Photovoltaic connector terminal

Abstract

The utility model relates to the technical field of electrical connection in photovoltaic power generation equipment, and discloses a photovoltaic connector terminal which comprises a terminal body, the top of the terminal body is slidably connected with a retaining ring, a connecting mechanism is arranged in the retaining ring, the top of the connecting mechanism is fixedly connected with an insertion mechanism, and the insertion mechanism is fixedly connected with the terminal body. The connecting mechanism comprises a first connecting ring, the interior of the first connecting ring is connected to the interior of the retaining ring, the top of the terminal body is provided with a limiting assembly, the limiting assembly comprises a limiting sliding groove, the limiting sliding groove is formed in the top of the terminal body, and three arc-shaped hooks are slidably connected to the interior of the limiting sliding groove. According to the utility model, the automatic clamping is realized through the elastic deformation of the connection memory inclined rod, the axial tensile resistance is improved and the hook-shaped mechanical occlusion forms a secondary anti-loosening barrier through testing, and especially in a high-frequency vibration scene, the loosening risk can be reduced, and the problem of failure caused by metal fatigue of a traditional buckle is solved.

Description

Technical Field

[0001] This utility model relates to the field of electrical connection technology in photovoltaic power generation equipment, and in particular to a photovoltaic connector terminal. Background Technology

[0002] As a key component in photovoltaic power generation systems, photovoltaic connectors directly impact system safety and power generation efficiency. With the development of the photovoltaic industry, the demand for connectors is increasing year by year, while higher requirements are being placed on their reliability and ease of installation. Currently, mainstream photovoltaic connectors use a metal core as the conductive body, formed through a stamping process, which is characterized by low cost and high production efficiency. The industry is working to improve the contact stability, anti-aging performance, and ease of installation of connectors to meet the long-term usage requirements of large-scale photovoltaic power plants and complex environments.

[0003] A search revealed Chinese patent publication number CN211605469U, which discloses a stamped photovoltaic connector terminal, comprising a terminal body and a retaining ring. The terminal body and retaining ring are manufactured by a two-in-one stamping process. The upper part of the terminal body has a U-shaped rivet cup, and a groove is machined in the middle of the terminal body. The retaining ring is fitted into the groove, and symmetrical protrusions are distributed above and below the groove. The distance between two symmetrical protrusions matches the width of the retaining ring. A notch is machined at the junction of the grooves. Retaining springs are evenly distributed on the retaining ring, and symmetrical positioning claws are provided at the junction of the retaining rings. The positioning claws fold inward and engage with the notch. The protrusions and notch on the terminal body, and the corresponding positioning claws on the retaining ring, respectively limit the axial displacement and radial rotation of the retaining ring.

[0004] The aforementioned patent specification mentions that "the terminal body and the anti-reverse ring are manufactured by a two-in-one stamping process. The upper part of the terminal body has a U-shaped rivet cup, and the middle part of the terminal body is machined with a groove. The anti-reverse ring is fitted in the groove. The groove has symmetrically distributed protrusions, and the distance between two symmetrical protrusions matches the width of the anti-reverse ring. A notch is machined where the grooves meet. Anti-reverse springs are evenly distributed on the anti-reverse ring, and positioning claws are symmetrically provided at the joint of the anti-reverse rings. The positioning claws are folded inward and engaged with the notch." By limiting the anti-reverse ring axially and radially, the positioning is accurate, but there is a limitation defect in movement, which affects the long-term stability and reliability of the connector. Therefore, a photovoltaic connector terminal is proposed to solve the above problems. Utility Model Content

[0005] This utility model proposes a photovoltaic connector terminal, which aims to improve the problem of connection between the main body of some devices and the anti-locking ring in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A photovoltaic connector terminal includes a terminal body, a locking ring slidably connected to the top of the terminal body, a connecting mechanism disposed inside the locking ring, an insertion mechanism fixedly connected to the top of the connecting mechanism, the connecting mechanism including a connecting ring, the inside of the connecting ring being connected to the inside of the locking ring, a limiting component disposed on the top of the terminal body, the limiting component including a limiting groove formed on the top of the terminal body, and three arc-shaped hooks slidably connected inside the limiting groove.

[0008] Through the above solution, the precise cooperation between the limiting groove and the arc hook in the limiting component allows the anti-reverse ring to be accurately locked in the preset position of the terminal body, ensuring the accuracy of the relative positions of each component, thereby improving the precision and consistency of photovoltaic connector terminal assembly. After connection with the mating terminal, the effective positioning of the anti-reverse ring and the synergistic effect of the connection mechanism and insertion mechanism can keep the terminal in a stable connection state, significantly reducing the risk of loosening or poor contact caused by vibration, external force, etc., thereby improving the reliability of the electrical connection. The sliding connection design between the anti-reverse ring and the terminal body, combined with the quick-locking function of the limiting component, allows the terminal installation and removal process to be completed with one hand without the need for special tools, effectively reducing the difficulty and time cost of installation and maintenance. The integrated design of the connection mechanism and insertion mechanism makes the overall structure of the terminal more compact, making it more suitable for space-constrained wiring scenarios in photovoltaic systems.

[0009] As a further description of the above technical solution:

[0010] The insertion mechanism includes a connecting arc whose bottom is fixedly connected to the top of the connecting ring one, and a connecting ring two whose top is fixedly connected to the connecting arc.

[0011] The above solution ensures that the fixed connection method of the connecting arc ensures the stability of the relative position between the connecting ring two and the connecting ring, which helps the connecting ring two to be aligned with the docking terminal when connected to the docking terminal, thus improving the accuracy and reliability of the connection.

[0012] As a further description of the above technical solution:

[0013] The arc-shaped hook is externally fixedly connected to a connecting memory angled rod, which is fixedly connected inside the anti-reverse ring.

[0014] The above scheme works as follows: When the anti-reverse ring slides downward along the axial direction of the terminal body, the arc-shaped hook contacts the inclined surface at the entrance of the limiting slide groove. Due to radial compression, the connecting memory rod undergoes elastic bending deformation, and the arc-shaped hook expands outward from the anti-reverse ring. When the arc-shaped hook slides to the annular groove at the end of the limiting slide groove, the connecting memory rod generates radial elastic force due to deformation recovery, pushing the arc-shaped hook into the groove, thus achieving axial positioning of the anti-reverse ring.

[0015] As a further description of the above technical solution:

[0016] The bottom of the connecting memory diagonal bar is provided with multiple anti-slip hooks, and the outside of the anti-slip hooks is hook-shaped.

[0017] Through the above solution, the hook-shaped engagement of the anti-slip hook can provide additional axial resistance, increase the overall axial tensile strength, and make the arc-shaped hook positioning more stable.

[0018] As a further description of the above technical solution:

[0019] The terminal body has an arc-shaped connecting block inside, and the arc-shaped connecting block is circular.

[0020] The above solution works as follows: the arc-shaped connecting block uses the friction of the curved surface to prevent the connecting ring from rotating in one circumference, while the axial positioning of the anti-reverse ring completes the overall fixation.

[0021] As a further description of the above technical solution:

[0022] The terminal body has a reverse connection block inside, and the reverse connection block is an arc shape in the opposite direction.

[0023] The above scheme involves aligning the arc-shaped connecting block of the connecting ring one with the arc-shaped reverse connecting block inside the terminal body. The arc surfaces of the two are mirror-symmetrical, and their central axes coincide. The arc-shaped connecting block gradually embeds into the arc groove of the reverse connecting block, and the two form a convex-concave surface interlocking when they are in contact.

[0024] As a further description of the above technical solution:

[0025] The reverse connecting block and the arc-shaped connecting block are interlocked and connected.

[0026] The above solution eliminates radial gaps through curved surface engagement, resulting in a large contact area, low resistance, stable conductivity, strong resistance to vibration and torsion, a compact structure, and convenient assembly, making it suitable for the high-reliability connection requirements of photovoltaic connectors.

[0027] As a further description of the above technical solution:

[0028] The second connecting ring has multiple anti-slip grooves inside.

[0029] The above solution enhances the friction between the connecting ring 2 and the mating terminal, preventing loosening and ensuring stable and reliable contact. The toothed design increases conductive contact points, reduces contact resistance, improves current transmission efficiency, and supports multiple insertions and removals, adapting to the frequent connection requirements of photovoltaic systems.

[0030] This utility model has the following beneficial effects:

[0031] 1. In this utility model, automatic engagement is achieved through the elastic deformation of the connecting memory diagonal bar. Compared with the traditional protrusion-groove structure, the positioning process does not require manual intervention, and the radial elastic force can be adaptively adjusted according to the vibration amplitude. The axial tensile force is improved after testing, and the hook-shaped mechanical engagement forms a secondary anti-loosening barrier. Especially in high-frequency vibration scenarios, it can reduce the risk of loosening and solve the failure problem of traditional buckles caused by metal fatigue.

[0032] 2. In this utility model, the connecting ring is fixed in one circumference by the friction of the curved surface, which avoids poor contact caused by rotation in the traditional split structure. The tight fit design when the anti-reverse ring falls back ensures the low impedance characteristics of the current conduction path and improves the conductivity stability. Attached Figure Description

[0033] Figure 1 This is a three-dimensional schematic diagram of a photovoltaic connector terminal proposed in this utility model;

[0034] Figure 2 This is a schematic diagram of the structure of a connecting ring for a photovoltaic connector terminal according to the present invention;

[0035] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0036] Figure 4 This is a schematic diagram of the anti-slip hook structure of a photovoltaic connector terminal proposed in this utility model.

[0037] Legend:

[0038] 1. Terminal body; 2. Anti-reverse ring; 3. Connecting mechanism; 301. Connecting ring one; 302. Limiting component; 30201. Limiting groove; 30202. Connecting memory diagonal rod; 30203. Arc hook; 30204. Anti-slip hook; 303. Arc connecting block; 304. Reverse connecting block; 4. Insertion mechanism; 401. Connecting arc; 402. Connecting ring two; 403. Anti-slip groove. Detailed Implementation

[0039] 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.

[0040] Reference Figures 1 to 3This utility model provides an embodiment of a photovoltaic connector terminal, including a terminal body 1. The terminal body 1 undertakes the main function of connecting different circuit components in the photovoltaic system to ensure stable current transmission. A locking ring 2 is slidably connected to the top of the terminal body 1 to prevent the connector from loosening or falling off during use. When the connector is subjected to vibration, external pulling force, etc., the locking ring 2 can maintain the connection stability of the connector. A connecting mechanism 3 is provided inside the locking ring 2, and an insertion mechanism 4 is fixedly connected to the top of the connecting mechanism 3. The connecting mechanism 3 includes a connecting ring 301. The internal part of terminal body 1 must also be connected to the internal part of the anti-reverse ring 2. Connecting ring 301 is used to connect the anti-reverse ring 2 and the key component of the insertion mechanism 4. Connecting ring 301 provides a mounting base for the insertion mechanism 4, enabling it to connect with the mating terminal. A limiting component 302 is provided on the top of terminal body 1. The limiting component 302 includes a limiting slide groove 30201, which is located on the top of terminal body 1. Three arc-shaped hooks 30203 are slidably connected inside the limiting slide groove 30201. The limiting slide groove 30201 provides a sliding track for the arc-shaped hooks 30203. 201 ensures the accuracy and stability of the arc hook 30203 during the sliding process, enabling the arc hook 30203 to reach the designated position and achieve the locking function. The arc hook 30203 is externally fixedly connected to a connecting memory angled rod 30202, which is fixedly connected inside the anti-reverse ring 2. The arc hook 30203 moves within the limiting groove 30201 as the anti-reverse ring 2 slides. When the arc hook 30203 slides to the end of the limiting groove 30201, it can engage with the annular groove at the bottom of the groove, thereby achieving the positioning of the anti-reverse ring 2. The bottom of the connecting memory angled rod 30202... The terminal body 1 is equipped with multiple anti-slip hooks 30204. The connecting memory angle bar 30202 will undergo elastic deformation as the arc hook 30203 slides. The anti-slip hook 30204 is hook-shaped on the outside. The terminal body 1 is equipped with an arc-shaped connecting block 303 inside. The arc-shaped connecting block 303 is arc-shaped. The terminal body 1 is equipped with a reverse connecting block 304 inside. The arc-shaped connecting block 303 and the reverse connecting block 304 fit tightly together, eliminating radial gaps and ensuring the stability of the current conduction path. The reverse connecting block 304 is arc-shaped in the opposite direction. The reverse connecting block 304 and the arc-shaped connecting block 303 are interlocked and connected.

[0041] Specifically, the anti-reverse ring 2 is slid into the terminal body 1 axially along the top. The anti-reverse ring 2 is made of brass, which is high in strength and wear-resistant, and its surface is passivated to enhance environmental adaptability. The terminal body 1 is made of high-conductivity copper alloy. The connecting memory angle rod 30202 drives the arc hook 30203 to slide along the limiting groove 30201. The connecting memory angle rod 30202 is made of nickel-titanium shape memory alloy. When it reaches the end, the angle rod elastically recovers, causing the arc hook 30203 to engage in the groove, thus achieving axial positioning of the anti-reverse ring 2. At the same time, the arc-shaped connecting block 303 of the connecting ring 1 301 is embedded into the reverse connecting block 304 of the terminal body 1. The circumferential fixation is completed by the arc surface engagement, eliminating radial gaps. The connecting ring 2 402 of the insertion mechanism 4 is aligned with the mating terminal and inserted. The toothed structure of the inner wall anti-slip groove 403 is embedded in the terminal surface, forming mechanical engagement and low-resistance conductive contact. The elastic deformation of the connecting memory diagonal bar 30202 absorbs vibration energy, while the anti-slip hook 30204 hooks onto the micro-protruding structure on the surface of the terminal body 1, enhancing axial loosening through the wedge effect. The arc-shaped connecting block 303 and the arc-shaped connecting block 304's curved surface engagement structure suppresses circumferential rotation, ensuring stable connection under complex working conditions. Axially pulling the anti-lock ring 2 while applying radial rotational force causes the arc-shaped hook 30203 to disengage from the bottom groove of the limiting slide groove 30201 and the anti-slip hook 30204 to disengage, thus separating the anti-lock ring 2 from the terminal body 1 for non-destructive disassembly.

[0042] Reference Figure 1 , Figure 2 and Figure 4 The insertion mechanism 4 includes a connecting arc 401 whose bottom is fixedly connected to the top of a connecting ring 301. The connecting arc 401 ensures uniform stress distribution. A connecting ring 402 is fixedly connected to the top of the connecting arc 401. Multiple anti-slip grooves 403 are provided inside the connecting ring 402. The anti-slip grooves 403 are trapezoidal grooves evenly distributed circumferentially on the inner wall of the connecting ring 402. The bottom of the grooves is rounded to prevent stress concentration.

[0043] Specifically, during the assembly of the insertion mechanism 4, the bottom of the connecting arc 401 is first fixed to the top of the connecting ring 301, and its top is fixed to the connecting ring 402, forming a conduction chain of "connecting ring 301 - connecting arc 401 - connecting ring 402". During docking, the connecting ring 402 is aligned with the terminal and inserted axially. The trapezoidal groove of the anti-slip groove 403 on the inner wall guides the terminal to be embedded through the inclined surface. The bottom of the groove is rounded to avoid stress concentration. After being in place, the groove and the protrusion on the surface of the terminal form a mechanical engagement. At the same time, the multi-tooth contact surface pierces the oxide film and establishes a low-resistance conductive path. When disassembling, the reverse force is applied, and the elastic deformation of the anti-slip groove 403 allows the terminal to be withdrawn without permanent damage to the groove shape.

[0044] Compared with some existing devices, which often use simple snap-fit ​​or threaded connections that are prone to loosening under vibration and external force, this device uses a connecting memory inclined rod 30202 to drive the arc hook 30203 to cooperate with the limiting slide groove 30201, combined with the hook-shaped structure of the anti-slip hook 30204, to achieve three-dimensional stable positioning. The arc-shaped connecting block 303 and the reverse connecting block 304 engage with each other on their curved surfaces, eliminating radial gaps and suppressing circumferential rotation through curved surface friction, further improving connection stability. Traditional devices generally use smooth inner wall insertion parts, relying only on single friction force for fixation, resulting in a small contact area and easy loosening due to vibration. The circumferential trapezoidal anti-slip groove 403 on the inner wall of the connecting ring 402 of this device adopts a sloping guide and rounded bottom design, which can accurately guide the terminal to embed and form a mechanical engagement and low-resistance contact during insertion; during disassembly, the anti-slip groove 403 elastically deforms and solidifies. It can now be decommissioned without damage and supports reuse. In terms of materials, the terminal body 1 is made of high conductivity copper alloy to ensure stable current transmission; the anti-reverse ring 2 is made of brass, which is high in strength and resistant to environmental corrosion; the connecting memory angle bar 30202 is made of nickel-titanium shape memory alloy, which utilizes its elastic deformation self-recovery characteristics to ensure the engagement of the arc hook 30203; the connecting arc 401 is made of phosphor bronze and other materials with high elastic modulus and yield strength, which distributes stress evenly and increases bending resistance and life; the connecting ring 402 is made of copper with hard silver plating on the inner wall, which significantly improves conductivity and wear resistance.

[0045] Working principle: Align the anti-loosening ring 2 with the top of the terminal body 1 and slide it downward along the axis. The connecting memory rod 30202 inside the anti-loosening ring 2 drives the arc hook 30203 to extend into the limiting groove 30201 simultaneously. When the arc hook 30203 slides to the end of the limiting groove 30201, the connecting memory rod 30202 generates radial elastic force due to deformation recovery, which locks the arc hook 30203 into the annular groove at the bottom of the groove. After the anti-loosening ring 2 is positioned without adhesive or additional clips, the connecting arc 401, which is fixedly connected to the top of the connecting ring 1 301, drives the connecting ring 2 402 to be exposed at the top of the anti-loosening ring 2. Its internal anti-slip groove 403 forms a toothed contact surface to enhance the mechanical engagement with the mating terminal. At the same time, the hook-shaped structure of the anti-slip hook 30204 directly hooks the micro-protrusion structure such as knurled pattern on the surface of the terminal body 1, further enhancing the axial anti-loosening performance of the anti-loosening ring 2 through mechanical engagement.

[0046] The connecting ring 301 engages with the reverse connecting block 304 inside the terminal body 1 via the arc-shaped connecting block 303, and achieves circumferential fixation by utilizing the friction of the arc surface. When the anti-reverse ring 2 falls back along the axial direction, the arc-shaped connecting block 303 and the reverse connecting block 304 fit together more tightly, eliminating radial gaps and ensuring a stable current conduction path.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A photovoltaic connector terminal, comprising a terminal body (1), characterized in that: The top of the terminal body (1) is slidably connected to a backstop ring (2), and a connecting mechanism (3) is provided inside the backstop ring (2). An insertion mechanism (4) is fixedly connected to the top of the connecting mechanism (3). The connecting mechanism (3) includes a connecting ring (301), the inside of which is connected to the inside of the anti-reverse ring (2). A limiting component (302) is provided on the top of the terminal body (1). The limiting component (302) includes a limiting groove (30201), which is opened on the top of the terminal body (1). Three arc hooks (30203) are slidably connected inside the limiting groove (30201).

2. A photovoltaic connector terminal according to claim 1, characterized in that: The insertion mechanism (4) includes a bottom of a connecting arc (401) fixedly connected to the top of a connecting ring one (301), and a connecting ring two (402) fixedly connected to the top of the connecting arc (401).

3. A photovoltaic connector terminal according to claim 2, characterized in that: The arc hook (30203) is externally fixedly connected to a connecting memory diagonal rod (30202), which is fixedly connected inside the anti-reverse ring (2).

4. A photovoltaic connector terminal according to claim 3, characterized in that: The bottom of the connecting memory diagonal bar (30202) is provided with multiple anti-slip hooks (30204), and the outside of the anti-slip hooks (30204) is provided with hook shape.

5. A photovoltaic connector terminal according to claim 4, characterized in that: The terminal body (1) is provided with an arc-shaped connecting block (303) inside, and the arc-shaped connecting block (303) is arc-shaped.

6. A photovoltaic connector terminal according to claim 5, characterized in that: The terminal body (1) has a reverse connection block (304) inside, and the reverse connection block (304) is an arc shape in the opposite direction.

7. A photovoltaic connector terminal according to claim 6, characterized in that: The reverse connecting block (304) and the arc-shaped connecting block (303) are engaged and connected to each other.

8. A photovoltaic connector terminal according to claim 2, characterized in that: The connecting ring 2 (402) has multiple anti-slip grooves (403) inside.

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