Self-locking wedge-shaped parallel groove clamp

Abstract

The invention discloses a self-locking wedge-shaped parallel groove clamp, and relates to the technical field of cable clamps, and the clamp comprises a locking groove and a rectangular hole. The wedge-shaped pressing block comprises an avoiding groove and a pushing groove. The insulating shell comprises an insulating box and a capping box; the self-locking unit comprises a first limiting piece, an ejection piece, a second limiting piece and a positioning piece. According to the invention, the wedge-shaped pressing block is matched with the inclined locking groove in the wire clamp cavity, and the self-locking principle of an inclined plane is utilized, so that the larger the radial pressure generated after the wire is pressed is, the stronger the self-locking effect is, and the connection looseness caused by vibration, wind load or thermal expansion and cold contraction is effectively prevented. The jacking piece and the positioning piece in the self-locking unit apply and lock pressing force to the wedge-shaped pressing block from the upper direction and the lower direction, bidirectional mechanical limiting is formed, the backspacing gap of the wedge-shaped pressing block is eliminated, the long-term stability of the crimping force is ensured, and the fault of wire clamp burning caused by looseness is fundamentally avoided.

Description

Technical Field

[0001] This invention relates to cable clamp technology, and in particular to a self-locking wedge-shaped parallel groove clamp. Background Technology

[0002] In fields such as power transmission and distribution networks and electrified railways, parallel groove clamps are a key conductive connection hardware, undertaking important functions such as branch current diversion and conductor splicing. Their connection reliability is directly related to the safe and stable operation of the entire power system.

[0003] First, during long-term operation, the vibrations, galloping, and thermal expansion and contraction of the power lines can easily cause the clamps to loosen. Loosening not only increases contact resistance, causing abnormal heating and increased power loss, but can even lead to serious faults such as burnt-out clamps, directly threatening power supply reliability. Second, traditional clamps often rely on manual hammering for installation, making it difficult to precisely control the installation force. This can easily cause clamp deformation or damage to the conductors, and the work is inefficient, making it unsuitable for large-scale construction and high-altitude operations. Furthermore, the contact pressure of traditional clamps depends entirely on the initial installation torque, and the pressure distribution may be uneven. When the load current changes, the thermal expansion and contraction of the conductors further exacerbates the fluctuations in contact pressure, creating a vicious cycle of "increased contact resistance → increased heating → further loosening." Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is: the problem that the parallel groove clamp is inconvenient to install, and may loosen later, causing the clamp to burn.

[0005] The above-mentioned technical problems are solved by the following technical solution: The present invention proposes a self-locking wedge-shaped parallel groove clamp, which includes a clamp having locking grooves disposed on both sides of its cavity, and a rectangular hole penetrating the bottom of the clamp; The wedge-shaped pressure block slides within the locking groove; The wedge-shaped pressure block includes a clearance groove on one side and a push groove that runs through the upper and lower end faces of the wedge-shaped pressure block. The insulating housing includes an insulating box that holds the wire clamp in place, and a top box that snaps onto the end of the insulating box; The self-locking unit is slidably engaged with the push groove. The self-locking unit includes a first limiting member fixedly disposed at the bottom of the insulating box, a top member threadedly connected to the inner side of the first limiting member, a second limiting member fixedly disposed at the bottom of the capping box, and a positioning member threadedly connected to the inner side of the second limiting member.

[0006] In a preferred embodiment of the self-locking wedge-shaped grooved clamp of the present invention: the clamp further includes a groove formed on one side of its end; The wedge-shaped pressure block also includes a guide strip protruding from its end, and an adjustment member that penetrates and engages at the junction of the clearance groove and the propulsion groove.

[0007] In a preferred embodiment of the self-locking wedge-shaped parallel groove clamp of the present invention: the insulating box includes a receiving groove for fixing and snapping the clamp, and a push-in end opened on one side of the receiving groove; The receiving groove includes a bottom hole at its end.

[0008] In a preferred embodiment of the self-locking wedge-shaped parallel groove clamp of the present invention: the top box includes a mounting hole opened at the center of its bottom; The capping box and the insulating box include multiple sets of sealing bushings fixedly installed at both ends.

[0009] In a preferred embodiment of the self-locking wedge-shaped grooved clamp of the present invention: the first limiting member includes a limiting end that coincides with the axis of the rectangular hole, and a hinge end that protrudes from the rear end of the limiting end.

[0010] In a preferred embodiment of the self-locking wedge-shaped parallel groove clamp of the present invention: the top member includes a top block located inside the hinge end, a bearing fixedly engaged with the bottom of the top block, and a drive rod fixedly engaged with the inside of the bearing.

[0011] In a preferred embodiment of the self-locking wedge-shaped grooved clamp of the present invention: the top block includes an inclined surface protruding from its end and a connecting hole penetrating the axis of the top block.

[0012] In a preferred embodiment of the self-locking wedge-shaped parallel groove clamp of the present invention: the push groove includes a through groove penetrating the end face of the wedge-shaped pressure block, and an inclined side formed on one side of the through groove; The inclined surface slides into contact with the inclined side.

[0013] In a preferred embodiment of the self-locking wedge-shaped grooved clamp of the present invention: both the second limiting member and the inner side of the hinge end are provided with external threads; The positioning component has the same structure as the drive rod. The positioning component includes a light rod at its front end, a screw protruding from one end of the light rod, and a drive end protruding from the other end of the screw.

[0014] In a preferred embodiment of the self-locking wedge-shaped parallel groove clamp of the present invention: the adjusting member includes a mounting rod fixedly engaged in the shaft hole at the junction of the clearance groove and the propulsion groove, a rotating rod hinged to the inner side of the mounting rod, and a rotating plate protruding on both sides of the rotating rod.

[0015] The beneficial effects of this invention are as follows: By cooperating with the wedge-shaped pressure block and the inclined locking groove in the clamp cavity, and utilizing the principle of inclined surface self-locking, the greater the radial pressure generated after the wire is clamped, the stronger the self-locking effect, effectively preventing loosening of the connection caused by vibration, wind load, or thermal expansion and contraction. The top and positioning parts in the self-locking unit apply and lock the clamping force to the wedge-shaped pressure block from both above and below, forming a bidirectional mechanical limit, eliminating the gap of the wedge-shaped pressure block retraction, ensuring the long-term stability of the clamping force, and fundamentally avoiding the "clip burning" failure caused by loosening. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Wherein: Figure 1 A schematic diagram of the self-locking wedge-shaped parallel groove clamp of the present invention is shown; Figure 2 This invention shows a three-dimensional cross-sectional view of the wire clamp, wedge-shaped pressure block, and self-locking unit. Figure 3 An exploded view of the insulating box, wire clamp, and wedge-shaped pressure block structure of the present invention is shown; Figure 4 This diagram shows the structure of the insulating box, wire clamp, and wedge-shaped pressure block after installation according to the present invention. Figure 5 A schematic diagram of the cross-sectional structure of the self-locking wedge-shaped grooved wire clamp of the present invention is shown; Figure 6 The present invention is shown Figure 2 Enlarged view of the adjusting component structure at point A; Figure 7 A schematic diagram of the transparent structure of the wire clamp and wedge-shaped pressure block of the present invention is shown; Figure 8 A schematic diagram of the application scenario of the self-locking wedge-shaped parallel groove clamp of the present invention is shown. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0018] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.

[0019] Reference Figures 1 to 8 This embodiment provides a self-locking wedge-shaped parallel groove clamp, including a clamp 1 with locking grooves 11 disposed on both sides of its cavity, and a rectangular hole 12 penetrating the bottom of the clamp 1; The wedge-shaped pressure block 2 slides within the locking groove 11; The wedge-shaped pressure block 2 includes a clearance groove 21 opened on one side therein, and a push groove 22 passing through the upper and lower end faces of the wedge-shaped pressure block 2; The insulating housing 3 includes an insulating box 31 for fixing the load-bearing clamp 1, and a top box 32 snapped onto the end of the insulating box 31; The self-locking unit 4 is slidably engaged with the push groove 22. The self-locking unit 4 includes a first limiting member 41 fixedly disposed at the bottom of the insulating box 31, a top member 42 threadedly connected to the inner side of the first limiting member 41, a second limiting member 43 fixedly disposed at the bottom of the capping box 32, and a positioning member 44 threadedly connected to the inner side of the second limiting member 43.

[0020] In this embodiment, the wire clamp 1 is an approximately U-shaped structure integrally cast from a high-conductivity aluminum alloy. The wire clamp 1 is a cavity with an open top. The two side walls inside the cavity are not vertical planes, but rather slope inwards, forming inclined inner walls at a specific angle to the horizontal plane. On this inclined inner wall, the locking groove 11 is a slot that penetrates the wire clamp 1 through milling, and its cross-section is dovetail-shaped.

[0021] The rectangular hole 12 is a through hole penetrating the center of the bottom of the wire clamp 1. Its length direction is consistent with the U-shaped opening direction of the wire clamp 1, and its width direction is parallel to the extension direction of the locking groove 11. The shape of the rectangular hole 12 corresponds to the cross-section of the moving part in the self-locking unit 4. The rectangular hole 12 is used to accommodate the sliding passage of the screw portion of the top member 42 and the positioning member 44, and its upper and lower surfaces form a limiting fit with the ends of the top member 42 and the positioning member 44. When the top member 42 and the positioning member 44 are rotated, the screw advances axially, pushing the self-locking unit 4 as a whole to move in the advance groove 22, thereby driving the wedge-shaped pressure block 2 to slide along the locking groove 11. Since the locking groove 11 has a dovetail structure, the wedge-shaped pressure block 2 can only move along the length of the groove and cannot disengage from the wire clamp 1. The clearance groove 21 is used to accommodate the wire passing between the wedge-shaped pressure block 2 and the wire clamp 1. The advance groove 22 penetrates the height direction of the wedge-shaped pressure block 2, so that the self-locking unit 4 can be inserted from the top or the bottom and achieve bidirectional locking.

[0022] Preferably, the wedge-shaped pressure block 2 is a wedge-shaped block that fits into the inclined wall of the wire clamp 1 cavity. The two sides of the wedge-shaped block are planes with the same inclination angle as the locking groove 11, ensuring stable alignment when sliding within the locking groove 11. The clearance groove 21 is a longitudinal groove formed in the wedge-shaped pressure block 2 facing the wire clamp 1, ensuring that when the wedge-shaped pressure block 2 is pushed into the locking groove 11 inside the wire clamp 1, the top member 42 can smoothly slide into the bottom of the push groove 22 of the wedge-shaped pressure block 2. The push groove 22 is a rectangular channel that vertically penetrates the upper and lower end faces of the wedge-shaped pressure block 2, providing movement space for the self-locking unit 4 component within it.

[0023] Preferably, the insulating box 31 is a rectangular box-shaped structure that is closed at the bottom and open at the top and one side. The bottom of its inner cavity is designed with a positioning boss that matches the bottom contour of the wire clamp 1. The inner cavity sidewalls are provided with several longitudinal reinforcing ribs. These ribs contact the outer sidewalls of the wire clamp 1, jointly achieving circumferential positioning and stable support of the wire clamp 1 within the insulating box 31. Recessed snap-fit ​​grooves are formed on the sidewalls of the insulating box 31.

[0024] The top cover 32 is a cover that mates with the open end of the insulating box 31. Its perimeter is designed with an integrally molded, flexible, barbed latch whose shape matches the latching groove on the insulating box 31. When the top cover 32 is closed, its barbed latch slides in and locks tightly within the latching groove. Simultaneously, the inner top surface of the top cover 32 presses against the top of the wire clamp 1, forming a complete enclosure. The bottom outer surface of the top cover 32 is provided with a network of intersecting reinforcing ribs to enhance its local compressive strength.

[0025] Preferably, the self-locking unit 4 enables the advancement and self-locking of the wire clamp 1 and the wedge-shaped pressure block 2, and it operates through the rectangular hole 12 of the wire clamp 1 and the advancement groove 22 of the wedge-shaped pressure block 2. The first limiting member 4 is a ring-shaped component that is fixedly installed through the bottom axis of the insulating box 31.

[0026] The push of the top piece 42 pushes the wedge-shaped pressure block 2 into the locking groove 11 of the wire clamp 1, ensuring that the wire is securely clamped. Under the action of the screw rotation, the top piece 42 moves axially along the push groove 22, pushing the wedge-shaped pressure block 2 into the depth of the locking groove 11, so that it fits tightly against the inclined surface of the inner wall of the wire clamp 1, thereby clamping the wire placed in the relief groove 21.

[0027] Preferably, the second limiting member 43 is also a ring-shaped component that is fixedly installed through the bottom axis of the sealing box 32, ensuring that the outer diameter of the positioning member 44 matches the inner diameter of the second limiting member 43, forming a guide and limiting at the end of the top member 42, preventing the top member 42 from deflecting or detaching from the axis during the advancement process.

[0028] The top part 42 and the positioning part 44 apply pre-tightening force to the self-locking unit 4 from the top and bottom ends respectively, so that the wedge-shaped pressure block 2 slides unidirectionally in the locking groove 11 and presses the wire. When the external force attempts to loosen, the self-locking unit 4 is completely locked through the slot hole to ensure the reliability of the connection.

[0029] When installing the wire, place the wire into the U-shaped cavity of the clamp 1 and position it in front of the clearance groove 21 of the wedge-shaped pressure block 2. Tighten the top member 42, whose trapezoidal thread engages with the first limiting member 41, converting the rotational motion into linear upward motion. The end of the top member 42 pushes against the lower wall of the push groove 22, generating an upward thrust. Since the dovetail-shaped guide rails on both sides of the wedge-shaped pressure block 2 are constrained within the dovetail-shaped locking groove 11 of the clamp 1, this upward thrust is decomposed into a component force that causes the wedge-shaped pressure block 2 to move horizontally into the cavity of the clamp 1, thereby pressing the wire tightly against the inner wall of the clamp 1, completing the initial crimping.

[0030] Subsequently, the positioning component 44 is adjusted so that its end is rotated downwards until it firmly presses against the upper wall of the top component 42. At this point, the wedge-shaped pressure block 2 is clamped between the upward pushing of the top component 42 and the downward pressing of the positioning component 44, forming a bidirectional mechanical limit. This completely eliminates any possible backlash in the wedge-shaped pressure block 2 under conditions such as vibration and thermal expansion and contraction, achieving true self-locking.

[0031] Reference Figure 1 , Figures 3-5 As an optional embodiment, in one embodiment provided by the present invention, the wire clamp 1 further includes a groove 13 formed on one side of its end; The wedge-shaped pressure block 2 also includes a guide strip 23 protruding from its end, and an adjusting member 24 that passes through and engages at the junction of the clearance groove 21 and the propulsion groove 22.

[0032] Furthermore, the insulating box 31 includes a receiving groove 311 for fixing the card wire clamp 1, and a push-in end 312 opened on one side of the receiving groove 311; The receiving groove 311 includes a bottom hole 3111 formed at its end.

[0033] Furthermore, the top box 32 includes a mounting hole 321 opened at the center of its bottom; The capping box 32 and the insulation box 31 include multiple sets of sealing bushings 5 ​​fixedly installed at both ends.

[0034] In this embodiment, a groove 13 is machined on the end side wall of the wire clamp 1. The groove 13 is a straight groove extending along the axial direction of the wire clamp 1. The groove 13 cooperates with the guide strip 23 on the wedge-shaped pressure block 2. Its main function is to circumferentially limit the wedge-shaped pressure block 2 when it is initially inserted into the cavity of the wire clamp 1, to prevent it from deflecting or twisting during the insertion process, and to ensure that its dovetail guide rail can be accurately aligned and smoothly slide into the locking groove 11.

[0035] Correspondingly, a guide strip 23 protrudes from the corresponding end of the wedge-shaped pressure block 2. The shape of the guide strip 23 is complementary to the inverted T-shaped cross-section of the slide groove 13, allowing it to be embedded in the slide groove 13 and slide freely within it. The length of the guide strip 23 is shorter than the body of the wedge-shaped pressure block 2, so that it only plays a guiding role in the initial stage of installation. When the wedge-shaped pressure block 2 is fully slid into the working position, the guide strip 23 disengages from the slide groove 13, and the main load-bearing and guiding functions are undertaken by the locking groove 11 and the dovetail-shaped guide rails on both sides of the wedge-shaped pressure block 2.

[0036] Preferably, the insulating box 31 has an internal receiving groove 311 for fixing the wire clamp 1. The inner wall contour of the receiving groove 311 matches the shape of the wire clamp 1, and a clearance space is opened on the outer side of the end of the wire clamp 1 with the sliding groove 13, forming a push-in end 312. The push-in end 312 is an open entrance area of ​​the receiving groove 311, and its cross-section is slightly larger than the wedge-shaped pressure block 2 body, which facilitates the initial insertion of the wedge-shaped pressure block 2 from this end. At the bottom of the receiving groove 311, corresponding to the position of the bottom rectangular hole 12 after the wire clamp 1 is in place, a bottom hole 3111 is opened. The bottom hole 3111 ensures that the top member 42 has sufficient operating space and can guide its vertical movement.

[0037] Correspondingly, a mounting hole 321 is provided at the center of the bottom of the top box 32. The mounting hole 321 is a circular through hole, and its position corresponds vertically to the bottom hole 3111 at the bottom of the insulation box 31, allowing the rod of the positioning member 44 and the second limiting member 43 to pass through.

[0038] Preferably, to improve the sealing protection level and structural integrity of the entire insulating shell, after the top box 32 and the insulating box 31 are joined together, their ends on both sides are fixed by multiple sets of sealing bushings 5. These sealing bushings 5 ​​are integrally injection molded from an inner metal insert and an outer rubber sealing ring. During installation, the metal insert of the bushing is first passed through the pre-aligned mounting holes on the side walls of the top box 32 and the insulating box 31, and then riveted or tightened from the outside using a special tool, so that the outer rubber ring deforms under pressure and tightly fills the gap of the mounting hole, ensuring that the internal metal components can work stably for a long time in humid and dirty environments.

[0039] The operator can first smoothly place the wire clamp 1 into the receiving groove 311 along the push-in end 312 of the insulating box 31 to complete the initial positioning. Then, accurately align the guide strip 23 at the front end of the wedge-shaped pressure block 2 with the sliding groove 13 at the end of the wire clamp 1, and smoothly push it in axially, so that the dovetail guide rails on both sides gradually embed into the locking groove 11 of the wire clamp 1 until it is fully in place. This guiding structure effectively avoids the wedge-shaped pressure block from deflecting during insertion, significantly improving the accuracy and convenience of installation. At the same time, since the entire installation process is carried out under the protection of the insulating box 31, the operator does not need to directly contact the metal wire clamp 1, thereby completely isolating the risk of electrostatic hazards caused by accidental contact with live parts or induced electricity, ensuring work safety.

[0040] Reference Figures 2-4 , Figure 6 As an optional embodiment, in one embodiment provided by the present invention, the first limiting member 41 includes a limiting end 411 that coincides with the axis of the rectangular hole 12, and a hinge end 412 that protrudes from the rear end of the limiting end 411.

[0041] Furthermore, the top member 42 includes a top block 421 located inside the hinge end 412, a bearing 422 fixedly engaged with the bottom of the top block 421, and a drive rod 423 fixedly engaged with the inside of the bearing 422.

[0042] Furthermore, the top block 421 includes a bevel 4211 protruding from its end and a connecting hole 4212 penetrating the axis of the top block 421.

[0043] Furthermore, the propulsion groove 22 includes a through groove 221 penetrating the end face of the wedge-shaped pressure block 2, and an inclined side 222 formed on one side of the through groove 221; Inclined surface 4211 and inclined side 222 slide together.

[0044] Furthermore, both the second limiting member 43 and the inner side of the hinge end 412 are provided with external threads 51; Positioning component 44 has the same structure as drive rod 423; The positioning component 44 includes a light rod 441 at its front end, a screw 442 protruding from one end of the light rod 441, and a drive end 443 protruding from the other end of the screw 442.

[0045] In this embodiment, the main body of the first limiting member 41 is a stepped shaft-shaped metal component whose axis coincides with the axis of the rectangular hole 12 at the bottom of the clamp 1. The front end of the first limiting member 41 is a limiting end 411, whose outer diameter is clearance-fitted with the shape of the rectangular hole 12, allowing it to partially extend into the hole for initial positioning and anti-rotation. The rear end of the limiting end 411 is coaxially provided with a hinge end 412, which is a cylinder with an outer diameter smaller than that of the limiting end 411. Its outer surface is machined with external threads, and its end is a hexagonal prism for connecting and transmitting with an external socket wrench. The first limiting member 41 is fixedly installed at the bottom of the insulating box 31 through the shoulder at the rear of its limiting end 411 or through a threaded connection, ensuring the stability of its axial position.

[0046] Preferably, the top block 421 is an approximately trapezoidal block structure, with a bevel 4211 machined on the side near the push groove 22. The inclination angle of this bevel is the same as that of the inclined side 222. A connecting hole 4212 is provided through the center of the top block 421 along its axis. This hole is a smooth hole, used to form a slot with the smooth rod 441 at the front end of the positioning member 44 at the upper end, so that the top block 421 restricts the movement of the wedge-shaped pressure block 2.

[0047] A bearing 422, preferably a thrust ball bearing, is fixedly engaged at the bottom of the top block 421 via an interference fit. The outer ring of the bearing 422 is fixed to the bottom of the top block 421. The inner ring of the bearing 422 is also fixedly engaged with the outer circumferential surface of the drive rod 423, which is coaxially fixed with the bearing's inner ring. The rear end of the drive rod 423 has an external thread that engages with the external thread on the inner side of the hinge end 412. Rotating the drive rod 423 allows it to move axially, thereby causing the top block 421 to slide along the inclined side 222 of the push groove 22. This, in turn, pushes the wedge-shaped pressure block 2 to move deeper into the locking groove 11, thus clamping or releasing the wire inside the clamp. When the drive rod 423 rotates, the thread at its rear end engages with the external thread on the inner side of the hinge end 412, generating axial displacement and causing the bearing 422 and the top block 421 fixed thereto to move synchronously. Because the inclined surface 4211 slides into the inclined side 222 in the feed groove 22, the linear motion of the top block 421 is converted into the radial feed motion of the wedge-shaped pressure block 2, thereby pushing it to press the wire to achieve clamping.

[0048] Specifically, a rectangular through-slot 221 is provided through the wedge-shaped pressure block 2, extending from its upper and lower end faces. One sidewall of this through-slot 221, corresponding to one side of the inclined surface 4211 of the top block 421, is machined with a bevel 222. This bevel 222 is not an entire inclined sidewall, but rather a guide bevel formed by cutting the upper or lower edge of the sidewall, with an angle consistent with the inclined surface 4211 of the top block 421. When the top member 42 is pushed, the inclined surface 4211 of the top block 421 will form a high-pair contact and sliding engagement with this bevel 222, converting the axial thrust of the drive rod 423 into a component force that causes the wedge-shaped pressure block 2 to slide along the locking groove 11.

[0049] Preferably, the structure of the second limiting member 43 is similar to that of the hinge end 412 of the first limiting member 41, and its inner side is also provided with an internal thread. It is worth noting that the outer side of the hinge end 412 of the first limiting member 41 is also machined with an external thread, which allows components with the same thread structure to be interchanged or installed symmetrically.

[0050] In this embodiment, the positioning member 44 has the same basic structure as the aforementioned drive rod 423. From front to back, it includes: a front end guide rod 441, a screw 442 protruding from one end of the guide rod 441, and a drive end 443 protruding from the other end of the screw 442. The guide rod 441 is used to form a sliding fit with the connecting hole 4212 of the top block 421; the screw 442 is used to engage with the internal thread of the second limiting member 43, achieving axial displacement through rotation; the drive end 443 is used for tool operation. The end of the drive end 443 is provided with a hexagonal groove, facilitating torque input when engaged with an internal hexagonal socket wrench.

[0051] During installation, the drive rod 423 is screwed on, which pushes the top block 421 forward and upward via the thrust bearing 422. The inclined surface 4211 of the top block 421 contacts and slides with the inclined edge 222 of the push groove 22, generating a normal force perpendicular to the inclined surface. After decomposition, the horizontal component of this force directly drives the wedge-shaped pressure block 2 to move along the dovetail locking groove 11 into the cavity of the wire clamp 1, thereby pressing the wire. The introduction of the thrust bearing 422 decouples the rotational motion of the drive rod 423 from the linear motion of the top block 421, greatly reducing friction and making the operation more effortless and smooth. After the initial pressing is completed, the positioning member 44 is screwed on, and the screw 442 at its front end is screwed into the second limiting member 43, pushing the end of its smooth rod 441 to finally press against the end of the drive rod 423 of the top member 42 or the back of the top block 421. In this way, the top member 42 and the positioning member 44 lock the top block 421 and its associated wedge-shaped pressure block 2 in the pressing position from both the top and bottom directions. This dual locking effectively prevents loosening caused by vibration or thermal expansion and contraction, ensuring long-term stable clamping of the wires.

[0052] Reference Figure 2 , Figure 6 and Figure 7 As an optional embodiment, in one embodiment provided by the present invention, the adjusting member 24 includes a mounting rod 241 fixedly engaged in the shaft hole at the junction of the clearance groove 21 and the propulsion groove 22, a rotating rod 242 hinged to the inner side of the mounting rod 241, and a rotating plate 243 protruding on both sides of the rotating rod 242.

[0053] In this embodiment, the adjusting member 24 is used to prevent the top block from being unable to smoothly enter the through groove 221 due to the misalignment of the through groove 221 and the top block 421 after the wedge-shaped pressure block 2 is first pushed into the locking groove 11, resulting in jamming or misalignment.

[0054] Preferably, the mounting rod 241 is a cylindrical pin, which is press-fitted into a corresponding shaft hole machined on the wedge-shaped pressure block 2 body at the junction of the clearance groove 21 and the propulsion groove 22. The axis of this shaft hole is parallel to the end face of the wedge-shaped pressure block and passes through the adjacent sidewalls of the clearance groove 21 and the propulsion groove 22, serving as the static support foundation for the entire adjusting component 24.

[0055] The rotating rod 242 is a sleeve-shaped component fitted onto the outside of the mounting rod 241, and is internally hinged to the mounting rod 241. This allows the rotating rod 242 to rotate flexibly relative to the stationary mounting rod 241. The outer surface of the rotating rod 242 typically has an annular groove machined in the middle to provide a positioning reference for subsequent components. The rotating plate 243 consists of two symmetrical plate-like structures, protruding from both sides of the outer surface of the rotating rod 242.

[0056] Mounting rod 241 spans between clearance groove 21 and propulsion groove 22. Rotating rod 242 is rotatably supported on mounting rod 241. Two rotating plates 243 are securely connected to both sides of rotating rod 242, located within the space of propulsion groove 22, but their dimensions must ensure that they do not interfere with the inner wall of propulsion groove 22 during rotation.

[0057] The rotating rod 242 of the adjusting component 24 rotates around the mounting rod 241, causing the rotating plates on both sides to adjust their angles synchronously, thereby guiding the through slot 221 to align with the top block 421. This structure ensures that the top block 421 can be smoothly inserted into the through slot 221 during the movement of the wedge-shaped pressure block 2. The limiting effect of the rotating plate can also suppress the lateral displacement of the wedge-shaped pressure block 2 under force, further improving the clamping stability. The rotating plate 243 opens or closes under the action of the rotating rod 242, and its edge forms a dynamic guiding fit with the inner wall of the push groove 22, ensuring that the axis of the through slot 221 is always aligned with the movement trajectory of the top block 421. When the front end of the top block 421 contacts the inclined surface of the rotating plate 243, it pushes open the two rotating plates and slides into the through slot 221 along its guide surface, achieving self-aligning insertion.

[0058] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A self-locking wedge type parallel groove wire clamp, characterized by: The utility model relates to a self-locking wedge type parallel groove wire clamp, including, The wire clamp (1) includes the locking groove (11) set up in the cavity both sides, and the rectangular hole (12) is set up in the bottom of wire clamp (1) through, The wedge-shaped pressing block (2) slides in locking groove (11), The wedge-shaped pressing block (2) includes the avoidance groove (21) set up in its one side, and the propulsion groove (22) is through in the upper and lower end surface of wedge-shaped pressing block (2), The insulating shell (3) includes the insulating box (31) of fixed bearing wire clamp (1), and the end cap box (32) is clamped in the end of insulating box (31), The self-locking unit (4) is slidably clamped in the propulsion groove (22), and the self-locking unit (4) includes the first limiting piece (41) fixedly arranged in the bottom of insulating box (31), the top piece (42) screw connection in the inner side of first limiting piece (41), the second limiting piece (43) fixedly arranged in the bottom of end cap box (32), and the positioning piece (44) screw connection in the inner side of second limiting piece (43).

2. The self-locking wedge type parallel groove wire clamp according to claim 1, wherein: The wire clamp (1) further includes the sliding groove (13) set up in the one side of its end, The wedge-shaped pressing block (2) further includes the guide bar (23) protruding from its end, and the adjusting piece (24) is through clamped in the junction of avoidance groove (21) and propulsion groove (22).

3. The self-locking wedge type parallel groove wire clamp according to claim 1 or 2, wherein: The insulating box (31) includes the containing groove (311) for fixedly clamping the wire clamp (1), and the push-in end (312) is set up in the one side of containing groove (311); The containing groove (311) includes the bottom hole (3111) set up in its end.

4. The self-locking wedge type parallel groove wire clamp according to claim 1, wherein: The end cap box (32) includes the mounting hole (321) set up in the center of its bottom; The end cap box (32) and insulating box (31) include a plurality of sealing shaft sleeves (5) fixedly installed in both sides of the end.

5. The self-locking wedge type parallel groove wire clamp according to claim 1 or 2, wherein: The first limiting piece (41) includes the limiting end (411) coinciding with the axis of the rectangular hole (12), and the hinged end (412) protruding from the rear end of the limiting end (411).

6. The self-locking wedge type parallel groove wire clamp according to claim 5, wherein: The top piece (42) includes the top block (421) limited in the inner side of the hinged end (412), the bearing (422) fixedly clamped in the bottom of the top block (421), and the drive rod (423) fixedly clamped in the inner side of the bearing (422).

7. The self-locking wedge type parallel groove wire clamp according to claim 6, wherein: The top block (421) includes the inclined surface (4211) protruding from its end, and the connecting hole (4212) through the axis of the top block (421).

8. The self-locking wedge type parallel groove wire clamp according to claim 7, wherein: The propelling groove (22) comprises a through groove (221) penetrating the end face of the wedge-shaped briquet (2), and an inclined edge (222) opened on one side of the through groove (221); The inclined surface (4211) is in sliding fit with the inclined edge (222).

9. The self-locking wedge-shaped parallel groove wire clamp according to claim 8, characterized in that: The second limiting member (43) and the inner side of the hinged end (412) are both provided with external threads (51); The positioning member (44) is consistent with the structure of the driving rod (423); The positioning member (44) comprises a polished rod (441) at the front end thereof, a screw rod (442) protruding from one end of the polished rod (441), and a driving end (443) protruding from the other end of the screw rod (442).

10. The self-locking wedge-shaped parallel groove wire clamp according to claim 2, characterized in that: The adjusting member (24) comprises an installation rod (241) fixedly clamped in the shaft hole at the joint of the avoiding groove (21) and the propelling groove (22), a rotating rod (242) hinged to the inner side of the installation rod (241), and rotating plates (243) protruding from both sides of the rotating rod (242).

Images