A terminal block which can be wired in layers

Abstract

A layered terminal block, comprising a terminal block seat, an insulating spacer plate and a copper plate. The side section of the terminal block seat is in a trapezoidal structure, and the inside is provided with a slidable insulating spacer plate. The copper plate is clamped between the two, and the cable terminal connector is connected with the copper plate through bolts and fixed in the terminal block seat. The side plate is fixed with the terminal block seat through the connecting hole and the bolt. The end face T-shaped sliding groove cooperates with the T-shaped sliding rail at the bottom of the insulating spacer plate to realize sliding limiting. The notch scale bar and the clamping screw hole are used for accurate positioning. The insulating spacer plate, the terminal block seat and the clamping groove of the side plate side and the clamping rail of the copper plate realize sliding insertion, and the fixing screw hole on the front and rear ear plates of the terminal block seat is used for installation and fixation. The terminal block saves installation space through layered design, is suitable for narrow position, and the cable enters and exits in the same direction, which is convenient for installation and maintenance. The copper plate connection and insulation isolation ensure the electrical reliability, and different specifications can be designed according to the load capacity.

Description

Technical Field

[0001] This utility model relates to the field of electrical connection technology, and in particular to a terminal block that can be wired in layers. Background Technology

[0002] Terminal blocks are core components in electrical systems for connecting lines and transmitting signals. They are widely used in substations, industrial automation control, and power cabinets. Their structural rationality directly affects equipment space utilization, wiring reliability, and maintenance convenience. With the increasing complexity of power systems and the growing integration of equipment, the need for layered layout, flexible adaptation, and safe insulation of terminal blocks is becoming increasingly urgent.

[0003] However, existing terminal blocks still have the following prominent problems in actual use: 1. Insulating spacers are mostly fixed to the base by bolts or welding, with fixed interlayer spacing, making them unsuitable for cables of different specifications or large components; the maintenance and operation space is narrow, and maintenance is difficult. At the same time, the planar layout easily leads to horizontal extension of the conductors, requiring a large amount of blank space to be reserved, wasting internal space and increasing manufacturing costs; 2. The copper busbar and the base are fixed by friction or a single bolt, which is easy to fall off during wiring / maintenance and requires repeated resetting; there is no standardized positioning for the connection between the cable and the copper busbar, which can easily lead to loose connection due to differences in operation, increasing the risk of failure; disconnection requires removing the bolts one by one, which is labor-intensive and prone to incorrect disconnection. 3. The wiring positions of terminal blocks from different manufacturers and batches are not uniform, there is no modular design, and it is inconvenient to check and verify the wiring of secondary circuits; there are no precise adjustment marks, and the adjustment of the insulating spacer relies on experience, which is prone to installation errors. 4. To ensure insulation, traditional terminal blocks either increase the spacing to compress the wiring space, or the compact design makes the insulating spacer plate easy to loosen and fall off, posing a safety hazard. Summary of the Invention

[0004] Given the technical problems existing in the background technology, the shortcomings of existing terminal blocks in terms of space utilization, adjustment flexibility, connection reliability and standardization make it difficult to meet the high-density, high-efficiency and high-safety wiring requirements of modern electrical systems. Therefore, it is of great significance to develop a terminal block structure that is layered and adjustable, has reliable connection and precise installation.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A terminal block that can be wired in layers includes a terminal block base, an insulating spacer, and a copper busbar. The side cross-section of the terminal block base is trapezoidal. A slidable insulating spacer is installed inside the terminal block base. A copper busbar is snapped between the insulating spacer and the terminal block base. The cable terminal connector is connected to the copper busbar by bolts and fixed inside the terminal block base.

[0006] In a preferred embodiment, a side plate is provided on the side of the terminal block base, and a connecting hole is provided on the side plate corresponding to the side of the terminal block base. A connecting bolt is threaded into the connecting hole to lock and fix the side plate and the terminal block base.

[0007] In a preferred embodiment, a T-shaped groove is provided parallel to the end face of the terminal block, and a T-shaped rail is provided at the bottom of the insulating spacer. The insulating spacer is engaged with the T-shaped groove via the T-shaped rail and slides along the T-shaped groove.

[0008] In a preferred embodiment, a copper busbar is snapped between the insulating spacer, the terminal block base, and the side plate. The copper busbar has bolt holes and is connected to the cable terminal by bolts.

[0009] In a preferred embodiment, the insulating spacer, terminal block base, and side plate are provided with corresponding slots, and the copper busbar is provided with corresponding rails on both sides, and the copper busbar is slidably inserted into the slots via the rails.

[0010] In a preferred embodiment, ear plates are vertically arranged on the front and rear sides of the terminal block, and fixing screw holes are provided on the ear plates.

[0011] In the preferred embodiment, graduated strips are equidistantly engraved at the opening of the T-shaped groove.

[0012] In the preferred embodiment, the T-shaped groove is provided with equidistant locking screw holes, and the locking screws are threaded into the locking screw holes to lock and fix the position of the insulating spacer.

[0013] A terminal block that allows for layered wiring, this patented technology can achieve the following beneficial effects in practical use: 1. The terminal block base adopts a trapezoidal side section structure, which is combined with the T-shaped slide rail at the bottom of the insulating spacer and the T-shaped slide groove of the terminal block base for sliding engagement. The position of the insulating spacer can be flexibly adjusted according to the cable specifications and component volume to change the interlayer distance, avoiding the limitation of the traditional fixed structure being "suitable for only one". By adjusting the spacing of the insulating spacers, the width of the installed copper busbars can be changed to accommodate various current intensities. Simultaneously, the layered layout replaces the traditional planar layout, reducing the blank area required for horizontal conductor extension, significantly saving internal space, reducing equipment size and manufacturing costs. During maintenance, the sliding spacers also provide ample operating space, reducing maintenance difficulty. 2. The insulating spacer, terminal block base, and side plate are slidably inserted into the copper busbar through slots and rails. With the help of standardized bolt holes on the copper busbar, the problem of copper busbar falling off caused by traditional "friction / single bolt fixing" is avoided. It also achieves precise positioning and connection between the cable terminal and the copper busbar, reducing the number of loose connections caused by operational differences. During disassembly and assembly, there is no need to remove bolts one by one. The operation can be completed simply by sliding the copper busbar or spacer, which greatly improves wiring and maintenance efficiency. 3. The scale strip on the T-shaped slide groove can intuitively guide the adjustment position of the insulating spacer. Together with the locking screw holes in the T-shaped slide groove, the position of the spacer can be precisely locked, avoiding the installation errors caused by traditional "experience adjustment" and ensuring compliance with relevant specifications. At the same time, the modular slot and rail structure makes the wiring position uniform in different batches and different scenarios, which facilitates secondary circuit wiring check and verification and improves the degree of standardization. 4. The insulating partition is fixed by a double limit of T-shaped slide rails and locking screw holes, avoiding the risk of partition loosening and falling off in traditional compact designs; and the layered layout achieves interlayer isolation through the insulating partition, without relying on "increasing the spacing" to ensure insulation, maximizing the use of wiring space while ensuring operational safety. Attached Figure Description The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is an anatomical diagram of the side plate structure of this utility model; Figure 3 This is a schematic diagram of the sliding structure of the insulating spacer of this utility model; Figure 4 This is a schematic diagram illustrating the installation effect of the copper busbar of this utility model; Figure 5 This is a schematic diagram illustrating the installation effect of the copper busbar of this utility model. Figure 2 ; Figure 6 This is a schematic diagram of the internal structure of the slide rail of this utility model.

[0014] In the diagram: Terminal block 1, ear plate 2, fixing screw hole 3, side plate 4, insulating spacer 5, copper busbar 6, connecting hole 7, connecting bolt 8, T-shaped slide groove 9, T-shaped slide rail 10, bolt hole 11, slot 12, rail 13, positioning screw hole 14, scale bar 15. Detailed Implementation

[0015] like Figure 1As shown, a terminal block capable of layered wiring includes a terminal block base 1, an insulating spacer 5, and a copper busbar 6. The terminal block base 1 is made of flame-retardant ABS insulating material, and its side cross-section is a trapezoidal structure that is wider at the top and narrower at the bottom. The upper base of the trapezoid is 20-30mm wide, and the lower base is 15-25mm wide. This structure can prevent the upper copper busbar 6 from obstructing the lower layer's operation when wiring, while also enhancing the overall load-bearing capacity of the terminal block base 1. A channel for sliding of the insulating spacer 5 is reserved along the length direction of the terminal block base 1. The inner wall of the channel is polished smooth to reduce sliding resistance. The sliding insulating spacer 5 is installed inside. The insulating spacer 5 is made of epoxy resin material with a thickness of 3-5mm and has good insulation and wear resistance. The insulating spacer 5 and the terminal block base 1 form a slot space for the copper busbar 6. The copper busbar 6 is made of copper and tin-plated for rust prevention. After the cable terminal connector (such as a crimp terminal) is aligned with the pre-set wiring hole of the copper busbar 6, it is connected by M4-M6 stainless steel bolts. The tightening torque of the bolts is controlled to ensure a firm contact and to avoid deformation of the copper busbar 6. Finally, the cable terminal and the copper busbar 6 are fixed together in the slot space in the terminal block base 1. This method is suitable for the layered wiring of 10-50A current lines in small and medium-sized electrical cabinets.

[0016] Preferred solutions include Figure 2 As shown, a side plate 4 is provided on the side of the terminal block base 1. The side plate 4 is made of the same material as the terminal block base 1 and can provide lateral protection for the copper busbar 6 and insulating spacer 5 inside the terminal block base 1, preventing external dust, debris from entering or accidental contact. The side plate 4 and the side of the terminal block base 1 are respectively provided with connecting holes 7. The diameter of the connecting holes is 4-6mm, and 2-4 are evenly distributed on each side. The connecting bolts 8 are made of galvanized carbon steel and are threaded into the connecting holes 7 of the terminal block base 1 after passing through the connecting holes 7 of the side plate 4. After tightening, the side plate 4 and the terminal block base 1 can be tightly locked and fixed. When it is necessary to remove the insulating spacer 5, the side plate 4 can be removed and the corresponding number of insulating spacers 5 can be removed.

[0017] Preferred solutions include Figure 3 As shown, a T-shaped groove 9 is provided parallel to the length direction on the end face of the terminal block 1. The groove 9 is 8-12mm wide and 10-15mm deep, and the groove wall is polished smooth. A T-shaped slide rail 10 is integrally formed on the bottom of the insulating spacer 5. The size of the T-shaped slide rail 10 matches the T-shaped groove 9 to ensure smooth sliding. During installation, the T-shaped slide rail 10 of the insulating spacer 5 is aligned with the T-shaped groove 9 of the terminal block 1, and pushed in along the length direction of the groove to achieve a snap-fit. The insulating spacer 5 can slide along the T-shaped groove 9 to achieve limited movement. During the sliding process, it will not shift left or right or fall off up or down, which makes it easy to adjust the spacing between adjacent insulating spacers 5 according to actual wiring requirements.

[0018] Preferred solutions include Figure 4As shown, an enclosed copper busbar installation space is formed between the insulating spacer 5, the terminal block seat 1, and the side plate 4. A copper busbar plate 6 is snapped into this space. Bolt holes 11 are provided along the length of the copper busbar plate 6. The diameter of the bolt holes 11 is 4.5-6.5mm. Sufficient distance is reserved between the edge of the hole and the edge of the copper busbar plate to avoid edge cracking. When wiring, the wiring hole of the cable terminal is aligned with the bolt hole 11 of the copper busbar plate 6, and fixed by M4-M6 hexagonal socket head cap screws. The bolts are used with spring washers to prevent loosening, so as to achieve a reliable connection between the cable terminal and the copper busbar plate 6. This solution is particularly suitable for scenarios that require parallel wiring of multiple sets of cables.

[0019] Preferred solutions include Figure 5 As shown, the insulating spacer 5, terminal block base 1, and side plate 4 are respectively provided with corresponding slots 12. The slots 12 are 5-8mm deep and 3-5mm wide, and the slot openings are rounded to facilitate the insertion of the slot rails. The two sides of the copper busbar 6 are integrally stamped to form slot rails 13. The height of the slot rails 13 matches the depth of the slots 12 and has a certain degree of elasticity to accommodate minor dimensional deviations. When installing the copper busbar 6, the slot rails 13 on both sides of the copper busbar 6 are aligned with the slots 12 of the corresponding components, and the assembly is completed by sliding them in the horizontal direction. No additional bolts are required for fixing, and the disassembly and assembly efficiency is significantly improved compared with the traditional structure. At the same time, the snap-fit ​​structure can limit the vertical and horizontal displacement of the copper busbar 6, ensuring the stability of the wiring.

[0020] Preferred solutions include Figure 1 As shown, ear plates 2 are vertically arranged on the front and rear sides of the terminal block base 1. The ear plates 2 are integrally formed vertically on the front and rear sides of the terminal block base 1. The ear plates 2 serve as a fixed support structure for the terminal block, with a thickness of 3-5mm and a width of 15-20mm. Fixing screw holes 3 are provided on the ear plates 2. The diameter of the fixing screw holes 3 is 5-7mm, and a safety distance is reserved between the center of the hole and the edge of the ear plate. When installing the terminal block, M5-M7 bolts are passed through the fixing screw holes 3 to fix the terminal block to the mounting bracket or back plate in the electrical cabinet. After the bolts are tightened, it can be ensured that the terminal block as a whole does not shake, which can adapt to the vibration environment during the operation of electrical equipment.

[0021] Preferred solutions include Figure 6 As shown, the T-shaped groove 9 has equidistant graduations 15 along its length at the groove opening. The graduations 15 are made using laser engraving technology, with the graduation unit being mm and the interval being 10 mm, featuring high clarity and wear resistance. The graduations 15 can intuitively display the sliding position of the insulating spacer 5, allowing operators to accurately adjust the spacing according to wiring requirements and avoiding errors caused by traditional adjustments based on experience.

[0022] Preferred solutions include Figure 6As shown, the T-shaped slide 9 has equidistant locking screw holes 14 along its length. The locking screw holes 14 are of size M3-M4, and the spacing between the holes is consistent with the interval of the scale strip 15. After the insulating spacer 5 is adjusted to the target position, the stainless steel locking screws are screwed into the corresponding locking screw holes 14 until the top of the screws is in close contact with the T-shaped slide rail 10 of the insulating spacer 5. This locks the insulating spacer 5 in place, preventing it from shifting due to vibration during terminal block use and ensuring the stability of the layered wiring structure.

[0023] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A terminal block capable of layered wiring, comprising a terminal block base (1), an insulating spacer (5), and a copper busbar (6), characterized in that: The side section of the terminal block (1) is trapezoidal. A sliding insulating spacer (5) is installed inside the terminal block (1). A copper busbar (6) is snapped between the insulating spacer (5) and the terminal block (1). The cable terminal connector is connected to the copper busbar (6) by bolts and fixed inside the terminal block (1).

2. The terminal block capable of layered wiring according to claim 1, characterized in that: A side plate (4) is provided on the side of the terminal block (1). The side plate (4) and the side of the terminal block (1) are respectively provided with connecting holes (7). The connecting bolt (8) is threadedly connected to the connecting hole (7) to lock and fix the side plate (4) and the terminal block (1).

3. The terminal block of claim 1, wherein: A T-shaped groove (9) is provided parallel to the end face of the terminal block (1), and a T-shaped rail (10) is provided at the bottom of the insulating spacer (5). The insulating spacer (5) is engaged with the T-shaped groove (9) through the T-shaped rail (10) and slides along the T-shaped groove (9) to achieve limited movement.

4. The terminal block capable of layered wiring according to claim 1, characterized in that: A copper busbar (6) is snapped between the insulating spacer (5), the terminal block seat (1), and the side plate (4). The copper busbar (6) has bolt holes (11) and is connected to the cable terminal by bolts.

5. The terminal block capable of layered wiring according to claim 4, characterized in that: The insulating spacer (5), terminal block seat (1) and side plate (4) are respectively provided with slots (12), and the copper busbar (6) is provided with rails (13) on both sides. The copper busbar (6) is slidably inserted into the slots (12) through the rails (13).

6. The terminal block capable of layered wiring according to claim 1, characterized in that: The terminal block (1) has ear plates (2) vertically arranged on its front and rear sides, and the ear plates (2) have fixing screw holes (3).

7. The terminal block capable of layered wiring according to claim 3, characterized in that: The T-shaped groove (9) has graduation strips (15) engraved at equal intervals at the groove opening.

8. The terminal block capable of layered wiring according to claim 3, characterized in that: The T-shaped groove (9) is provided with equidistant locking screw holes (14), and the locking screws are threaded into the locking screw holes (14) to lock and fix the position of the insulating spacer (5).

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