Grounding copper bar with good fixing effect

Abstract

The utility model discloses a grounding copper bar with a good fixing effect, a spherical head part of the grounding copper bar is embedded into a connecting groove of a top plate of a wire clamp, and the self-centering characteristic of a spherical structure is utilized, so that the axes of the top plate and a bottom plate are automatically corrected in the screwing process, and the top plate and the bottom plate are ensured to always keep coaxial alignment. According to the matching mode, the rotating action is converted into axial pressure in the vertical direction, the first clamping ring and the second clamping ring are promoted to form progressive clamping force, the unbalance loading problem caused by direct pressure bearing of traditional threads is avoided, and uniform force conduction is achieved through spherical surface contact. The displacement range of the top plate is effectively restrained through the limiting design of the connecting groove, structural deformation caused by excessive screwing is prevented, and the requirement for operation torque is greatly reduced through the low friction characteristic of the ball head part. According to the linkage mechanism, an operator only needs to rotate the screw to synchronously complete electrical conduction and mechanical locking, and in a vibration environment, the geometric occlusion of the ball head and the groove can restrain the thread loosening trend, so that the reliability of long-term fixation is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of grounding copper busbar technology, and in particular to a grounding copper busbar with good fixing effect. Background Technology

[0002] Grounding copper busbars, as crucial safety protection devices in power systems, are widely used in substations, distribution cabinets, and electrical equipment. Their core function is to provide a low-impedance grounding path for equipment casings, lightning protection devices, and fault currents, thereby ensuring personnel safety, preventing lightning damage, and maintaining the stable operation of the power system. Traditional grounding copper busbars are typically made of copper or copper-plated metal, with multiple wiring holes on their surface. Grounding wires are fixed to the surface of the copper busbar using bolts or crimping to form a reliable electrical connection. However, as modern power equipment develops towards higher density and higher reliability, the structural design of traditional grounding copper busbars has gradually revealed many technical bottlenecks, making it difficult to meet the requirements for long-term stability and convenient maintenance under complex operating conditions.

[0003] In existing technologies, the fixing of grounding conductors mainly relies on two methods: one is direct bolt crimping, where a bolt and nut are used to press the conductor tightly onto the copper busbar surface; the other is a simple clamp structure, which uses a combination of metal clips and bolts to hold the conductor. However, both methods have significant drawbacks. First, bolt crimping requires high torque control from the operator; insufficient tightening force can lead to increased contact resistance, causing localized overheating or even connection failure; excessive tightening may damage the conductor or strip the copper busbar threads. Second, traditional clamp structures often have a planar clamping surface, limiting the contact area with round conductors. This makes them prone to loosening under vibration or thermal expansion and contraction, leading to fluctuations in grounding resistance and potentially causing equipment to become electrified. Furthermore, existing clamps lack self-adjusting capabilities, making them incompatible with grounding conductors of different diameters, requiring frequent replacement of parts, and increasing construction and maintenance costs.

[0004] More importantly, the anti-slip design of existing grounding copper busbars is generally inadequate. For example, the surface of the copper busbar is mostly a smooth plane or simple stripe treatment, which easily reduces friction in humid or oily environments; the wire clamps and copper busbars lack a mechanical interlocking structure, relying solely on bolt pressure for fixation, which can easily lead to displacement due to material creep or vibration after long-term use. In addition, traditional wiring hole layouts are mostly arranged linearly on one side, resulting in low space utilization. It is difficult to meet the needs of multi-circuit grounding in limited installation areas, and the close spacing between adjacent wires may cause electromagnetic interference or poor heat dissipation. It is clear that existing technology still needs improvement and enhancement. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a grounding copper busbar with good fixing effect to solve the problem of unreasonable fixing method of grounding wire in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a grounding copper busbar with good fixing effect, comprising a copper busbar body and a wiring hole opened on the side wall of the copper busbar body, and further comprising a clamp unit corresponding to the wiring hole. The clamp unit comprises: a locking screw having a threaded section and a ball head, the threaded section being threadedly connected to the top of the copper busbar body, and the ball head being coaxially connected to the end of the threaded section; a clamp top plate having a connecting slot adapted to the ball head at its top and a first clamping ring formed at its bottom; and a clamp bottom plate having a second clamping ring opposite to the first clamping ring, the first clamping ring and the second clamping ring together forming a clamping groove for fixing the grounding wire, the clamping groove being coaxially arranged with the wiring hole.

[0007] In one embodiment of the present invention, the bottom of the wire clamp base plate is provided with an anti-slip protrusion, and the copper busbar body is provided with an anti-slip groove, wherein the anti-slip protrusion is interference-fitted into the anti-slip groove.

[0008] In one embodiment of the present invention, the anti-slip protrusion has a wedge-shaped cross-section and is located directly below the second clamping ring.

[0009] In one embodiment of this utility model, the wiring holes are multiple and arranged linearly at equal intervals along the side wall of the copper busbar body, and the spacing between adjacent wiring holes is 1.2-1.5 times the diameter of the grounding wire.

[0010] In one embodiment of this utility model, the wiring holes are provided on the side walls of both the front and rear sides of the copper busbar body.

[0011] In one embodiment of the present invention, anti-slip teeth are provided on the inner wall of the clamping groove.

[0012] In one embodiment of this utility model, the copper busbar body is provided with a threaded hole, and a bolt for installation and fixing is passed through the threaded hole.

[0013] In one embodiment of this utility model, the bolt is a hexagonal flange bolt with an anti-loosening washer.

[0014] As described above, the grounding copper busbar of this invention, with its excellent fixing effect, has the following beneficial effects: the ball head is embedded in the connecting groove of the top plate of the clamp, utilizing the self-centering characteristic of the spherical structure to automatically correct the axis of the top and bottom plates during tightening, ensuring that they always remain coaxially aligned; the rotational motion is converted into axial pressure in the vertical direction, causing the first and second clamping rings to form a progressive clamping force, which avoids the off-center load problem caused by direct pressure on traditional threads, and achieves uniform force transmission through spherical contact. The limiting design of the connecting groove effectively constrains the displacement range of the top plate, preventing structural deformation caused by over-tightening, while the low friction characteristics of the ball head significantly reduce the operating torque requirement. This linkage mechanism allows the operator to simultaneously complete electrical conduction and mechanical locking simply by rotating the screw, and in a vibration environment, the geometric engagement of the ball head and the groove can suppress the tendency of the thread to loosen, ensuring long-term reliability of the fixation. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A schematic diagram of the structure of the grounding copper busbar with good fixing effect provided by this utility model;

[0017] Figure 2 Another structural schematic diagram of the grounding copper busbar with good fixing effect provided by this utility model;

[0018] Figure 3 for Figure 2 Enlarged view of detail A in the middle;

[0019] Figure 4 A partial structural diagram of the grounding copper busbar with good fixing effect provided by this utility model.

[0020] Component designation explanation

[0021] 1. Copper busbar body; 2. Wiring hole; 3. Wire clamp unit; 31. Locking screw; 311. Threaded section; 312. Ball head; 32. Wire clamp top plate; 321. Connecting slot; 322. First clamping ring; 33. Wire clamp bottom plate; 331. Second clamping ring; 332. Anti-slip ridge; 4. Anti-slip teeth; 5. Bolt. Detailed Implementation

[0022] This utility model provides a grounding copper busbar with good fixing effect. To make the purpose, technical solution and effect of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments. In the description of this utility model, it should be understood that the terms "up, down, left, right" and other indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and should not be construed as limiting this utility model; in addition, the terms "installation" and "connection" should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] Please see Figures 1 to 4 This utility model provides a grounding copper busbar with good fixing effect, including a copper busbar body 1 and a wiring hole 2 opened on the side wall of the copper busbar body 1, and a wire clamp unit 3 corresponding to the wiring hole 2. The wire clamp unit 3 includes: a locking screw 31, having a threaded section 311 and a ball head 312. The threaded section 311 is threaded to the top of the copper busbar body 1, and the ball head 312 is coaxially connected to the end of the threaded section 311; a wire clamp top plate 32, which has a connecting slot 321 adapted to the ball head 312 at the top and a first clamping ring 322 formed at the bottom; and a wire clamp bottom plate 33, which has a second clamping ring 331 opposite to the first clamping ring 322. The first clamping ring 322 and the second clamping ring 331 together form a clamping groove for fixing the grounding wire. The clamping groove is coaxially arranged with the wiring hole 2.

[0024] The bottom of the clamp base plate 33 is provided with an anti-slip protrusion 332, and the copper busbar body 1 is provided with an anti-slip groove. The anti-slip protrusion 332 is interference-fitted into the anti-slip groove. The interference fit between the anti-slip protrusion 332 and the anti-slip groove significantly enhances the connection stability between the clamp base plate 33 and the copper busbar body 1. The wedge-shaped cross-section design further expands the contact area, suppressing slippage of the clamp base plate 33 through mechanical interlocking, and maintaining structural integrity, especially in vibration environments, ensuring long-term fixation. The anti-slip protrusion 332 has a wedge-shaped cross-section and is located directly below the second clamping ring 331. The wedge-shaped anti-slip protrusion 332's layout directly below the second clamping ring 331 optimizes the force transmission path, strengthening the shear resistance of the clamp base plate 33, dispersing the clamping force through local support, avoiding stress concentration leading to material deformation, and further improving anti-slip performance, ensuring that the clamping groove maintains alignment accuracy under high load. In detail, the wedge-shaped anti-slip protrusion 332 can be firmly embedded in the anti-slip groove. Its wedge-shaped inclined surface forms a surface contact interlocking structure with the inner wall of the anti-slip groove, and the elastic deformation generated by the interference fit creates a two-way locking effect. When the wire clamp base plate 33 is subjected to external force, the inclined surface of the wedge-shaped protrusion will generate a vertical supporting reaction force along the side wall of the anti-slip groove, effectively offsetting the lateral shear force. At the same time, the tight fit between the root of the anti-slip protrusion 332 and the copper busbar body 1 can limit the tendency of the base plate to rotate around the axis, thereby suppressing displacement in multiple degrees of freedom. This design significantly improves the bonding strength between the wire clamp base plate 33 and the copper busbar body 1 compared with traditional planar contact, and the wedge angle can be optimized according to the elastic modulus of the material, balancing the embedding tightness and assembly convenience. In addition, the anti-slip convex strip 332 is made of the same copper alloy material as the copper busbar body 1. It is formed by integrated casting or machining, which not only ensures the consistency of the coefficient of thermal expansion, but also avoids the risk of electrochemical corrosion caused by contact between dissimilar materials, further improving the reliability of the grounding system in long-term operation.

[0025] The wiring holes 2 are multiple and arranged linearly at equal intervals along the side wall of the copper busbar body 1, with the spacing between adjacent wiring holes 2 being 1.2-1.5 times the diameter of the grounding wire. This linearly arranged arrangement of wiring holes 2, combined with the matching design of the spacing and the grounding wire diameter, satisfies the parallel installation requirements of multiple grounding wires while avoiding interference from wire compression. The reasonable spacing provides operational space, reduces installation difficulty, ensures electrical clearance safety, and improves overall wiring efficiency. The wiring holes 2 are provided on both the front and rear side walls of the copper busbar body 1. The dual-sided wiring holes 2 expand the selection of wiring directions, adapting to complex installation scenarios. The bidirectional access design balances load distribution, reduces stress accumulation caused by concentrated wiring on one side, and improves the utilization rate of the grounding copper busbar per unit area, optimizing the spatial layout.

[0026] The inner wall of the clamping groove is provided with anti-slip teeth 4. These anti-slip teeth 4 significantly increase the friction between the ground wire and the groove wall through a mechanical interlocking effect, effectively preventing the wire from slipping off under vibration or external impact. The evenly distributed design of the anti-slip teeth 4 ensures uniform force distribution, avoiding localized indentations that could damage the wire insulation layer, thus balancing fixation strength and wire protection. The anti-slip teeth 4 are periodically and evenly distributed on the inner wall of the clamping groove. Each tooth has a trapezoidal protrusion at the bottom connecting to the groove wall, and a semi-circular arc surface with a radius of 0.5-1mm at the top. The tooth height matches the thickness of the ground wire insulation layer, ensuring both piercing the insulation layer to form a microscopic interlocking pattern and avoiding damage to the wire itself. The anti-slip teeth 4 are arranged in a staggered checkerboard pattern along the axial direction of the groove wall, with a lateral spacing of 0.8-1.2 times the ground wire diameter and a longitudinal pitch equal to the tooth width, forming a dense but non-overlapping interlocking network.

[0027] The copper busbar body 1 is provided with threaded holes, through which bolts 5 for installation and fixation are inserted. In another feasible embodiment, the engagement of the threaded holes and bolts 5 provides a standardized installation interface for the copper busbar. The hexagonal flange bolts 5 disperse the tightening force through a large contact area, preventing deformation of the copper busbar. The threaded connection adapts to various installation environments, is easy to operate, and provides a stable connection, facilitating later maintenance and disassembly. The bolts 5 are hexagonal flange bolts with anti-loosening washers. The hexagonal flange bolts 5 with anti-loosening washers eliminate the risk of thread loosening through the self-locking function of the elastic washers. The flange design provides high torque bearing capacity, ensuring that the copper busbar remains stable and fixed even under high-frequency vibration or temperature change environments. The combination of anti-loosening and flange structures significantly improves connection reliability and extends service life.

[0028] The working process of a grounding copper busbar with good fixing effect is as follows: The copper busbar body 1 is fixed to the grounding equipment (such as a distribution cabinet frame) through the threaded holes. Hexagonal flange bolts 5 with anti-loosening washers are passed through the threaded holes and tightened. The flange increases the contact area, evenly distributes pressure, and the anti-loosening washers prevent the bolts 5 from loosening due to vibration. After stripping the insulation layer from the end of the grounding wire, it is inserted into the wiring hole 2 on the side wall of the copper busbar body 1. The wiring holes 2 on the front and rear sides are selected according to the number of grounding wires, and the equidistant design avoids contact between adjacent cables or poor heat dissipation. The anti-slip protrusion 332 of the wedge-shaped section of the clamp base plate 33 is aligned with the anti-slip groove on the copper busbar body 1, and pressed firmly to achieve an interference fit, limiting lateral displacement. The connecting slot 321 of the clamp top plate 32 is fitted into the ball head 312 of the locking screw 31. Utilizing the ball joint structure, the clamp top plate 32 can adaptively deflect with the angle of the grounding wire, such as tilting or bending, ensuring a tight fit between the clamping groove and the grounding wire. Rotating the locking screw 31, the threaded section 311 is screwed downwards into the copper busbar body 1, pushing the first clamping ring 322 of the clamp top plate 32 and the second clamping ring 331 of the clamp bottom plate 33 to close, forming a coaxial clamping groove. The anti-slip teeth 4 on the inner wall of the clamping groove bite into the surface of the grounding wire, increasing friction and preventing the cable from slipping. The locking screw 31 continuously applies pressure, making the clamping groove evenly press the grounding wire, while the ball head 312 maintains angular flexibility to avoid excessive compression that could deform the cable. The anti-slip protrusion 332 and the wedge-shaped groove further lock the clamp bottom plate 33, preventing the clamping groove from shifting due to vibration.

[0029] In summary, the grounding copper busbar of this invention, with its excellent fixing effect, significantly improves the fixing effect and reliability of the grounding wire through the coordinated design of the clamp unit 3 and the wiring hole 2. The locking screw 31 in the clamp unit 3 uses a ball head 312 to engage with the connecting slot 321 of the clamp top plate 32, allowing the top and bottom plates to automatically align and generate axial pressure during tightening, forcing the clamping groove formed by the first clamping ring 322 and the second clamping ring 331 to tightly clamp the grounding wire. This structure, through mechanical linkage, converts the rotational motion of the screw into a stable axial clamping force, effectively avoiding the loosening problem caused by vibration or external force during traditional screw fixing. The coaxial design of the clamping groove and the wiring hole 2 ensures precise alignment of the grounding wire during insertion, reducing the risk of misalignment. Simultaneously, the symmetrical pressure application of the double clamping rings ensures uniform force on the grounding wire, avoiding localized pressure marks that could damage the conductor, and enhancing conductivity stability by increasing the contact area. Furthermore, the modular design of the wire clamp unit 3 simplifies the installation process. The operator only needs to rotate the locking screw 31 to simultaneously complete the electrical connection and mechanical fixation, significantly improving construction efficiency and reliability. Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0030] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this utility model, and all such substitutions or changes should fall within the protection scope of this utility model.

Claims

1. A grounding copper busbar with good fixing effect, comprising a copper busbar body (1) and a wiring hole (2) opened on the side wall of the copper busbar body (1), characterized in that, It also includes a wire clamp unit (3) corresponding to the wiring hole (2), the wire clamp unit (3) comprising: The locking screw (31) has a threaded section (311) and a ball head (312), wherein the threaded section (311) is threaded to the top of the copper busbar body (1), and the ball head (312) is coaxially connected to the end of the threaded section (311); The top plate (32) of the wire clamp has a connecting slot (321) at the top that is adapted to the ball head (312), and a first clamping ring (322) is formed at the bottom; The base plate (33) of the wire clamp is provided with a second clamping ring (331) opposite to the first clamping ring (322). The first clamping ring (322) and the second clamping ring (331) together form a clamping groove for fixing the grounding wire. The clamping groove is coaxially arranged with the wiring hole (2).

2. The grounding copper busbar with good fixing effect according to claim 1, characterized in that, The bottom of the wire clamp base plate (33) is provided with an anti-slip protrusion (332), and the copper busbar body (1) is provided with an anti-slip groove. The anti-slip protrusion (332) is interference-fitted into the anti-slip groove.

3. The grounding copper busbar with good fixing effect according to claim 2, characterized in that, The anti-slip ridge (332) has a wedge-shaped cross section and is located directly below the second clamping ring (331).

4. The grounding copper busbar with good fixing effect according to claim 1, characterized in that, The wiring holes (2) are multiple and are arranged linearly at equal intervals along the side wall of the copper busbar body (1). The spacing between adjacent wiring holes (2) is 1.2-1.5 times the diameter of the grounding wire.

5. The grounding copper busbar with good fixing effect according to claim 4, characterized in that, The copper busbar body (1) has wiring holes (2) on both the front and rear side walls.

6. The grounding copper busbar with good fixing effect according to claim 1, characterized in that, The inner wall of the clamping groove is provided with anti-slip teeth (4).

7. The grounding copper busbar with good fixing effect according to claim 1, characterized in that, The copper busbar body (1) is provided with a threaded hole, and a bolt (5) for installation and fixing is passed through the threaded hole.

8. The grounding copper busbar with good fixing effect according to claim 7, characterized in that, The bolt (5) is a hexagonal flange bolt with anti-loosening washers.

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