A thread-adjustable, variable-pitch wiring terminal for wiring

Abstract

The present invention relates to the technical field of electronic components, and discloses a thread-adjustable, variable-pitch wiring terminal for wiring, comprising a base, one side of the base being fixedly connected to a support sleeve, and the base being fixedly connected to a housing 2 via a slide groove provided therein. The thread-adjustable, variable-pitch wiring terminal for wiring can effectively solve the problem in the prior art that most terminal blocks on the market adopt a fixed-pitch design, while in large industrial electrical equipment, especially in high-voltage or high-current scenarios, thicker-diameter wires are often required to carry higher energy. The national electrical standards have clear provisions on terminal spacing, and the spacing between the power posts of electrical equipment of different specifications is also different. The fixed-pitch terminal block cannot be flexibly adjusted according to the actual wire specifications and the spacing between the power posts of the electrical equipment, resulting in a mismatch between the wires and the terminal block in actual applications.

Description

Technical Field

[0001] The invention relates to the technical field of electronic components, and in particular to a thread-adjustable spacing variable wiring terminal for wiring. Background Art

[0002] In electrical systems, terminal blocks are the core components for achieving reliable connections between wires and equipment, and between wires. With the development of industrial intelligence and new energy technologies, the complexity and integration of electrical systems are constantly improving, which places higher demands on the compatibility, safety and flexibility of terminal blocks.

[0003] In the existing technology, most terminal blocks on the market adopt a fixed-pitch design. However, in large-scale industrial electrical equipment, especially in high-voltage or high-current scenarios, thicker diameter wires are often required to carry higher energy. The national electrical standards have clear provisions on terminal spacing, and the spacing between the terminal posts of electrical equipment of different specifications is also different. The fixed-pitch terminal blocks cannot be flexibly adjusted according to the actual wire specifications and the spacing between the terminal posts of the electrical equipment, resulting in a mismatch between the wires and the terminal blocks in actual applications. Summary of the Invention

[0004] In response to the above-mentioned shortcomings of the prior art, the present invention provides a thread-adjustable variable-pitch terminal block for wiring, which can effectively solve the problem in the prior art that most terminal blocks on the market adopt a fixed-pitch design, while in large-scale industrial electrical equipment, especially in high-voltage or high-current scenarios, it is often necessary to use thicker diameter wires to carry higher energy. The national electrical standards have clear provisions on terminal spacing, and the spacing between the power posts of electrical equipment of different specifications is also different. The fixed-pitch terminal block cannot be flexibly adjusted according to the actual wire specifications and the spacing between the power posts of the electrical equipment, resulting in the problem of mismatch between the wires and the terminal block in actual applications.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] The present invention provides a thread-adjustable, pitch-variable wiring terminal for wiring, comprising:

[0007] A base, one side of the base is fixedly connected to a support sleeve, the base is fixedly connected to a shell body 2 via a slide groove provided in the base, a side of the shell body 2 close to the support sleeve is provided with a shell body 1 slidably connected to the inside of the slide groove, a side of the shell body 2 away from the shell body 1 is provided with a shell body 3 sliding with the inside of the slide groove, a plurality of shell bodies 3 are provided, an adjusting member for adjusting the distance between the shell body 1, the shell body 2 and the shell body 3 is provided inside the slide groove, and special-shaped grooves are provided inside the shell body 1, the shell body 2 and the shell body 3, and a wiring assembly is provided inside the special-shaped groove;

[0008] In which, the adjusting part includes a connecting rod, and the connecting rod is provided with several groups, each group of the connecting rods is provided with two connecting rods, and the two connecting rods are cross-distributed, and the lower surfaces of the shell one, shell two and shell three are fixedly connected with a rotating shaft, and the middle parts of adjacent connecting rods are rotatably connected by a rotating shaft, and the inside of the support sleeve is rotatably connected with a screw rod, and the outer end of the screw rod passes through the shell one and is rotatably connected to the outer surface of the shell two.

[0009] Furthermore, the wiring assembly includes a conductive frame embedded in the special-shaped groove, an insulating frame slidably connected to the outer surface of the conductive frame is provided inside the special-shaped groove, two insulating frames are provided and symmetrically distributed on the left and right sides of the conductive frame, a through hole is provided on one side of the conductive frame, a piezoelectric sheet is fixedly connected to the top of the conductive frame, a connecting column is fixedly connected to the side of the conductive frame away from the through hole, and a movable part for changing the position of the insulating frame is provided at the bottom of the inner wall of the special-shaped groove.

[0010] Furthermore, the moving part includes a gear rotatably connected to the bottom of the inner wall of the special-shaped groove, and a gear rod is fixedly connected to the lower surface of the insulating frame. There are two gear rods and they are distributed in a circumferential array along the central axis of the gear.

[0011] Furthermore, the lower surface of the gear rod is provided with a sliding rod that is slidably connected to the bottom of the inner wall of the special-shaped groove. The side of the sliding rod close to the gear is provided with a tooth groove, and the side of the sliding rod away from the gear is provided with a ratchet. The special-shaped groove is rotatably connected to a ratchet through a fixed shaft provided at the bottom of its inner wall.

[0012] Furthermore, the outer surface of the fixed shaft is sleeved with a torsion spring connected to the inside of the pawl, and the bottom of the inner wall of the special-shaped groove is fixedly connected to a limit block that fits the outer surface of the pawl. Under the action of the torsion spring, the pawl fits the outer surface of the limit block.

[0013] Furthermore, one end of the pawl away from the sliding rod is rotatably connected to a connecting rod, and the connecting rod is connected to the bottom of the inner wall of the special-shaped groove in a damping sliding manner.

[0014] Furthermore, the internal thread of the conductive frame is connected to a screw rod that fits the outer surface of the piezoelectric piece, and the side of the insulating frame close to the conductive frame is fixedly connected to a pressing block.

[0015] Furthermore, an elastic sheet is fixedly connected to one side of the pressing block close to the conductive frame, and a dimension line is provided on the upper surface of the base 1 .

[0016] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0017] The present invention is provided with a shell 1, a shell 2, a shell 3, an adjustment member and a base. The shell 1, the shell 2 and the multiple shells 3 adopt the same structural design. The screw rod passes through the shell 1 and is rotatably connected to the fixed outer surface of the shell 2 to achieve the adjustment of the distance between the shell 1 and the shell 2. The shell 1, the shell 2 and the multiple shells 3 are fixedly connected to the lower surface of the shell 1 and the shell 2 and are rotatably connected to the connecting rod to form a parallelogram mechanism, thereby achieving equal spacing between adjacent shells 1, 2 and the multiple shells 3, ensuring synchronous and equidistant adjustment of multiple groups of terminals, and avoiding stress concentration or installation interference caused by uneven spacing. Therefore, it can adapt to wires of different specifications (cross-sectional area, voltage, current) in electrical equipment, flexibly match wires and terminal posts in different electrical equipment, strictly comply with national electrical standards, avoid arc discharge, creepage and other accidents caused by insufficient spacing, and is particularly suitable for high voltage and high current scenarios. It can expand the spacing according to the outer diameter of the thick wire insulation to avoid squeezing or contact of the insulation layer between adjacent terminals, reduce the risk of short circuit, and improve the reliability of insulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0019] Figure 1 Schematic diagram of the three-dimensional structure of an embodiment of the present invention;

[0020] Figure 2 Schematic diagram of the cross-sectional structure of a base according to an embodiment of the present invention;

[0021] Figure 3 This is a structural schematic diagram of the adjusting member, housing 1, housing 2, and housing 3 from another angle according to an embodiment of the present invention;

[0022] Figure 4 This is a schematic structural diagram of a special-shaped slot, a conductive frame, and an insulating frame according to an embodiment of the present invention;

[0023] Figure 5 This is a schematic structural diagram of the rack rod, gear, conductive frame and insulating frame from another angle according to an embodiment of the present invention;

[0024] Figure 6 Schematic diagram of the separation structure of the wiring assembly according to an embodiment of the present invention;

[0025] Figure 7 This is a schematic structural diagram of a moving part and a special-shaped groove according to an embodiment of the present invention;

[0026] Figure 8 For the embodiment of the present invention Figure 7 A schematic diagram of the partially enlarged structure at point A in the middle;

[0027] Figure 9 This is a schematic structural diagram of a torsion spring, a limit block, a pawl, and a connecting rod according to an embodiment of the present invention;

[0028] Figure 10 Schematic diagram of the structure of the insulating frame and the gear rod according to an embodiment of the present invention.

[0029] The numbers in the figure represent: 1. base; 11. support sleeve; 12. slide groove; 13. adjusting part; 131. connecting rod; 132. rotating shaft; 133. screw rod; 21. shell one; 211. special-shaped groove; 22. shell two; 23. shell three; 24. wiring assembly; 241. conductive frame; 2411. through hole; 242. insulating frame; 2421. pressure block; 2422. elastic sheet; 243. piezoelectric sheet; 244. connecting column; 245. screw; 25. moving part; 251. gear; 252. gear rod; 253. slide rod; 2531. tooth groove; 2532. ratchet; 254. pawl; 255. torsion spring; 256. limit block; 257. connecting rod. DETAILED DESCRIPTION

[0030] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0031] The present invention will be further described below with reference to the embodiments.

[0032] Example:

[0033] See also Figures 1-10 The present invention provides a technical solution: a thread-adjustable variable-pitch wiring terminal for wiring, comprising:

[0034] Base 1, one side of the base 1 is fixedly connected to the support sleeve 11, and the base 1 is fixedly connected to the shell 2 22 through the slide groove 12 opened inside it. The side of the shell 2 22 close to the support sleeve 11 is provided with a shell 1 21 that is slidably connected to the inside of the slide groove 12, and the side of the shell 2 22 away from the shell 1 21 is provided with a shell 3 23 that slides with the inside of the slide groove 12. There are multiple shells 3 23 and they are distributed in an array along the left and right directions. The inside of the slide groove 12 is provided with an adjusting part 13 for adjusting the distance between the shell 1 21, the shell 2 22 and the shell 3 23. The inside of the shell 1 21, the shell 2 22 and the shell 3 23 are all provided with special-shaped grooves 211, and the inside of the special-shaped groove 211 is provided with a wiring assembly 24. The shell 1 21, the shell 2 22 and the shell 3 23 all adopt the same structural design.

[0035] Among them, the adjusting member 13 includes a connecting rod 131, and the connecting rod 131 is provided with several groups, each group of connecting rods 131 is provided with two, and the two connecting rods 131 are cross-distributed. The lower surfaces of shell 1 21, shell 2 22 and shell 3 23 are fixedly connected with a rotating shaft 132, and the middle parts of adjacent connecting rods 131 are rotatably connected by the rotating shaft 132. The inside of the support sleeve 11 is rotatably connected with a screw rod 133, and the outer end of the screw rod 133 passes through shell 1 21 and is rotatably connected to the outer surface of shell 2 22.

[0036] The wiring assembly 24 includes a conductive frame 241 embedded in the special-shaped groove 211. The special-shaped groove 211 is provided with an insulating frame 242 that is slidably connected to the outer surface of the conductive frame 241. Two insulating frames 242 are provided and are symmetrically distributed on the left and right sides of the conductive frame 241. A through hole 2411 is provided on one side of the conductive frame 241. A piezoelectric piece 243 is fixedly connected to the top of the conductive frame 241. A connecting column 244 is fixedly connected to the side of the conductive frame 241 away from the through hole 2411. A moving part 25 for changing the position of the insulating frame 242 is provided at the bottom of the inner wall of the special-shaped groove 211.

[0037] The moving member 25 includes a gear 251 rotatably connected to the bottom of the inner wall of the special-shaped groove 211 . A gear rod 252 is fixedly connected to the lower surface of the insulating frame 242 . Two gear rods 252 are provided and distributed in a circular array along the central axis of the gear 251 .

[0038] The lower surface of the gear rod 252 is provided with a sliding rod 253 that is slidably connected to the bottom of the inner wall of the special-shaped groove 211. A tooth groove 2531 is provided on the side of the sliding rod 253 close to the gear 251, and a ratchet 2532 is provided on the side of the sliding rod 253 away from the gear 251. The special-shaped groove 211 is rotatably connected to the pawl 254 through a fixed axis set at the bottom of its inner wall.

[0039] The outer surface of the fixed shaft is sleeved with a torsion spring 255 connected to the inside of the pawl 254, and the bottom of the inner wall of the special-shaped groove 211 is fixedly connected with a limit block 256 that fits the outer surface of the pawl 254. Under the action of the torsion spring 255, the pawl 254 fits the outer surface of the limit block 256.

[0040] One end of the pawl 254 away from the slide rod 253 is rotatably connected to the connecting rod 257 , and the connecting rod 257 is connected to the bottom of the inner wall of the special-shaped groove 211 in a damping sliding manner.

[0041] The internal thread of the conductive frame 241 is connected to a screw rod 245 that fits the outer surface of the piezoelectric piece 243 . The side of the insulating frame 242 close to the conductive frame 241 is fixedly connected to a pressing block 2421 .

[0042] An elastic sheet 2422 is fixedly connected to the side of the pressing block 2421 close to the conductive frame 241. A dimension line is also provided on the upper surface of the base 1. The position of the connecting column 244 in the shell 22 is the starting point, and the dimension line extends toward the position of the shell 1 21, which can facilitate the user to quickly adjust the distance between two adjacent connecting columns 244.

[0043] The process of adjusting the distance between two adjacent terminal blocks:

[0044] Terminal blocks are used for wiring in electrical equipment. Since the wires in electrical equipment come in a variety of diameters and the national electrical standards have clear provisions on terminal spacing, the wire cross-sectional area, voltage level, and current load must be considered simultaneously. In high-voltage or high-current scenarios, thicker wires carry higher energy. If the terminal spacing is insufficient, arc discharge or creepage may cause accidents. Therefore, the distance between the power posts of electrical equipment of different specifications may vary. In order to meet diverse needs, the terminal blocks in this application adopt an adjustable spacing design.

[0045] In actual application, adjustments are made according to the distance between the terminals in the corresponding terminal blocks so that the distance between two adjacent connecting columns 244 in this application is equal to the distance between the terminals in the corresponding terminal blocks. The screw rod 133 is turned, and the circumferential outer surface of the outer end of the screw rod 133 fits with the inner wall surface of the support sleeve 11. The circumferential outer surface of the middle part of the screw rod 133 is threadedly connected to the interior of the shell 1 21. The end of the screw rod 133 away from the support sleeve 11 is rotatably connected to the side of the shell 2 22 close to the shell 1 21. After rotating the screw rod 133, the shell 1 21 engages with the outer surface of the screw rod 133 and slides left and right inside the slide groove 12 opened on the upper surface of the base 1. A dimension line is also provided on the upper surface of the base 1. The position of the connecting column 244 in the shell 2 22 is the starting point, and the dimension line extends to the position of the shell 1 21, which can facilitate the user to quickly adjust the distance between two adjacent connecting columns 244.

[0046] The middle lower surfaces of housing 1 21, housing 2 22, and housing 3 23 are all fixedly connected to a rotating shaft 132. Two connecting rods 131 are axially connected to the exterior of the rotating shaft 132. The two connecting rods 131 are staggered, and several groups of connecting rods 131 and the rotating shaft 132 form a parallelogram structure. When the position of housing 1 21 is adjusted by rotating the screw 133, since housing 2 22 is fixed, the distance between housing 1 21 and housing 2 22 changes, that is, the distance between the corresponding connecting posts 244 on the lower surfaces of housing 1 21 and housing 2 22 changes. Correspondingly, the distance between housing 2 22 and the first housing 3 23 in the direction closest to the support sleeve 11 changes, and the distance between housing 3 23 and the adjacent housing 3 23 changes. At this time, the distances between the rotating shafts 132 on the lower surfaces of housing 1 21, housing 2 22, and multiple housing 3 23 are the same, and the distances between the multiple connecting posts 244 are also the same. When the distance between the corresponding connecting columns 244 of shell 1 21 and shell 2 22 meets the corresponding terminal block, the screw rod 133 stops rotating. The screw rod 133 is a self-locking screw rod 133 and will not rotate without external force. Shell 1 21, shell 2 22 and multiple shells 3 23 all adopt the same structural design.

[0047] Procedure for inserting and clamping external wires:

[0048] The wires in the corresponding electrical equipment are connected to the wiring assembly 24 inside the special-shaped groove 211. The space enclosed by the two symmetrical insulating frames 242, the conductive frame 241, and the side of the piezoelectric plate 243 away from the through hole 2411 is a placement cavity. The thickness of the gear 251 is greater than the thickness of the toothed rod 252 plus the slide bar 253. The lower surface of the toothed rod 252 is in contact with the upper surface of the slide bar 253. The inner wall surface of the special-shaped groove 211 of the housing 1 21, the housing 2 22, and the housing 3 23 are all provided with limit strips to allow the insulating frame 242 to slide horizontally left and right inside the special-shaped groove 211. The lower surface of the insulating frame 242 is fixedly connected to the upper surface of the toothed rod 252, so that the toothed rod 252 is also horizontally slidable left and right inside the special-shaped groove 211. The gear 251 is rotatably connected at the middle position of the bottom of the inner wall of the special-shaped groove 211. The connecting rod 257 and the slide bar 253 slide horizontally back and forth with the bottom of the inner wall of the special-shaped groove 211 via the slide strip.

[0049] Taking the case 1 21 as an example, a single rigid wire is inserted from the top of the irregularly shaped slot 211 into the placement cavity. The outer surfaces of the connecting rod 257 and the sliding rod 253, facing away from the piezoelectric plate 243, are nearly parallel to the outer surface of the case 1 21. Initially, the two insulating frames 242 are relatively far apart, and correspondingly, the two gear rods 252 are relatively far apart. After the wire is placed, the sliding rod 253 is slid horizontally in the front-to-back direction within the irregularly shaped slot 211 using a tool such as a screwdriver. During this movement, the teeth 2531 on the outer surface of the sliding rod 253 constantly mesh with the outer surface of the gear 251, causing the gear 251 to rotate clockwise around its axis under the action of the sliding rod 253.

[0050] As the slide bar 253 moves, the ratchet teeth 2532 on its other side engage with the pawl 254. Each time the slide bar 253 moves forward, the pawl 254 rotates counterclockwise around its central fixed axis by a certain angle. Under the action of the torsion spring 255, the pawl 254 returns to its original position until the outer surface of the pawl 254 contacts the outer surface of the stop block 256. Because the gear 251 has two gear rods 252 in the circular arrays on both the front and rear sides, and the adjacent surfaces of the two gear rods 252 mesh with the outer surface of the gear 251, when the gear 251 rotates clockwise, the left gear rod 252 drives the left insulating frame 242 to slide horizontally to the right, and the right gear rod 252 drives the right insulating frame 242 to slide horizontally to the left, gradually closing the distance between the two insulating frames 242.

[0051] During this process, the pressing block 2421, which is fixedly connected to the inner wall surface of the insulating frame 242, also moves synchronously until the elastic pieces 2422 on both sides simultaneously contact the outer surface of the wire inside the cavity. After the slide bar 253 is pushed forward a certain distance, the multiple elastic pieces 2422 on both sides undergo elastic deformation, and the slide bar 253 cannot move forward any further. Because the pawl 254 and the ratchet teeth 2532 cooperate with each other in a unidirectional manner, the elastic pieces 2422 on both sides and the pressing block 2421 stably clamp the external wire. The end of the pawl 254 away from the gear 251 is hollow, and the end of the connecting rod 257 near the pawl 254 is also hollow, so the two can be connected in relative rotation. During this process, the connecting rod 257 is not affected by the rotation of the pawl 254.

[0052] Currently, the piezoelectric plate 243 in most screw-type terminals only applies a clamping force to the wire in the vertical direction. This clamping force is perpendicular to the wire axis and only constrains movement within the vertical plane. There is no direct horizontal constraint. Since the width of the conductive plate is greater than the wire diameter, if the wire is subjected to horizontal forces such as pulling or vibration, the wire may shift within the horizontal gap, affecting the stability of the electrical connection. The vertical clamping force generates a positive pressure perpendicular to the contact surface, creating friction (directed parallel to the contact surface). However, this friction primarily constrains the wire from sliding within the vertical plane (up and down, forward and backward movement). The horizontal friction, lacking a positive pressure, cannot effectively limit lateral deviation (left and right) of the wire. Wire deviation reduces the contact area between the piezoelectric plate 243 and the core wire, increasing contact resistance. This can cause overheating, localized excessive temperature rise, and even terminal burnout. In a vibrating environment, sustained horizontal deviation can loosen the mechanical connection between the wire and the terminal, potentially leading to wire breakage or short circuit failures. When the wire diameter is smaller than the width of the piezoelectric plate 243, horizontal offset is a potential risk for terminals clamped in a single direction. This is essentially due to the lack of mechanical stability caused by the single direction of the restraining force and the gap. However, the movable member 25 can clamp the wire in both left and right directions, flexibly accommodating wires of varying diameters within a certain range while also eliminating lateral offset and preventing loosening, ensuring a stable and secure connection.

[0053] After being stably clamped in the left and right directions, the screw 245 is inserted from the outside of the housing 21 into the inside of the special-shaped groove 211. After the outer end of the screw 245 passes through the through hole 2411 and contacts the outer surface of the piezoelectric plate 243, it drives the piezoelectric plate 243 to approach the outer surface of the external wire. The screw 245 is tightened so that the wire is also stably constrained in the vertical and parallel direction. At this time, the wire is firmly clamped in the left and right directions and the front and back directions, which reduces the possibility of the wire loosening due to external vibration or tilting during subsequent use. The diameter of the wire with the smallest diameter that can be accommodated in the placement groove is greater than the inner wall surface of the conductive frame 241 on the side close to the connecting column 244, and the distance to the outer surface of the pressure block 2421 on the side away from the connecting column 244 can ensure that the piezoelectric plate 243 can stably clamp it in the front and back directions. A groove is provided on the surface of the pressure block 2421 on the side close to the piezoelectric plate 243. Since the housing 1 21 , the housing 2 22 and the housing 3 23 adopt the same structural design, the remaining wires can also be connected to the housing 2 22 and the housing 3 23 using the above method.

[0054] The process of removing the wires:

[0055] When inspecting or changing the wiring, the wires need to be removed from the interior of the single shaped slot 211. Twist the screw 245 outward, causing the piezoelectric plate 243 to rebound toward the side of the through-hole 2411, initially releasing the front-to-back pressure on the external wires. Pull the connecting rod 257 outward from the side near the connecting column 244. As the connecting rod 257 moves toward the connecting column 244, the hollow inner wall of the outer end of the connecting rod 257 contacts the hollow inner wall of the pawl 254, driving the pawl 254 to rotate counterclockwise around its fixed axis, causing the outer surface of the pawl 254 to disengage from the ratchet teeth 2532 on the outer side of the slide bar 253. At this point, the slide bar 253 is controlled by the pawl 254, releasing its unidirectionality. After the restriction is removed, the symmetrically distributed insulating frame 242, gear rod 252, pressure block 2421, and elastic plate 2422 on the left and right sides move in opposite directions, increasing the distance between them and releasing the clamping of the wires in the left and right directions. At this point, the wires are free to be removed for operation.

[0056] In summary, the terminal block has the following advantages:

[0057] Advantage 1: The spacing between housing 1 21, housing 2 22, and multiple housings 3 23, all designed with the same structure, is adjustable via an adjustment member 13. A screw 133 penetrates housing 1 21 and pivots to the fixed outer surface of housing 2 22, enabling adjustment of the spacing between housings 1 21 and 2 22. Furthermore, a rotating shaft 132 fixedly connected to the lower surfaces of housings 1 21, 22, and multiple housings 3 23 pivots to a connecting rod 131, forming a parallelogram mechanism. This ensures that the distances between adjacent housings 1 21, 22, and 3 23 are equal, ensuring simultaneous and equidistant adjustment of multiple sets of terminals, avoiding stress concentration or installation interference caused by uneven spacing. Therefore, the device can accommodate wires of varying specifications (cross-sectional area, voltage, and current) in electrical equipment, strictly adhering to national electrical standards and avoiding arc discharge, creepage, and other accidents caused by insufficient spacing. It is particularly suitable for high-voltage, high-current applications. The device can increase spacing based on the outer diameter of the insulation of thick wires, preventing compression or contact between the insulation layers of adjacent terminals, reducing the risk of short circuits and improving insulation reliability.

[0058] Advantage 2: In practical applications, the distance between two adjacent connecting posts 244 can be easily adjusted by turning the screw 133. The threaded connection between the screw 133 and the housing 1 21, as well as its fit with the support sleeve 11, ensures stable and precise distance adjustment. Furthermore, the dimension lines on the upper surface of the base 1 provide an intuitive reference for users, allowing for quick and accurate adjustment to the desired spacing.

[0059] Advantage 3: Compared to traditional screw-type terminals that only apply clamping force to the wires in the vertical direction, the movable member 25 can clamp the wires in the left-right direction. Combined with the subsequent use of the screw 245, the wires are firmly clamped in the left-right direction and the front-back direction. This can effectively prevent the wires from loosening due to external vibrations, tilting, and other factors, thereby improving the reliability of the electrical connection. The movable member 25 and the elastic sheet 2422 can eliminate the lateral deviation of the wires, preventing problems such as a reduction in the contact area between the piezoelectric sheet 243 and the core wire and an increase in contact resistance caused by the deviation of the wires. This effectively avoids electrical faults such as overheating, excessive local temperature rise, and even burning of the terminals, ensuring the safe operation of electrical equipment.

[0060] Advantage 4: The left and right clamping function of the movable part 25 can flexibly adapt to wires of different diameters within a certain range. Regardless of whether the wire is thicker or thinner, the position of the insulating frame 242 and the pressing block 2421 can be adjusted to make the elastic sheet 2422 fit tightly with the outer surface of the wire, thereby achieving stable clamping. The elastic sheet 2422 has a certain anti-loosening design and can compensate for the gap through deformation.

[0061] Advantage 5: When it is necessary to remove the wire from the single special-shaped slot 211, the pawl 254 is unlocked by twisting the screw 245 and pulling the connecting rod 257, first releasing the pressure in the front and rear directions, and then releasing the clamping in the left and right directions, avoiding damage to the wire and terminal due to sudden release of the clamping, and can quickly release the wire without the need for special tools, thereby improving maintenance efficiency and reducing downtime for maintenance.

[0062] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A thread-adjustable, variable-pitch wiring terminal, characterized in that: include: A base (1), one side of the base (1) is fixedly connected to a support sleeve (11), the base (1) is fixedly connected to a shell body (22) via a slide groove (12) provided therein, a side of the shell body (22) close to the support sleeve (11) is provided with a shell body (21) slidably connected to the inside of the slide groove (12), a side of the shell body (22) away from the shell body (21) is provided with a shell body (23) slidably connected to the inside of the slide groove (12), a plurality of shell bodies (23) are provided, an adjusting member (13) for adjusting the distance between the shell body (21), the shell body (22) and the shell body (23) is provided inside the slide groove (12), and a special-shaped groove (211) is provided inside the shell body (211), and a wiring assembly (24) is provided inside the special-shaped groove (211); The adjusting member (13) includes a connecting rod (131), and the connecting rod (131) is provided with a plurality of groups, and each group of the connecting rods (131) is provided with two connecting rods (131), and the two connecting rods (131) are cross-distributed, and the lower surfaces of the shell one (21), the shell two (22) and the shell three (23) are fixedly connected with a rotating shaft (132), and the middle parts of adjacent connecting rods (131) are rotatably connected through the rotating shaft (132), and the interior of the support sleeve (11) is rotatably connected with a screw rod (133), and the outer end of the screw rod (133) passes through the shell one (21) and is rotatably connected to the outer surface of the shell two (22); The wiring assembly (24) includes a conductive frame (241) embedded in the special-shaped groove (211), an insulating frame (242) is provided inside the special-shaped groove (211) and is slidably connected to the outer surface of the conductive frame (241), two insulating frames (242) are provided and symmetrically distributed on the left and right sides of the conductive frame (241), a through hole (2411) is provided on one side of the conductive frame (241), a piezoelectric plate (243) is fixedly connected to the top of the conductive frame (241), and a connecting column (244) is fixedly connected to the side of the conductive frame (241) away from the through hole (2411). A moving part (25) for changing the position of the insulating frame (242) is provided at the bottom of the inner wall of (211), and the moving part (25) includes a gear (251) rotatably connected to the bottom of the inner wall of the special-shaped groove (211). A gear rod (252) is fixedly connected to the lower surface of the insulating frame (242), and two gear rods (252) are provided and distributed in a circular array along the central axis of the gear (251). A pressing block (2421) is fixedly connected to one side of the insulating frame (242) close to the conductive frame (241), and an elastic sheet (2422) is fixedly connected to one side of the pressing block (2421) close to the conductive frame (241).

2. The thread-adjustable, variable-pitch wiring terminal according to claim 1, characterized in that: The lower surface of the gear rod (252) is provided with a sliding rod (253) that is slidably connected to the bottom of the inner wall of the special-shaped groove (211); a tooth groove (2531) is provided on the side of the sliding rod (253) close to the gear (251); a ratchet (2532) is provided on the side of the sliding rod (253) away from the gear (251); and the special-shaped groove (211) is rotatably connected to a ratchet (254) via a fixed shaft provided at the bottom of the inner wall thereof.

3. The thread-adjustable, variable-pitch wiring terminal according to claim 2, characterized in that: The outer circumferential surface of the fixed shaft is sleeved with a torsion spring (255) connected to the inside of the pawl (254), and the bottom of the inner wall of the special-shaped groove (211) is fixedly connected to a limit block (256) that fits the outer surface of the pawl (254).

4. The thread-adjustable, variable-pitch wiring terminal according to claim 3, characterized in that: One end of the ratchet (254) away from the slide rod (253) is rotatably connected to a connecting rod (257), and the connecting rod (257) is connected to the bottom of the inner wall of the special-shaped groove (211) in a damping sliding manner.

5. The thread-adjustable, variable-pitch wiring terminal according to claim 1, characterized in that: The internal thread of the conductive frame (241) is connected to a screw rod (245) that fits the outer surface of the piezoelectric sheet (243).

6. The thread-adjustable, variable-pitch wiring terminal according to claim 1, characterized in that: The upper surface of the base (1) is provided with a dimension line.

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