Ground bus for low voltage switchgear

Abstract

The utility model discloses a kind of ground bus for low voltage switch, including support, the support is equipped with conducting rack;First sliding slot is equipped on the conducting rack, and wiring terminal is installed on the first sliding slot;The wiring terminal includes screw rod and conducting plate, by bottom plate to limit the inner side of first sliding slot with the one end of screw rod;The one end of screw rod passes through first sliding slot and conducting plate and is adapted to connect with nut, and by tightening nut to fix ground wire on the conducting plate.Due to the sliding installation of electrical connection terminal in first sliding slot, so that the position of wiring terminal can be freely adjusted, and when adjusting, the tightening of nut is used to fix ground wire between conducting plate and nut, then the circuit conduction between ground wire and conducting rack is realized using conducting plate, first, the replacement of conducting plate is simple and convenient;Second, direct friction between ground wire and conducting rack can also be avoided during the tightening process of nut, so the service life of conducting rack can be prolonged.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage switchgear technology, specifically to a grounding busbar for low-voltage switches. Background Technology

[0002] The grounding busbars currently on the market typically have internally threaded holes drilled in a copper plate, and then bolts are used to connect to the internally threaded holes to fix the grounding wire to the busbar. For specific structures, please refer to the prior art with announcement number CN219458236U or announcement number CN205790440U. Since the internally threaded holes on the busbar are factory-configured, their positions are difficult to adjust effectively according to actual needs. Utility Model Content

[0003] The purpose of this invention is to provide a grounding busbar for low-voltage switches to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a grounding busbar for a low-voltage switch, comprising a bracket, wherein a conductive frame is provided on the bracket; a first sliding groove is provided on the conductive frame, and a terminal block is installed on the first sliding groove; the terminal block includes a screw located inside the first sliding groove and a conductive plate located outside the first sliding groove, and a base plate is provided to limit one end of the screw to the inside of the first sliding groove; one end of the screw passes through the first sliding groove and the conductive plate and is adapted to be connected to a nut, and the grounding wire is fixed on the conductive plate by tightening the nut.

[0005] As a preferred technical solution of this utility model: the conductive frame is further provided with a second sliding groove for guiding the sliding of the terminal block.

[0006] As a preferred technical solution of this utility model: the side of the base plate facing the first slide groove is also provided with a spring pad.

[0007] As a preferred technical solution of this utility model: both the conductive plate and the base plate are annular, and extension plates are symmetrically arranged in the radial direction of both the conductive plate and the base plate.

[0008] As a preferred technical solution of this utility model: the cross-section of the conductive frame is a rectangle with an opening, and both ends of the conductive plate are provided with connecting plates.

[0009] As a preferred technical solution of this utility model, both the conductive plate and the conductive frame are made of copper plates.

[0010] The beneficial effects of this utility model by adopting the above technical solution are as follows: Since the electrical terminal is slidably installed in the first groove, the position of the terminal can be freely adjusted. After adjustment, the grounding wire is fixed between the conductive plate and the nut by tightening the nut. Then, the conductive plate is used to realize the circuit connection between the grounding wire and the conductive frame. First, the conductive plate is simple and convenient to replace, and even if the grounding wire sparks, it will not burn the conductive frame. Second, the direct friction between the grounding wire and the conductive frame can be avoided during the tightening of the nut, thus extending the service life of the conductive frame. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is an exploded view of the terminal block of this utility model; Figure 3 This is a cross-sectional structural diagram of the conductive frame of this utility model; Figure 4 This is a schematic diagram of the main structure of the conductive plate of this utility model.

[0012] In the diagram: 1. Bracket; 2. Conductive frame; 3. Terminal block; 30. Screw; 31. Spring washer; 32. Conductive plate; 33. Nut; 34. Base plate; 35. Extension plate; 4. First slide groove; 5. Second slide groove; 6. Connecting plate. Detailed Implementation

[0013] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "upper surface," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this utility model.

[0014] Please see Figure 1-4This utility model provides an embodiment of a grounding busbar for a low-voltage switch, comprising a bracket 1, on which a conductive frame 2 is provided; the conductive frame 2 is provided with a first sliding groove 4, and a terminal block 3 is installed on the first sliding groove 4; the terminal block 3 includes a screw 30 located inside the first sliding groove 4 and a conductive plate 32 located outside the first sliding groove 4, and a base plate 34 is provided to limit one end of the screw 30 to the inside of the first sliding groove 4; one end of the screw 30 passes through the first sliding groove 4 and the conductive plate 32 and is adapted to be connected to a nut 33, and the grounding wire is fixed on the conductive plate 32 by tightening the nut 33.

[0015] In summary, since the terminal 3 is slidably installed in the first groove 4, the position of the terminal 3 can be freely adjusted. After adjustment, the grounding wire is fixed between the conductive plate 32 and the nut 33 by tightening the nut 33. The conductive plate 32 is then used to make the circuit between the grounding wire and the conductive frame 2. Firstly, the conductive plate 32 is easy to replace, and even if the grounding wire sparks, it will not burn the conductive frame. Secondly, the tightening of the nut 33 can also avoid direct friction between the grounding wire and the conductive frame 2, thus extending the service life of the conductive frame.

[0016] Furthermore, since the conductive frame 2 is also provided with a second sliding groove 5 for guiding the sliding of the terminal block 3, more terminal blocks 3 can be integrated on the conductive frame 2, and the position of the terminal block 3 in each sliding groove can be moved freely. Therefore, the device can achieve free position adjustment while integrating more terminal blocks 3, which meets the user's needs and makes it convenient for the user to connect the connecting wire to the conductive frame 2.

[0017] Based on the above solution, since the bottom plate 34 is provided with a spring washer 31 on the side facing the first slide groove 4, the spring washer 31 can provide a continuous preload after the nut 33 is tightened, so as to avoid the grounding wire from becoming loose due to the loosening of the nut 33. In addition, when the nut 33 is tightened, the position of the terminal 3 on the conductive frame 2 can be maintained for a long time under the joint action of the spring washer 31, so that the terminal 3 will not be displaced on the conductive frame 2.

[0018] Furthermore, since both the conductive plate 32 and the base plate 34 are annular, and extension plates 35 are symmetrically arranged in the radial direction of both the conductive plate 32 and the base plate 34, the contact area between the conductive plate 32 and the conductive frame 2 can be increased. This facilitates heat dissipation, effectively prevents the copper lug on the grounding wire from contacting the conductive frame 2, and reduces the possibility of deformation of the conductive frame 2 when the nut 33 is tightened.

[0019] In addition, since the cross-section of the conductive frame 2 is a rectangle with an opening, it is convenient for the terminal block 3 to be installed on the conductive frame 2 from the opening side. At the same time, both ends of the conductive plate 2 are provided with connecting plates 6, which can be connected to the bracket 1 by fasteners such as bolts through the connecting plates to fix the conductive frame 2 on the bracket 1. Conversely, disassembling the bolts and other fasteners makes it convenient to disassemble and replace the conductive frame 2.

[0020] Since both the conductive plate 32 and the conductive frame 2 are made of copper, other parts besides the conductive frame 2 and the conductive plate 32, such as the bracket 1 and the screw 30, can be made of non-copper materials while ensuring the smooth operation of the circuit. This reduces the amount of copper used in the device and thus reduces the cost of using the busbar.

[0021] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A grounding busbar for a low-voltage switch, characterized in that: Includes a support (1), on which a conductive frame (2) is provided; The conductive frame (2) is provided with a first sliding groove (4), and a wiring terminal (3) is installed on the first sliding groove (4); The terminal block (3) includes a screw (30) located inside the first groove (4) and a conductive plate (32) located outside the first groove (4), and a base plate (34) is provided to limit one end of the screw (30) to the inside of the first groove (4); One end of the screw (30) passes through the first groove (4) and the conductive plate (32) and is adapted to the provided nut (33), and the grounding wire is fixed on the conductive plate (32) by tightening the nut (33).

2. The grounding busbar for a low-voltage switch according to claim 1, characterized in that: The conductive frame (2) is also provided with a second groove (5) for guiding the sliding of the terminal block (3).

3. A grounding busbar for a low-voltage switch according to claim 1 or 2, characterized in that: The bottom plate (34) facing the first slide groove (4) is also provided with a spring pad (31).

4. A grounding busbar for a low-voltage switch according to claim 2, characterized in that: Both the conductive plate (32) and the base plate (34) are annular, and extension plates (35) are symmetrically arranged in the radial direction of both the conductive plate (32) and the base plate (34).

5. A grounding busbar for a low-voltage switch according to claim 4, characterized in that: The conductive frame (2) has a rectangular cross-section with an opening, and both ends of the conductive plate (32) are provided with connecting plates (6).

6. A grounding busbar for a low-voltage switch according to claim 5, characterized in that: Both the conductive plate (32) and the conductive frame (2) are made of copper plates.

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