with the junction box body is improved; compared with a traditional mode of fixing the wire harness and the junction box main body through multiple bolts, convenience of connection of the wire harness and the junction box main body is improved, and therefore efficiency of wire harness clamping and fixing is also improved.

Description

Technical Field

[0001] This utility model relates to the field of junction box device technology, specifically a photovoltaic junction box. Background Technology

[0002] Photovoltaic junction boxes are an important component of solar cell modules. Their main function is to connect the electricity generated by the solar cells to external lines and transmit the electrical energy. The junction box uses terminals and connectors to lead the current generated by the solar modules and conduct it into electrical equipment, such as inverters and other control devices. The junction box connects the solar modules to the load, leading out the current generated by the modules and generating power. In order to minimize the power loss of the modules due to the junction box, the conductive materials used in the junction box must have low resistance, and the contact resistance with the busbar leads must be low.

[0003] Currently, photovoltaic junction boxes are used by drilling wire holes in the outer shell of the junction box, passing the wire harness through the wire holes to the inside of the junction box, and then connecting the wire harness to the inner wall of the junction box with multiple fastening bolts. This prevents the wire harness from detaching from the junction box during use. However, because there are multiple fastening bolts and tools are required for bolt installation, the installation and removal of the fastening bolts is time-consuming and laborious, thus reducing the efficiency of installing and removing the wire harness and junction box.

[0004] In response to the existing problems, it is necessary to provide a new technical solution for photovoltaic junction boxes. Utility Model Content

[0005] The purpose of this utility model is to provide a photovoltaic junction box to solve the technical problem in the background art that the method of installing wire harnesses and junction boxes by tightening bolts is time-consuming and laborious.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A photovoltaic junction box includes a junction box body, a cover plate rotatably connected to the top of the junction box body, and two wire holes at one end of the junction box body. A clamping mechanism is disposed at the top of the junction box body and extends into the junction box body and the wire holes. The clamping mechanism is used to clamp wire harnesses placed inside the wire holes, thereby improving the stability of the wire harnesses after connection to the junction box body. The clamping mechanism includes an upper clamping seat slidably fitted inside the junction box body. A movable column is fixed to the bottom end of the upper clamping seat by bolts. A threaded rod is sleeved on the bottom end of the movable column. The bottom end of the threaded rod is rotatably connected to the inner wall of the junction box body via a bearing. A lower clamping seat is threadedly connected to the outer wall of the threaded rod, and the lower clamping seat is located directly below the upper clamping seat.

[0008] Preferably, a movable rod is fixed to the top of the upper clamping seat by bolts, the movable rod extends through to the top of the junction box body, and the top of the movable rod is arc-shaped.

[0009] Preferably, a protrusion is fixed to one side of the upper clamping seat by bolts, and a limiting post is slidably sleeved inside the protrusion. The top and bottom ends of the limiting post are respectively fixedly connected to the inner wall of the junction box body by bolts.

[0010] Preferably, the bottom end of the upper clamping seat is fixedly connected to a spring sleeved on the outer wall of the limiting post, and the bottom end of the spring is fixedly connected to the inner wall of the junction box body.

[0011] Preferably, there are two protrusions, and the two protrusions are symmetrically distributed on both sides of the movable column.

[0012] Preferably, the outer wall of the threaded rod is connected to a support seat via a bearing, and one end of the support seat is fixedly connected to the inner wall of the junction box body via bolts.

[0013] Preferably, the bottom end of the movable column extends into the interior of the threaded rod, and the bottom end of the movable column is fixed with a frustum by bolts.

[0014] Preferably, the inner wall of the threaded rod is provided with a sliding groove, which matches the movement trajectory of the frustum.

[0015] Preferably, the inner wall of the sliding groove is provided with a spiral groove, which is sleeved with the ball.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This utility model incorporates a clamping mechanism. By rotating and closing the cover plate, the bottom end of the cover plate presses the moving rod to move. The downward movement of the moving rod can drive the upper and lower clamping seats to move towards each other via mechanical transmission, thereby clamping and limiting the wire harness placed inside the wire hole. This improves the stability of the wire harness after it is connected to the junction box body. Compared with the traditional method of fixing the wire harness to the junction box body with multiple bolts, this method improves the convenience of connecting the wire harness to the junction box body and also increases the efficiency of clamping and fixing the wire harness. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the cover plate in the open state of this utility model.

[0020] Figure 3 This is a schematic diagram of the internal structure of the junction box of this utility model.

[0021] Figure 4 For the present utility model Figure 3 A magnified structural diagram at point A in the diagram.

[0022] Figure 5 This is a schematic diagram of the internal structure of the threaded rod of this utility model.

[0023] Figure 6 For the present utility model Figure 5 A magnified structural diagram at point B in the diagram.

[0024] In the diagram: 1. Junction box body; 2. Cover plate; 3. Wire hole; 4. Clamping mechanism; 401. Moving rod; 402. Upper clamping seat; 4021. Protrusion; 4022. Limiting post; 4023. Spring; 403. Moving post; 4031. Frustum; 4032. Ball bearing; 404. Threaded rod; 4041. Support seat; 4042. Sliding groove; 4043. Spiral groove; 405. Lower clamping seat. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0026] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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 limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figures 1-6 This utility model provides a photovoltaic junction box:

[0030] A photovoltaic junction box includes a junction box body 1, a cover plate 2 rotatably connected to the top of the junction box body 1 for opening and closing, and the junction box body 1 and the cover plate 2 being connected by a locking mechanism. Two wire holes 3 are provided at one end of the junction box body 1 for guiding wire harnesses into the interior of the junction box body 1. A clamping mechanism 4 is disposed at the top of the junction box body 1 and extends into the interior of the junction box body 1 and the wire holes 3. The clamping mechanism 4 is used to clamp the wire harness placed inside the wire holes 3, thereby improving the stability of the wire harness after connection to the junction box body 1. The clamping mechanism 4 includes an upper clamping seat slidably sleeved inside the junction box body 1. 402, the bottom end of the upper clamping seat 402 is fixed with a movable column 403 by bolts, the bottom end of the movable column 403 is sleeved with a threaded rod 404, the bottom end of the threaded rod 404 is rotatably connected to the inner wall of the junction box body 1 by a bearing, the outer wall of the threaded rod 404 is threadedly connected with a lower clamping seat 405, the lower clamping seat 405 is located directly below the upper clamping seat 402, the upper clamping seat 402 can move downward to drive the movable column 403 to move, the threaded rod 404 can rotate to drive the lower clamping seat 405 to move upward. When the upper clamping seat 402 and the lower clamping seat 405 move towards each other, the outer wall of the wire harness placed inside the wire hole 3 can be clamped, thereby improving the stability of the wire harness after it is connected to the junction box body 1;

[0031] A movable rod 401 is bolted to the top of the upper clamping seat 402. The movable rod 401 extends through to the top of the junction box body 1, and its top is arc-shaped. This design allows the bottom of the cover plate 2 to press the movable rod 401 downwards when the cover plate 2 is closed, thus moving the upper clamping seat 402 downwards. A protrusion 4021 is bolted to one side of the upper clamping seat 402. A limiting post 4022 is slidably fitted inside the protrusion 4021. The top and bottom of the limiting post 4022 are bolted to the inner wall of the junction box body 1. The protrusion 4021 and the limiting post 4022 ensure the stability of the vertical movement of the upper clamping seat 402. A spring 4023 is fixedly connected to the bottom of the upper clamping seat 402. The spring 4023 is fixedly connected to the inner wall of the junction box body 1 on the outer wall of the limiting post 4022. The spring 4023 is used to maintain the initial position of the protrusion 4021 and to provide a vertical moving and restoring force to the protrusion 4021. There are two protrusions 4021, which are symmetrically distributed on both sides of the moving post 403. This structure can assist the upper clamping seat 402 in moving and ensure the stability of the upper clamping seat 402 when moving. The outer wall of the threaded rod 404 is connected to the support seat 4041 through the bearing. One end of the support seat 4041 is fixedly connected to the inner wall of the junction box body 1 through the bolt. The support seat 4041 is used to support the threaded rod 404, thereby ensuring the stability of the threaded rod 404 when rotating.

[0032] The bottom end of the movable column 403 extends into the interior of the threaded rod 404, and a frustum 4031 is fixed to the bottom end of the movable column 403 by bolts. The frustum 4031 limits the movement of the movable column 403 and the threaded rod 404, preventing separation. A sliding groove 4042 is provided on the inner wall of the threaded rod 404. The sliding groove 4042 matches the movement trajectory of the frustum 4031. It can ensure the stability of the vertical movement of the frustum 4031; the inner wall of the sliding groove 4042 is provided with a spiral groove 4043, which is sleeved with the ball 4032. Through the arrangement of the ball 4032 and the spiral groove 4043, the ball 4032 can be driven to move when the frustum 4031 moves. The ball 4032 moves and squeezes the inner wall of the spiral groove 4043, thereby driving the spiral groove 4043 to rotate. The rotation of the spiral groove 4043 can drive the threaded rod 404 to rotate.

[0033] The working principle of this utility model is as follows: When using this device, first rotate to open the cover plate 2, then pass the wire harness through the wire hole 3 into the interior of the junction box body 1. After connecting the wire harness with the electronic components inside the junction box body 1, reset and close the cover plate 2. During the reset and rotation of the cover plate 2, it contacts the top of the moving rod 401, thereby squeezing the moving rod 401 to move downward. The moving rod 401 moves and drives the upper clamping seat 402 to move downward. The movement of the upper clamping seat 402 drives the protrusion 4021 to move. The spring 4023 is squeezed by force, and the upper clamping seat 402 moves downward and squeezes the outer wall of the wire harness inside the wire hole 3.

[0034] Secondly, when the upper clamping seat 402 moves downward, it drives the moving column 403 to move. The moving column 403 moves, which drives the frustum 4031 to move. The frustum 4031 moves, which drives the ball 4032 to move. The ball 4032 moves downward and presses the inner wall of the spiral groove 4043, which in turn drives the spiral groove 4043 to rotate. The rotation of the spiral groove 4043 drives the threaded rod 404 to rotate. The rotation of the threaded rod 404 drives the lower clamping seat 405 to move upward. The lower clamping seat 405 moves upward and presses the outer wall of the wire harness. After the cover plate 2 is reset and closed, the junction box body 1 and the cover plate 2 are connected by a locking mechanism. At this time, the wire harness inside the wire hole 3 is firmly connected to the junction box body 1.

[0035] Finally, by rotating and closing the cover plate 2, the bottom end of the cover plate 2 presses the moving rod 401 to move. The downward movement of the moving rod 401 can drive the upper clamping seat 402 and the lower clamping seat 405 to move towards each other through mechanical transmission, thereby clamping and limiting the wire harness placed inside the wire hole 3. This improves the stability of the wire harness after it is connected to the junction box body 1. Compared with the traditional method of fixing the wire harness to the junction box body 1 with multiple bolts, this method improves the convenience of connecting the wire harness to the junction box body 1 and also improves the efficiency of clamping and fixing the wire harness.

[0036] The above description is merely an embodiment of this utility model, and common knowledge regarding specific structures and characteristics is not described in detail here. It will be apparent to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A photovoltaic junction box, characterized in that, It includes: Junction box body (1), the top of the junction box body (1) is rotatably connected to a cover plate (2), and two wire holes (3) are opened at one end of the junction box body (1); A clamping mechanism (4) is provided at the top of the junction box body (1) and extends into the junction box body (1) and the wire hole (3). The clamping mechanism (4) includes an upper clamping seat (402) that is slidably sleeved inside the junction box body (1). The bottom end of the upper clamping seat (402) is fixed with a moving column (403) by bolts. The bottom end of the moving column (403) is sleeved with a threaded rod (404). The bottom end of the threaded rod (404) is rotatably connected to the inner wall of the junction box body (1) by a bearing. The outer wall of the threaded rod (404) is connected with a lower clamping seat (405) by threads. The lower clamping seat (405) is located directly below the upper clamping seat (402).

2. A photovoltaic junction box according to claim 1, characterized in that: The top of the upper clamping seat (402) is fixed with a movable rod (401) by bolts. The movable rod (401) extends through to the top of the junction box body (1), and the top of the movable rod (401) is arc-shaped.

3. A photovoltaic junction box according to claim 1, characterized in that: One side of the upper clamping seat (402) is fixed with a protrusion (4021) by bolts. The protrusion (4021) is slidably sleeved with a limiting post (4022). The top and bottom ends of the limiting post (4022) are respectively fixedly connected to the inner wall of the junction box body (1) by bolts.

4. A photovoltaic junction box according to claim 3, characterized in that: The bottom end of the upper clamping seat (402) is fixedly connected to a spring (4023) which is sleeved on the outer wall of the limiting post (4022), and the bottom end of the spring (4023) is fixedly connected to the inner wall of the junction box body (1).

5. A photovoltaic junction box according to claim 3, characterized in that: Two protrusions (4021) are provided, and the two protrusions (4021) are symmetrically distributed on both sides of the movable column (403).

6. A photovoltaic junction box according to claim 1, characterized in that: The outer wall of the threaded rod (404) is connected to a support seat (4041) via a bearing, and one end of the support seat (4041) is fixedly connected to the inner wall of the junction box body (1) by bolts.

7. A photovoltaic junction box according to claim 1, characterized in that: The bottom end of the movable column (403) extends into the interior of the threaded rod (404), and the bottom end of the movable column (403) is fixed with a frustum (4031) by bolts.

8. A photovoltaic junction box according to claim 7, characterized in that: The inner wall of the threaded rod (404) is provided with a sliding groove (4042), which matches the movement trajectory of the frustum (4031).

9. A photovoltaic junction box according to claim 8, characterized in that: The inner wall of the sliding groove (4042) is provided with a spiral groove (4043), which is sleeved with the ball (4032).

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