Thread adjusting type distance-variable wiring terminal for wiring

Abstract

The invention relates to the technical field of electronic components, and discloses a thread adjusting type distance-variable wiring terminal for wiring, which comprises a base, one side of the base is fixedly connected with a supporting sleeve, and the base is fixedly connected with a shell II through a sliding groove formed in the base. The thread adjusting type spacing-variable wiring terminal for wiring can effectively solve the technical problems that in the prior art, most wiring terminal strips in the market adopt a fixed spacing design, and in large industrial electrical equipment, especially in a high-voltage or large-current scene, wires with relatively large diameters often need to be used for bearing higher energy, so that the wiring cost is relatively high. In the prior art, the national electrical standard definitely stipulates the terminal distance, the distances between the electric connection columns of the electrical equipment with different specifications are different, and the wiring terminal strip with the fixed distance cannot be flexibly adjusted according to the actually used electric wire specification and the distances between the electric connection columns of the electrical equipment, so that the problem that the electric wire is not matched with the terminal strip in the actual application occurs.

Description

Technical Field

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

[0002] In an electrical system, a terminal is a core component for realizing reliable connections between wires and devices, and between wires and wires. With the development of industrial intelligence and new energy technologies, the complexity and integration degree of electrical systems have been continuously improved, posing higher requirements for the compatibility, safety, and flexibility of terminals.

[0003] In the prior art, most terminal blocks on the market adopt a fixed-spacing design. In large industrial electrical equipment, especially in high-voltage or high-current scenarios, thicker wires are often required to carry higher energy. The national electrical standard has clear regulations on terminal spacing, and the distances between connection posts of electrical equipment with different specifications are also different. The terminal block with a fixed spacing cannot be flexibly adjusted according to the actual wire specifications used and the distances between connection posts of electrical equipment, resulting in a situation where the wires do not match the terminal block in actual applications. Summary of the Invention

[0004] Aiming at the above-mentioned drawbacks of the prior art, the present invention provides a threaded adjustable variable-spacing terminal for wiring, which can effectively solve the problems in the prior art that most terminal blocks on the market adopt a fixed-spacing design. In large industrial electrical equipment, especially in high-voltage or high-current scenarios, thicker wires are often required to carry higher energy. The national electrical standard has clear regulations on terminal spacing, and the distances between connection posts of electrical equipment with different specifications are also different. The terminal block with a fixed spacing cannot be flexibly adjusted according to the actual wire specifications used and the distances between connection posts of electrical equipment, resulting in a problem that the wires do not match the terminal block in actual applications.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: The present invention provides a threaded adjustable variable-spacing terminal for wiring, including: A base, one side of the base is fixedly connected with a support sleeve. The base is fixedly connected with a second housing through a chute opened in its interior. A first housing that is slidably connected to the interior of the chute is arranged on one side of the second housing close to the support sleeve. A third housing that slides with the interior of the chute is arranged on the side of the second housing away from the first housing. There are multiple third housings. An adjusting member for adjusting the spacing between the first housing, the second housing, and the third housings is arranged in the interior of the chute. Special-shaped grooves are opened in the interiors of the first housing, the second housing, and the third housings, and wiring assemblies are arranged in the special-shaped grooves. Among them, the adjusting member includes a connecting rod. There are several groups of the connecting rods, and there are two connecting rods in each group. The two connecting rods are cross - distributed. The lower surfaces of the first housing, the second housing, and the third housing are all fixedly connected with rotating shafts. The middle parts of adjacent connecting rods are rotatably connected through the rotating shafts. A lead screw is rotatably connected inside the support sleeve, and the outer end of the lead screw penetrates through the first housing and is rotatably connected with the outer surface of the second housing.

[0006] Further, the wiring assembly includes a conductive frame embedded and installed inside the special - shaped groove. An insulating frame that is slidably connected to the outer surface of the conductive frame is arranged inside the special - shaped groove. There are two insulating frames and they are symmetrically distributed on the left and right sides of the conductive frame. A through - hole is opened on one side of the conductive frame. A piezoelectric sheet is fixedly connected above the conductive frame. A connecting column is fixedly connected to the side of the conductive frame away from the through - hole. A moving member for changing the position of the insulating frame is arranged at the bottom of the inner wall of the special - shaped groove.

[0007] Further, the moving member includes a gear rotatably connected to the bottom of the inner wall of the special - shaped groove. A toothed rod is fixedly connected to the lower surface of the insulating frame. There are two toothed rods and they are circumferentially arranged in an array along the central axis of the gear.

[0008] Further, a sliding rod that is slidably connected to the bottom of the inner wall of the special - shaped groove is arranged on the lower surface of the toothed rod. A tooth groove is opened on the side of the sliding rod close to the gear, and a ratchet tooth is opened on the side of the sliding rod away from the gear. The special - shaped groove is rotatably connected with a ratchet pawl through a fixed shaft arranged at the bottom of its inner wall.

[0009] Further, a torsion spring connected to the inside of the ratchet pawl is sleeved on the outer surface of the fixed shaft. A limiting block that fits the outer surface of the ratchet pawl is fixedly connected to the bottom of the inner wall of the special - shaped groove. Under the action of the torsion spring, the ratchet pawl fits the outer surface of the limiting block.

[0010] Further, one end of the ratchet pawl away from the sliding rod is rotatably connected with a connecting rod, and the connecting rod is connected with the bottom of the inner wall of the special - shaped groove in a damped sliding manner.

[0011] Further, a screw rod that fits the outer surface of the piezoelectric sheet is threadedly connected inside the conductive frame. A pressing block is fixedly connected to the side of the insulating frame close to the conductive frame.

[0012] Further, an elastic sheet is fixedly connected to the side of the pressing block close to the conductive frame. A dimension line is arranged on the upper surface of the base 1.

[0013] The technical solution provided by the present invention has the following beneficial effects compared with the prior art: The present invention is provided with a first housing, a second housing, a third housing, an adjusting member, and a base. The first housing, the second housing, and multiple third housings adopt the same structural design. By rotating the lead screw through the outer surface of the fixed second housing and the first housing, the adjustment of the distance between the first housing and the second housing is realized. Also, through the rotation connection of the rotating shafts fixedly connected to the lower surfaces of the first housing, the second housing, and multiple third housings with the connecting rods, a parallelogram mechanism is formed, thereby realizing equal distances between adjacent first housing, second housing, and multiple third housings, ensuring synchronous and equidistant adjustment of multiple groups of terminals, and avoiding stress concentration or installation interference caused by uneven distances. Therefore, it can adapt to different specifications of wires (cross-sectional area, voltage, current) in electrical equipment, flexibly match the wires and electrical connection posts in different electrical equipment, strictly follow national electrical standards, and avoid accidents such as arc discharge and creepage caused by insufficient distance, especially suitable for high-voltage and high-current scenarios. It can expand the distance according to the outer diameter of the insulation of thick wires, avoid extrusion or contact of the insulation layer between adjacent terminals, reduce the risk of short-circuit lines, and improve the reliability of insulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention, and for those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0015] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the present invention; Figure 2 It is a cross-sectional structural schematic diagram of the base of an embodiment of the present invention; Figure 3 It is a structural schematic diagram of the adjusting member, the first housing, the second housing, and the third housing of an embodiment of the present invention from another angle; Figure 4 It is a structural schematic diagram of the special-shaped groove, the conductive frame, and the insulating frame of an embodiment of the present invention; Figure 5 It is a structural schematic diagram of the toothed rod, the gear, the conductive frame, and the insulating frame of an embodiment of the present invention from another angle; Figure 6 It is a separated structural schematic diagram of the wiring component of an embodiment of the present invention; Figure 7 It is a structural schematic diagram of the moving member and the special-shaped groove of an embodiment of the present invention; Figure 8 For an embodiment of the present invention Figure 7 It is a partially enlarged structural schematic diagram at A in the figure; Figure 9 It is a structural schematic diagram of the torsion spring, the limit block, the ratchet pawl, and the connecting rod of an embodiment of the present invention; Figure 10 This is a schematic structural diagram of the insulating frame and the toothed rod in the embodiment of the present invention.

[0016] The reference numerals in the figure respectively represent: 1, base; 11, support sleeve; 12, chute; 13, adjusting member; 131, connecting rod; 132, rotating shaft; 133, lead screw; 21, housing one; 211, special-shaped groove; 22, housing two; 23, housing three; 24, wiring assembly; 241, conductive frame; 2411, through hole; 242, insulating frame; 2421, pressing block; 2422, elastic sheet; 243, piezoelectric sheet; 244, connecting column; 245, screw; 25, moving member; 251, gear; 252, toothed rod; 253, sliding rod; 2531, tooth groove; 2532, ratchet tooth; 254, ratchet pawl; 255, torsion spring; 256, limiting block; 257, connecting rod. Specific embodiments

[0017] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0018] The present invention will be further described below with reference to the embodiments.

[0019] Embodiment:

[0020] Please refer to Figures 1-10 , the present invention provides a technical solution: a thread-adjustable spacing-variable wiring terminal for wiring, comprising: A base 1, one side of the base 1 is fixedly connected with a support sleeve 11, the base 1 is fixedly connected with a housing two 22 through a chute 12 opened in its interior, a housing one 21 slidably connected to the interior of the chute 12 is arranged on one side of the housing two 22 close to the support sleeve 11, a housing three 23 slidably connected to the interior of the chute 12 is arranged on one side of the housing two 22 away from the housing one 21, a plurality of housing threes 23 are arranged and distributed in an array along the left-right direction, an adjusting member 13 for adjusting the spacing between the housing one 21, the housing two 22 and the housing three 23 is arranged in the interior of the chute 12, special-shaped grooves 211 are opened in the interiors of the housing one 21, the housing two 22 and the housing three 23, and a wiring assembly 24 is arranged in the interior of the special-shaped grooves 211. The housing one 21, the housing two 22 and the housing three 23 are all designed with the same structure.

[0021] Among them, the adjusting member 13 includes a connecting rod 131. There are several groups of connecting rods 131, and each group has two connecting rods 131, which are cross - distributed between the two connecting rods 131. The lower surfaces of the first housing 21, the second housing 22, and the third housing 23 are all fixedly connected with a rotating shaft 132. The middle parts of adjacent connecting rods 131 are rotationally connected through the rotating shaft 132. A lead screw 133 is rotationally connected inside the support sleeve 11, and the outer end of the lead screw 133 penetrates through the first housing 21 and is rotationally connected with the outer surface of the second housing 22.

[0022] The wiring assembly 24 includes a conductive frame 241 embedded and installed inside the special - shaped groove 211. An insulating frame 242 that is slidably connected to the outer surface of the conductive frame 241 is arranged inside the special - shaped groove 211. There are two insulating frames 242, which are symmetrically distributed on the left and right sides of the conductive frame 241. A through - hole 2411 is opened on one side of the conductive frame 241. A piezoelectric sheet 243 is fixedly connected above the conductive frame 241. A connecting column 244 is fixedly connected to the side of the conductive frame 241 far from the through - hole 2411. A moving member 25 for changing the position of the insulating frame 242 is arranged at the bottom of the inner wall of the special - shaped groove 211.

[0023] The moving member 25 includes a gear 251 rotationally connected to the bottom of the inner wall of the special - shaped groove 211. A rack 252 is fixedly connected to the lower surface of the insulating frame 242. There are two racks 252, which are circumferentially arrayed along the central axis of the gear 251.

[0024] A sliding rod 253 that is slidably connected to the bottom of the inner wall of the special - shaped groove 211 is arranged on the lower surface of the rack 252. A tooth groove 2531 is opened on the side of the sliding rod 253 close to the gear 251. A ratchet tooth 2532 is opened on the side of the sliding rod 253 far from the gear 251. The special - shaped groove 211 is rotationally connected with a ratchet pawl 254 through a fixed shaft arranged at the bottom of its inner wall.

[0025] A torsion spring 255 connected to the inside of the ratchet pawl 254 is sleeved on the outer surface of the fixed shaft. A limiting block 256 that fits the outer surface of the ratchet pawl 254 is fixedly connected to the bottom of the inner wall of the special - shaped groove 211. Under the action of the torsion spring 255, the ratchet pawl 254 fits the outer surface of the limiting block 256.

[0026] One end of the ratchet pawl 254 far from the sliding rod 253 is rotationally connected with a connecting rod 257, and the connecting rod 257 is damping - slidably connected to the bottom of the inner wall of the special - shaped groove 211.

[0027] A screw rod 245 that fits the outer surface of the piezoelectric sheet 243 is threadedly connected inside the conductive frame 241. A pressing block 2421 is fixedly connected to the side of the insulating frame 242 close to the conductive frame 241.

[0028] One side of the pressing block 2421 close to the conductive frame 241 is fixedly connected with an elastic sheet 2422. A dimension line is also arranged on the upper surface of the base 1. Starting from the position of the connecting column 244 in the housing two 22, the dimension line extends towards the position of the housing one 21, which can facilitate the user to quickly adjust the distance between two adjacent connecting columns 244.

[0029] The process of adjusting the distance between two adjacent terminal blocks: The terminal block is applied to the wiring in electrical equipment. Since there are various specifications and diameters of wires in electrical equipment, and the national electrical standard has clear regulations on the terminal spacing, it is necessary to consider the wire cross-sectional area, voltage level and current load at the same time. In high-voltage or high-current scenarios, thick wires carry higher energy. If the terminal spacing is insufficient, accidents may be caused by arc discharge or creepage. Therefore, the distance between the connection posts of different specifications of electrical equipment will vary. In order to meet the diverse needs, the terminal block of this application adopts an adjustable-spacing design.

[0030] In actual application, adjust according to the distance between the connection posts in the corresponding terminal block, so that the distance between two adjacent connecting columns 244 in this application is equal to the distance between the connection posts of the corresponding terminal block. Twist the lead screw 133. The outer circumferential surface of the outer end of the lead screw 133 fits with the inner wall surface of the support sleeve 11. The outer circumferential surface of the middle part of the lead screw 133 is threadedly connected with the inside of the housing one 21. One end of the lead screw 133 away from the support sleeve 11 is rotatably connected to one side of the housing two 22 close to the housing one 21. After rotating the lead screw 133, the housing one 21 meshes with the outer surface of the lead screw 133 and slides left and right inside the chute 12 opened on the upper surface of the base 1. A dimension line is also arranged on the upper surface of the base 1. Starting from the position of the connecting column 244 in the housing two 22, the dimension line extends towards the position of the housing one 21, which can facilitate the user to quickly adjust the distance between two adjacent connecting columns 244.

[0031] The lower surfaces of the middles of the first housing 21, the second housing 22, and the third housing 23 are all fixedly connected with a rotating shaft 132. Two connecting rods 131 are rotatably connected to the outside of the rotating shaft 132 along the axial direction. The two connecting rods 131 are staggeredly distributed. Several groups of connecting rods 131 and the rotating shaft 132 form a parallelogram structure. When adjusting the position of the first housing 21 by rotating the lead screw 133, since the second housing 22 is fixed, the distance between the first housing 21 and the second housing 22 changes, that is, the distance between the connecting columns 244 on the corresponding lower surfaces of the first housing 21 and the second housing 22 changes. Correspondingly, the distance between the second housing 22 and the first third housing 23 in the direction close to the support sleeve 11 changes, and the distance between the third housing 23 and the adjacent third housing 23 changes. At this time, the distances between the rotating shafts 132 on the lower surfaces of the first housing 21, the second housing 22, and the multiple third housings 23 are the same, and the distances between the multiple connecting columns 244 are also the same. When the distance between the corresponding connecting columns 244 of the first housing 21 and the second housing 22 meets the corresponding wiring terminal, stop rotating the lead screw 133. The lead screw 133 is a self-locking lead screw 133 and will not rotate without external rotation. The first housing 21, the second housing 22, and the multiple third housings 23 all adopt the same structural design.

[0032] The process of inserting and clamping the external electric wire: Connect the electric wire in the corresponding electrical equipment to the wiring assembly 24 inside the special-shaped groove 211. The space enclosed by the two symmetric insulating frames 242, the conductive frame 241, and the side of the piezoelectric sheet 243 far from the through hole 2411 is the placement cavity. The thickness of the gear 251 is greater than the sum of the thickness of the rack 252 and the sliding rod 253. The lower surface of the rack 252 is attached to the upper surface of the sliding rod 253. Limiting strips are provided on the inner wall surfaces of the special-shaped grooves 211 of the first housing 21, the second housing 22, and the third housing 23, which can satisfy the left-right horizontal sliding of the insulating frame 242 inside the special-shaped groove 211. The lower surface of the insulating frame 242 is fixedly connected to the upper surface of the rack 252. Therefore, the rack 252 also slides horizontally left and right inside the special-shaped groove 211, while the gear 251 is rotatably connected to the middle position at the bottom of the inner wall of the special-shaped groove 211. The connecting rod 257 and the sliding rod 253 slide horizontally back and forth on the bottom of the inner wall of the special-shaped groove 211 through the sliding strips.

[0033] Taking the housing 1-21 as an example, insert a single rigid wire into the interior of the placement cavity from the top of the special-shaped groove 211. The outer surfaces of the connecting rod 257 and the sliding rod 253 away from the piezoelectric sheet 243 are almost parallel to the outer surface of the housing 1-21. In the initial state, the distance between the two insulating frames 242 is relatively large. Correspondingly, the distance between the two toothed rods 252 is relatively large. After placing the wire, use tools such as a screwdriver to horizontally slide the sliding rod 253 in the front-rear direction into the special-shaped groove 211. During the movement of the sliding rod 253, the tooth groove 2531 on its outer surface is always engaged with the outer surface of the gear 251. Under the action of the sliding rod 253, the gear 251 rotates clockwise around its axis.

[0034] During the movement of the sliding rod 253, the ratchet tooth 2532 on the other side thereof will engage with the pawl 254. For each section that the sliding rod 253 advances, the pawl 254 will rotate counterclockwise by a certain angle around the fixed shaft in the middle thereof, and under the action of the torsion spring 255, it will return again until the outer surface of the pawl 254 fits against the outer surface of the limit block 256. Since there are two toothed rods 252 circumferentially arrayed on the front and rear sides of the gear 251, and the adjacent surfaces of the two toothed rods 252 are both engaged with the outer surface of the gear 251, when the gear 251 rotates clockwise, the toothed rod 252 on the left side will drive the insulating frame 242 on the left side to slide horizontally to the right, and the toothed rod 252 on the right side will drive the insulating frame 242 on the right side to slide horizontally to the left, and the distance between the two insulating frames 242 gradually approaches.

[0035] During this process, the pressing block 2421 fixedly connected to the inner wall surface of the insulating frame 242 also moves synchronously until the elastic pieces 2422 on both the left and right sides are simultaneously in contact with the outer surface of the wire inside the placement cavity. After continuing to push the sliding rod 253 forward by a certain distance, the elastic pieces 2422 on both sides undergo elastic deformation. At this time, the sliding rod 253 cannot move forward any further. Due to the unidirectional cooperation between the pawl 254 and the ratchet tooth 2532, the elastic pieces 2422 on both sides and the pressing block 2421 clamp the external wire stably. One end of the pawl 254 away from the gear 251 is designed with a hollow, and one end of the connecting rod 257 close to the pawl 254 is also designed with a hollow, and the two can be rotatably connected relative to each other. During this process, the connecting rod 257 is not affected by the rotation of the pawl 254.

[0036] At present, the piezoelectric sheet 243 in most screw-type terminal blocks only exerts a clamping force on the wire in the vertical direction. At this time, the direction of the clamping force is perpendicular to the axis of the wire, but it can only restrict the movement of the wire in the vertical plane, and there is a lack of direct restraint force in the horizontal direction. The width of the conductive sheet is greater than the diameter of the wire. If the wire is subjected to external forces in the horizontal direction, such as pulling and vibration, the wire will displace within the horizontal gap, thereby affecting the stability of the electrical equipment connection. The clamping force in the vertical direction will generate a normal pressure perpendicular to the contact surface, thereby forming a frictional force (the direction is parallel to the contact surface). However, this frictional force mainly restricts the sliding of the wire in the vertical plane (up and down movement, front and back movement), and the frictional force in the horizontal direction cannot effectively limit the lateral offset (left and right offset) of the wire due to the lack of the action of the normal pressure. The offset of the wire will cause the contact area between the piezoelectric sheet 243 and the core wire to decrease and the contact resistance to increase, which may cause heating, excessive local temperature rise, and even burnout of the terminal. In a vibrating environment, continuous horizontal offset may cause the mechanical connection between the wire and the terminal to become loose, and in severe cases, it may cause wire breakage or short-circuit faults. When the diameter of the wire is smaller than the width of the piezoelectric sheet 243 in a terminal clamped in a single direction, the horizontal offset is an objectively existing potential risk, and its essence is the lack of mechanical stability caused by the single direction of the restraint force and the gap. By using the moving part 25, the wire can be clamped in the left and right directions. While flexibly adapting to wires of different diameters within a certain range, it can also eliminate the lateral offset of the wire, prevent the wire from loosening, and ensure the stability and safety of the connection.

[0037] After stably clamping in the left and right directions, the screw 245 is inserted into the internal part of the special-shaped groove 211 from the outside of the housing one 21. After the outer end of the screw 245 passes through the through hole 2411 and contacts the outer surface of the piezoelectric sheet 243, it drives the piezoelectric sheet 243 to approach the outer surface of the external wire. Tighten the screw 245 so that the wire is also stably constrained in the vertical parallel direction. At this time, the wire is firmly clamped in both the left and right directions and the front and back directions, reducing the situation of wire loosening due to external vibration and inclination during subsequent use. The diameter of the wire with the smallest diameter adapted in the placement groove is greater than the distance from the inner wall surface of the conductive frame 241 close to the connecting column 244 to the outer surface of the pressing block 2421 far from the connecting column 244, which can ensure that the piezoelectric sheet 243 can stably clamp it in the front and back directions. A groove is provided on the surface of the pressing block 2421 close to the piezoelectric sheet 243. Since the housing one 21, the housing two 22, and the housing three 23 adopt the same structural design, the remaining wires can also be connected to the housing two 22 and the housing three 23 by the above method.

[0038] The process of removing the wire: When performing maintenance or wiring modifications, it is necessary to remove the wire from inside the single-shaped slot 211. Turn the screw 245 outward to make the piezoelectric sheet 243 rebound toward the side of the through hole 2411, initially releasing the pressure on the wire in the front and back directions. Pull the connecting rod 257 outward from the side close to the connecting column 244. When the connecting rod 257 moves toward the connecting column 244, the hollow inner wall at the outer end of the connecting rod 257 comes into contact with the hollow inner wall of the pawl 254 and drives the pawl 254 to rotate counterclockwise around the fixed shaft in the middle, causing the outer surface of the pawl 254 to disengage from the ratchet teeth 2532 on the outer side of the slide rod 253. At this time, the slide rod 253 is controlled by the pawl 254 to release its unidirectionality. After losing the restriction, the insulating frames 242, toothed rods 252, pressing blocks 2421, and elastic sheets 2422 symmetrically distributed on the left and right sides move away from each other, and the distance between them becomes larger and larger, and the wire is also released from clamping in the left and right directions. At this time, the wire can be freely removed for operation.

[0039] In summary, the terminal has the following advantages: Advantage 1: The housing 1-21, housing 2-22, and multiple housing 3-23 with the same structural design are provided with an adjustable spacing design through the adjusting member 13. The lead screw 133 passes through the housing 1-21 and is rotatably connected to the outer surface of the fixed housing 2-22 to adjust the spacing between the housing 1-21 and the housing 2-22. Also, the rotating shafts 132 fixedly connected to the lower surfaces of the housing 1-21, housing 2-22, and multiple housing 3-23 are rotatably connected to the connecting rod 131 to form a parallelogram mechanism, thereby ensuring that the distances between adjacent housing 1-21, housing 2-22, and multiple housing 3-23 are equal, 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 different specifications of wires (cross-sectional area, voltage, current) in electrical equipment, strictly follow national electrical standards, and avoid accidents such as arc discharge and creepage caused by insufficient spacing, especially suitable for high-voltage and high-current scenarios. It can expand the spacing according to the outer diameter of the insulation of thick wires, avoid extrusion or contact of the insulation layer between adjacent terminals, reduce the risk of short-circuit lines, and improve the reliability of insulation.

[0040] Advantage 2: In practical applications, by turning the lead screw 133, it is possible to conveniently adjust the distance between two adjacent connecting columns 244. The threaded connection of the lead screw 133 with the housing 1-21 and its fitting design with the support sleeve 11 make the distance adjustment process stable and accurate. At the same time, the dimension lines set on the upper surface of the base 1 provide an intuitive reference for users, and the required spacing can be quickly and accurately adjusted.

[0041] Advantage 3: Compared with traditional screw - type terminal blocks that only apply clamping force to the wire in the vertical direction, the moving part 25 can clamp the wire in the left - right direction. Combining with the subsequent use of the screw 245, the wire is firmly clamped in both the left - right direction and the front - back direction. This can effectively prevent the wire from loosening due to external vibration, inclination and other factors, and improve the reliability of electrical connection. By the moving part 25 and the elastic piece 2422, the lateral offset of the wire can be eliminated, preventing problems such as the reduction of the contact area between the piezoelectric piece 243 and the core wire and the increase of contact resistance. This effectively avoids electrical faults such as heating, excessive local temperature rise and even burning out of the terminal, ensuring the safe operation of electrical equipment.

[0042] Advantage 4: Utilizing the left - right clamping function of the moving part 25, it can flexibly adapt to wires with different diameters within a certain range. Whether the wire is thicker or thinner, by adjusting the positions of the insulating frame 242 and the pressing block 2421, the elastic piece 2422 can be closely attached to the outer surface of the wire, thus achieving stable clamping. The elastic piece 2422 has a certain anti - loosening design and can compensate for the gap through deformation.

[0043] Advantage 5: When it is necessary to remove the wire from the single special - shaped groove 211, by turning the screw 245 and pulling the connecting rod 257 to release the locking of the pawl 254, first release the pressing in the front - back direction and then release the clamping in the left - right direction, avoiding damage to the wire and the terminal caused by suddenly releasing the clamping. The wire can be quickly released without special tools, improving the maintenance efficiency and reducing the downtime for maintenance.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A threaded adjustable pitch variable wiring terminal for wiring, characterized in that, Including: A base (1), one side of the base (1) is fixedly connected with a support sleeve (11), the base (1) is fixedly connected with a second housing (22) through a chute (12) opened in its interior, one side of the second housing (22) close to the support sleeve (11) is provided with a first housing (21) slidably connected to the interior of the chute (12), one side of the second housing (22) away from the first housing (21) is provided with a third housing (23) slidable in the interior of the chute (12), there are multiple third housings (23), and an adjusting member (13) for adjusting the distance between the first housing (21), the second housing (22) and the third housing (23) is arranged in the interior of the chute (12). Special-shaped grooves (211) are opened in the interiors of the first housing (21), the second housing (22) and the third housing (23), and a wiring assembly (24) is arranged in the special-shaped grooves (211). Among them, the adjusting member (13) includes a connecting rod (131), there are several groups of the connecting rods (131), two connecting rods (131) are provided in each group, and the two connecting rods (131) are cross-distributed. Rotating shafts (132) are fixedly connected to the lower surfaces of the first housing (21), the second housing (22) and the third housing (23), and the middle parts of adjacent connecting rods (131) are rotatably connected through the rotating shafts (132). A lead screw (133) is rotatably connected to the interior of the support sleeve (11), and the outer end of the lead screw (133) penetrates through the first housing (21) and is rotatably connected to the outer surface of the second housing (22).

2. The thread-adjustable pitch-variable wiring terminal for wiring according to claim 1, characterized in that: The wiring assembly (24) includes a conductive frame (241) embedded and installed in the special-shaped groove (211), an insulating frame (242) slidably connected to the outer surface of the conductive frame (241) is arranged in the special-shaped groove (211), there are two insulating frames (242) and they are symmetrically distributed on the left and right sides of the conductive frame (241). A through hole (2411) is opened on one side of the conductive frame (241), a piezoelectric sheet (243) is fixedly connected above 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), and a moving member (25) for changing the position of the insulating frame (242) is arranged at the bottom of the inner wall of the special-shaped groove (211).

3. The threaded adjustable pitch variable wiring terminal for wiring according to claim 2, characterized in that: The moving member (25) includes a gear (251) rotatably connected to the bottom of the inner wall of the special-shaped groove (211), a toothed rod (252) is fixedly connected to the lower surface of the insulating frame (242), and there are two toothed rods (252) and they are circumferentially arranged in an array along the central axis of the gear (251).

4. The threaded adjustable pitch variable wiring terminal for wiring according to claim 3, characterized in that: A sliding rod (253) slidably connected to the bottom of the inner wall of the special-shaped groove (211) is arranged on the lower surface of the toothed rod (252). A tooth groove (2531) is opened on the side of the sliding rod (253) close to the gear (251), a ratchet tooth (2532) is opened on the side of the sliding rod (253) away from the gear (251), and a ratchet pawl (254) is rotatably connected to the special-shaped groove (211) through a fixed shaft arranged at the bottom of its inner wall.

5. A threaded adjustable pitch variable wiring terminal for wiring, characterized in that: A torsion spring (255) connected to the inside of the pawl (254) is sleeved on the circumferential outer surface of the fixed shaft, and a limiting block (256) that fits against the outer surface of the pawl (254) is fixedly connected to the bottom of the inner wall of the special-shaped groove (211).

6. The threaded adjustable pitch variable wiring terminal for wiring according to claim 5, characterized in that: One end of the pawl (254) far from the sliding rod (253) is rotatably connected to a connecting rod (257), and the connecting rod (257) is in damped sliding connection with the bottom of the inner wall of the special-shaped groove (211).

7. The threaded adjustable pitch variable wiring terminal for wiring according to claim 3, characterized in that: A screw rod (245) that fits against the outer surface of the piezoelectric sheet (243) is threadedly connected inside the conductive frame (241), and a pressing block (2421) is fixedly connected to one side of the insulating frame (242) close to the conductive frame (241).

8. The threaded adjustable pitch variable wiring terminal for wiring according to claim 7, characterized in that: An elastic sheet (2422) is fixedly connected to one side of the pressing block (2421) close to the conductive frame (241), and dimension lines are arranged on the upper surface of the base (1).

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