LFF terminal block

Abstract

This utility model discloses an LFF terminal block, including a first terminal block housing, with a second terminal block housing attached to the front of the first terminal block housing. This utility model employs a riveting structure between the first and second terminal block housings, significantly improving connection stability. The semi-circular placement groove, wiring bolts, support plate, and conductive plate work together to facilitate wiring operations, adapting to different specifications of copper lugs and offering strong versatility. A limiting part effectively restricts the wobbling of the conductive plate and support plate, further enhancing connection stability. The hinged protective cover can shield the copper lugs and wiring components when not in use, improving protection performance and extending service life. The extended protective cover in this device enhances protection. The overall structure achieves stable and reliable power connection, convenient installation and disassembly, and significantly improves the overall efficiency of the electrical connection. This device possesses the advantages of stable connection and ease of use.

Description

Technical Field

[0001] This utility model relates to the field of terminal block technology, specifically to LFF terminal blocks. Background Technology

[0002] In power transmission and electrical equipment connection processes, it is often necessary to reliably connect two cables. Currently, the common method is to crimp cable lugs to the cable ends separately and then connect the two lugs. However, this traditional lug connection method has several problems:

[0003] Welding Method: The two copper lugs are connected by welding. While welding can achieve a relatively strong connection, it requires a high level of skill from the operator, and the welding quality is inconsistent, prone to problems such as incomplete welds and false welds, affecting the reliability of the connection. Furthermore, the high temperatures generated during welding may damage the cable insulation layer, shortening the cable's lifespan. Additionally, the welded connection is difficult to disassemble, making later maintenance and repair extremely inconvenient. If a problem occurs, it often requires cutting and reconnecting the entire connection, resulting in material waste and increased maintenance costs.

[0004] Plug-in connection method: Some copper lugs are connected using a plug-in structure. However, this method has poor connection tightness. When subjected to external pulling or vibration, the copper lugs are prone to loosening or even detaching, which cannot guarantee the stability of power transmission. Moreover, the design of the plug-in structure is difficult to adapt to copper lugs of different specifications, resulting in poor versatility.

[0005] With the increasing demands of power systems for the stability, reliability, and ease of installation of electrical connections, the existing copper lug connection methods are no longer sufficient to meet actual needs. There is an urgent need for a device that can effectively solve the above problems and achieve a stable and convenient connection between two cable lugs. Utility Model Content

[0006] To address the problems mentioned in the background art, the purpose of this utility model is to provide an LFF terminal block that has the advantages of stable connection and ease of use.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an LFF terminal block, comprising a first terminal block housing, a second terminal block housing attached to the front of the first terminal block housing, and six mounting openings on the back of the first terminal block housing and the front of the second terminal block housing. A metal component is installed inside each mounting opening, and the metal component rivets and fixes the first terminal block housing and the second terminal block housing. Protective covers are hinged to both sides of the surface of the first terminal block housing, and the protective covers are hinged to the second terminal block housing. A semi-circular placement groove is provided inside both the first and second terminal block housings, and a wiring bolt is installed inside the semi-circular placement groove. A support plate is threaded onto the surface of the wiring bolt, and a conductive plate is provided on the surface of the wiring bolt. The conductive plate is attached to the support plate, and both the support plate and the conductive plate are attached to the first and second terminal block housings. A limiting part is provided inside both the first and second terminal block housings, and the bottom of the limiting part is attached to the top of the conductive plate. The limiting part can prevent the conductive plate and the support plate from shaking up and down.

[0008] As a preferred embodiment of this utility model, the surface of the wiring bolt is provided with an anti-loosening washer, and the surface of the wiring bolt is threaded with an anti-loosening nut, wherein the anti-loosening washer is in contact with the anti-loosening nut.

[0009] As a preferred embodiment of this utility model, the top of the protective cover is provided with a slot, and an identification bracket is engaged inside the slot.

[0010] As a preferred embodiment of the present invention, both the bottom of the first terminal housing and the second terminal housing are provided with mounting grooves. A mounting plate is fixedly connected to the inside of the mounting groove by screws. Compression springs are fixedly connected to the front and rear sides of the inside of the mounting plate. A locking frame is slidably connected to the inside of the mounting plate. The other end of the compression spring is fixedly connected to the locking frame. A locking block is provided on the surface of the mounting plate.

[0011] As a preferred embodiment of this utility model, the first terminal shell, the second terminal shell, and the protective cover are all made of plastic, and a gap is provided between the two protective covers.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model adopts a riveting structure between the first and second terminal shells, significantly improving connection stability and avoiding the risk of incomplete welding and loosening issues associated with traditional terminal shell connections. This indirectly ensures tight installation and stable conductivity of the cable lugs. The combination of the semi-circular placement groove, wiring bolts, support plate, and conductive plate makes wiring operations more convenient, adaptable to different specifications of lugs, and highly versatile. The limiting part effectively restricts the swaying of the conductive plate and support plate, further enhancing connection stability. The hinged protective cover can shield the lugs and wiring parts when not in use, preventing foreign object intrusion to a certain extent, improving protection performance, and extending service life. The extended protective cover in this device enhances the protective effect. The overall structure achieves stable and reliable power connection, convenient installation and disassembly, and solves many drawbacks of traditional connection methods, such as high-temperature damage from welding, loosening of plugs, and inconvenient maintenance. It meets the high requirements of power systems for connection stability, reliability, and ease of installation, significantly improving the overall efficiency of electrical connections, reducing later maintenance costs and failure rates. This device has the advantages of stable connection and ease of use.

[0014] 2. This utility model utilizes the anti-loosening washer and anti-loosening nut of the terminal bolt to form an anti-loosening mechanism, effectively preventing the anti-loosening nut from loosening in common vibration scenarios during power equipment operation. Under long-term vibration or external force, the anti-loosening structure ensures that the copper lug is always pressed and fixed between the conductive plate and the anti-loosening washer, maintaining stable conductivity and avoiding faults such as poor contact, increased resistance, or even open circuits caused by loosening. This design significantly improves the reliability of the terminal block under complex operating conditions, reduces maintenance frequency and costs, and is especially suitable for scenarios with frequent vibration, such as industrial equipment and rail transportation. Compared with traditional terminal blocks without anti-loosening design, its anti-loosening performance can effectively ensure the continuity and stability of power transmission, improve the overall safety of the electrical system, extend the service life of equipment, and provide a solid guarantee for high-reliability power connections. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the wiring bolt structure of this utility model;

[0017] Figure 3 This is a bottom view of the structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the first terminal shell of this utility model;

[0019] Figure 5 This is a schematic diagram of the protective cover structure of this utility model;

[0020] Figure 6This is a schematic diagram of the mounting plate structure of this utility model.

[0021] In the diagram: 1. First terminal housing; 2. Second terminal housing; 3. Mounting port; 4. Metal part; 5. Protective cover; 6. Semi-circular placement groove; 7. Wiring bolt; 8. Support plate; 9. Conductive plate; 10. Anti-loosening washer; 11. Anti-loosening nut; 12. Identifier frame; 13. Limiting part; 14. Mounting plate; 15. Locking frame; 16. Compression spring; 17. Locking block. Detailed Implementation

[0022] 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.

[0023] like Figures 1 to 6 As shown, the LFF terminal block includes a first terminal block housing 1, a second terminal block housing 2 attached to the front of the first terminal block housing 1, and mounting openings 3 on the back of the first terminal block housing 1 and the front of the second terminal block housing 2. There are six mounting openings 3 in total. Metal parts 4 are installed inside the mounting openings 3, and the metal parts 4 rivet and fix the first terminal block housing 1 and the second terminal block housing 2. Protective covers 5 are hinged to both sides of the surface of the first terminal block housing 1, and the protective covers 5 are hinged to the second terminal block housing 2. The interior of each of the two terminals is provided with a semi-circular placement groove 6. A wiring bolt 7 is provided inside the semi-circular placement groove 6. A support plate 8 is threadedly connected to the surface of the wiring bolt 7. A conductive plate 9 is provided on the surface of the wiring bolt 7. The conductive plate 9 is attached to the support plate 8. Both the support plate 8 and the conductive plate 9 are attached to the first terminal housing 1 and the second terminal housing 2. A limiting part 13 is provided inside the first terminal housing 1 and the second terminal housing 2. The bottom of the limiting part 13 is attached to the top of the conductive plate 9. The limiting part 13 can prevent the conductive plate 9 and the support plate 8 from shaking up and down.

[0024] refer to Figure 2 The surface of the wiring bolt 7 is provided with an anti-loosening washer 10, and the surface of the wiring bolt 7 is threaded with an anti-loosening nut 11, with the anti-loosening washer 10 and the anti-loosening nut 11 fitting together.

[0025] As a technical optimization of this utility model, the anti-loosening mechanism is formed by the cooperation of the anti-loosening washer 10 and the anti-loosening nut 11 of the terminal bolt 7. This effectively prevents the anti-loosening nut 11 from loosening, addressing common vibration scenarios in power equipment operation. Under long-term vibration or external force, the anti-loosening structure ensures that the copper lug is always pressed and fixed between the conductive plate 9 and the anti-loosening washer 10, maintaining stable conductivity and avoiding faults such as poor contact, increased resistance, or even open circuits caused by loosening. This design significantly improves the reliability of the terminal block under complex operating conditions, reduces maintenance frequency and costs, and is particularly suitable for scenarios with frequent vibration, such as industrial equipment and rail transportation. Compared with traditional terminal blocks without anti-loosening design, its anti-loosening performance effectively ensures the continuity and stability of power transmission, improves the overall safety of the electrical system, extends equipment lifespan, and provides a solid guarantee for high-reliability power connections.

[0026] refer to Figure 1 The top of the protective cover 5 is provided with a slot, and the inside of the slot is fitted with an identification bracket 12.

[0027] As a technical optimization of this utility model, the design of the protective cover 5 with slots and the label holder 12 provides convenient labeling and management functions for the wiring terminals. In electrical systems with multiple terminals installed in parallel, the label holder 12 can clearly mark the purpose of each terminal, such as voltage level, cable number, and connected equipment, greatly improving maintenance and repair efficiency. The label holder 12 is connected by slots, making installation and removal flexible. The label content can be quickly changed according to actual needs, avoiding the fragility and blurring problems of traditional labeling methods such as handwriting and stickers. This design makes the electrical connection system clearer and more orderly, reducing human error, such as incorrect wiring or incorrect repair. Especially in complex power distribution systems and control cabinets, it significantly improves management convenience and operational accuracy, reduces troubleshooting time and costs, and enhances the maintainability and intelligent management level of the system.

[0028] refer to Figure 6 The bottom of the first terminal housing 1 and the second terminal housing 2 are both provided with mounting grooves. The mounting plate 14 is fixedly connected to the inside of the mounting groove by screws. The front and rear sides of the mounting plate 14 are fixedly connected to the inside. The locking frame 15 is slidably connected to the inside of the mounting plate 14. The other end of the compression spring 16 is fixedly connected to the locking frame 15. The surface of the mounting plate 14 is provided with a locking block 17.

[0029] As a technical optimization of this utility model, the quick installation and secure locking of the terminal block are achieved through the mounting groove, mounting plate 14, compression spring 16, locking frame 15, and locking block 17. During installation, the compression spring 16 drives the locking frame 15 to cooperate with the locking block 17, which can be fixed without complicated tools, improving installation efficiency. The elastic force of the compression spring 16 ensures that the locking frame 15 remains tightly fitted under vibration, preventing terminal displacement and ensuring the stability of the internal connection structure. This design is suitable for various installation scenarios, such as DIN rail installation, and has strong versatility. The locking structure can effectively resist external impacts and avoid internal connection failures caused by loose installation. Compared with traditional bolt fixing or snap-fit ​​connection, it is easier to install and more reliable to lock, reducing installation time and subsequent maintenance risks, improving the practicality and adaptability of the product on the engineering site, and providing strong support for the rapid deployment and stable operation of electrical equipment. The surface of the compression spring 16 is coated with anti-rust paint to prevent the compression spring 16 from being corroded. The compression spring 16 pushes the locking frame 15 to move to the right, so that the locking frame 15 is always close to the locking block 17. The locking frame 15 and the locking block 17 cooperate to be installed with an external guide rail. The external guide rail is not shown. The external guide rail is a common existing technology and will not be described in detail in this application.

[0030] refer to Figure 1 The first terminal housing 1, the second terminal housing 2, and the protective cover 5 are all made of plastic, and there is a gap between the two protective covers 5.

[0031] As a technical optimization of this utility model, the use of plastic material to manufacture the first terminal housing 1, the second terminal housing 2, and the protective cover 5 provides excellent insulation performance, effectively avoiding the risk of electrical short circuits and improving safety, especially suitable for high-voltage, multi-circuit electrical systems. The plastic material also possesses corrosion resistance and aging resistance, adapting to harsh environments such as humidity and dust, extending product lifespan. The gap design between the protective covers 5 provides ample space for wiring operations; the protective covers 5 can be locked in place after rotating around the axis, facilitating wiring. The gap between the two protective covers 5 prevents them from touching each other after rotating 90 degrees, improving installation convenience. Furthermore, the gap helps dissipate internal heat, preventing overheating due to prolonged operation and avoiding degradation of insulation performance or accelerated component aging. This design ensures insulation safety while balancing operational convenience and heat dissipation requirements, making the terminal blocks safer and more durable in actual use, reducing the risk of failure due to material aging or overheating, and improving user experience and overall product performance.

[0032] The working principle and usage process of this utility model are as follows: During production and installation, the operator first threads the wiring bolt 7 to the support plate 8, then places the conductive plate 9 over the surface of the wiring bolt 7 from top to bottom, ensuring the conductive plate 9 fits snugly against the support plate 8. Next, the wiring screw, support plate 8, and conductive plate 9 are inserted into the first terminal housing 1 from front to back. The insertion state is shown in the attached figure. Figure 2 As shown, the wiring bolt 7 is placed in the semi-circular placement groove 6. Then, the second wiring terminal shell 2 is aligned and fitted with the first wiring terminal shell 1 from front to back. Then, the first wiring terminal shell 1 and the second wiring terminal shell 2 are firmly riveted together by the metal part 4. Since the limiting part 13 in the first wiring terminal shell 1 and the second wiring terminal shell 2 can prevent the conductive plate 9 and the support plate 8 from moving up and down, and the wiring bolt 7 is threadedly connected to the support plate 8, the support plate 8 cannot move up and down, left and right or forward and backward under the joint limiting action of the first wiring terminal shell 1 and the second wiring terminal shell 2. At this time, the wiring bolt 7 cannot move up and down either. Therefore, the wiring bolt 7 cannot be rotated through multi-dimensional cooperation. Thus, when the operator rotates the anti-loosening nut 11, the wiring bolt 7 will not rotate, which makes it easier for the operator to press and fix the copper lug.

[0033] When the operator needs to connect two copper lugs, the operator flips the two protective covers 5 ninety degrees, and then puts the round hole of the copper lug onto the surface of the wiring bolt 7 from top to bottom, so that the copper lug is in contact with the conductive plate 9. Then, the anti-loosening washer 10 is put onto the surface of the wiring bolt 7 from top to bottom until the anti-loosening washer 10 is in contact with the copper lug. Then, the anti-loosening nut 11 is threaded onto the wiring bolt 7, so that the anti-loosening nut 11 moves down, thereby pressing down the anti-loosening washer 10, and thus pressing the copper lug, so that the copper lug is in close contact with the conductive plate 9. Through the conductivity of the conductive plate 9, power can be transmitted between the cables connected to the two copper lugs.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. LFF terminal block comprising a first terminal block housing (1), characterized in that: The first terminal housing (1) has a second terminal housing (2) attached to its front side. The back of the first terminal housing (1) and the front of the second terminal housing (2) both have mounting openings (3). There are six mounting openings (3). A metal part (4) is installed inside each mounting opening (3). The metal part (4) rivets and fixes the first terminal housing (1) and the second terminal housing (2). Protective covers (5) are hinged to both sides of the surface of the first terminal housing (1). The protective covers (5) are hinged to the second terminal housing (2). Semi-circular placement grooves are provided inside both the first terminal housing (1) and the second terminal housing (2). 6) A wiring bolt (7) is provided inside the semi-circular placement groove (6). A support plate (8) is threadedly connected to the surface of the wiring bolt (7). A conductive plate (9) is provided on the surface of the wiring bolt (7). The conductive plate (9) is attached to the support plate (8). Both the support plate (8) and the conductive plate (9) are attached to the first terminal shell (1) and the second terminal shell (2). A limiting part (13) is provided inside the first terminal shell (1) and the second terminal shell (2). The bottom of the limiting part (13) is attached to the top of the conductive plate (9). The limiting part (13) can prevent the conductive plate (9) and the support plate (8) from shaking up and down.

2. The LFF terminal of claim 1, wherein: The surface of the wiring bolt (7) is provided with an anti-loosening washer (10), and the surface of the wiring bolt (7) is threaded with an anti-loosening nut (11), and the anti-loosening washer (10) and the anti-loosening nut (11) are in contact.

3. The LFF terminal of claim 1, wherein: The top of the protective cover (5) is provided with a slot, and an identification bracket (12) is engaged inside the slot.

4. The LFF terminal of claim 1, wherein: The bottom of the first terminal housing (1) and the second terminal housing (2) are provided with mounting grooves. The mounting grooves are fixedly connected to the mounting plate (14) by screws. The front and rear sides of the mounting plate (14) are fixedly connected to the mounting plate (14). The mounting plate (14) is slidably connected to the mounting frame (15). The other end of the compression spring (16) is fixedly connected to the locking frame (15). The surface of the mounting plate (14) is provided with a locking block (17).

5. The LFF terminal of claim 1, wherein: The first terminal housing (1), the second terminal housing (2), and the protective cover (5) are all made of plastic, and there is a gap between the two protective covers (5).

Images