Electrode contact structure, clamping device and circuit breaker testing apparatus

Abstract

The utility model provides an electrode contact structure, clamping device and circuit breaker testing equipment relates to circuit breaker testing equipment technical field. The electrode contact structure is used with the support component of circuit breaker testing equipment cooperation and holds the busbar of the circuit breaker to be tested, including drive part and first electrode piece, first electrode piece is connected with drive part through hinge pin, drive part can drive first electrode piece is close to the busbar of circuit breaker to be tested and rotates around the axis of hinge pin, to make the contact surface of first electrode piece and the one side of busbar fit, and the second electrode piece of support component is arranged on the other side of busbar, and first electrode piece and second electrode piece hold busbar to realize electrically conductive. The above-mentioned electrode contact structure can improve the flexibility and reliability of the process of fitting with busbar and reduce the volume at the same time.

Description

Technical Field

[0001] This utility model relates to the technical field of circuit breaker testing equipment, and more specifically, to an electrode contact structure, a clamping device, and circuit breaker testing equipment. Background Technology

[0002] In the production process of frame circuit breakers, high-current testing is a crucial step in verifying their conductivity and safety. During high-current testing, the busbars of the circuit breaker need to be clamped using a clamping device to ensure electrical continuity between the testing equipment and the circuit breaker.

[0003] Existing clamping devices typically require multiple cylinders, each driving the upper and lower contacts to open and close, clamping a corresponding busbar. However, such clamping devices require an additional number of cylinders for each additional test busbar, increasing the system size. Furthermore, existing clamping devices cannot accommodate busbars with different center distances, necessitating readjustment when changing products. Additionally, the curved clamping surfaces of the upper and lower contacts result in insufficient contact area with the busbar, leading to concentrated heat generation. Under high current conditions, this can easily cause localized overheating, further increasing contact resistance and the resistance of the busbar itself, thus affecting test accuracy. Utility Model Content

[0004] The purpose of this invention is to provide an electrode contact structure, clamping device, and circuit breaker testing equipment, which can improve the flexibility of the clamping process, reduce the size, and improve the accuracy of the test results.

[0005] The embodiments of this utility model are implemented as follows: In one aspect, this utility model provides an electrode contact structure for cooperating with a support component of a circuit breaker testing device to clamp the busbar of a circuit breaker under test. The structure includes a drive unit and a first electrode plate, which is connected to the drive unit via a hinge pin. The drive unit can drive the first electrode plate to approach the busbar of the circuit breaker under test and rotate it around the axis of the hinge pin so that the contact surface of the first electrode plate is in contact with one side of the busbar. A second electrode plate of the support component is disposed on the other side of the busbar, and the first electrode plate and the second electrode plate cooperate to clamp the busbar to achieve electrical conduction.

[0006] Optionally, an elastic element is provided between the first electrode plate and the driving part. When the first electrode plate rotates around the axis of the hinge pin so that its contact surface is in contact with one side of the busbar, the elastic element is used to provide a pre-tightening force to the first electrode plate to press against the busbar.

[0007] Optionally, the driving end of the driving unit is connected to a first connecting plate, the first connecting plate is located between the first electrode sheet and the driving unit, and the first electrode sheet is connected to the first connecting plate through a hinge pin; the driving unit drives the first electrode sheet to move by pushing the first connecting plate; the first connecting plate includes a plate body and two limiting plates respectively disposed at a distance from each other on both sides of the plate body; the hinge pin passes through the first electrode sheet and its two ends are respectively connected to the two limiting plates.

[0008] Optionally, the first electrode sheet has an oblong hole opened along the axial direction of the hinge pin, the hinge pin passes through the oblong hole, and the oblong hole is used to limit the swing amplitude of the first electrode sheet around the hinge pin.

[0009] Optionally, the drive end of the drive unit is provided with a floating connector; it also includes a second connecting plate, through which the drive end passes, so that the floating connector is located between the second connecting plate and the first connecting plate and is connected to the first connecting plate. An insulating pad is attached to the side of the first connecting plate opposite to the first electrode sheet.

[0010] Optionally, the driving unit is a cylinder, the telescopic end of the cylinder passes through the second connecting plate and moves relative to the second connecting plate; the second connecting plate is provided with at least one guide shaft along the telescopic direction of the cylinder, the guide shaft is used to guide the movement of the telescopic end of the cylinder.

[0011] Optionally, there are multiple first electrode plates, which are sequentially attached and arranged along the axis of the hinge pin; each first electrode plate is connected to an output terminal to enable electrical connection between the first electrode plate and the busbar.

[0012] In another aspect, this utility model provides a clamping device, including a support assembly and an electrode contact structure; the support assembly includes a support plate and a second electrode piece movably disposed on the support plate, the contact surface of the second electrode piece is disposed opposite to the contact surface of the first electrode piece of the electrode contact structure, and the first electrode piece and the second electrode piece are driven to attach to opposite sides of the busbar of the circuit breaker to be tested, so as to clamp the busbar and realize electrical conduction.

[0013] Optionally, the second electrode plate is connected to the support plate via a hinge pin. The second electrode plate can rotate along the axis of the hinge pin so that the contact surface of the second electrode plate is parallel to and electrically connected to the side of the busbar opposite to the first electrode plate.

[0014] In another aspect, this utility model provides a circuit breaker testing device, including a clamping device. The first electrode plate and the second electrode plate of the clamping device are driven to move toward the busbar of the circuit breaker to be tested, and are respectively attached to the opposite sides of the circuit breaker to be tested to clamp the busbar.

[0015] The beneficial effects of this utility model include at least one of the following: This application provides an electrode contact structure for clamping the busbar of a circuit breaker under test in conjunction with a support assembly of a circuit breaker testing device. The structure includes a drive unit and a first electrode plate, which is connected to the drive unit via a hinge pin. The drive unit can drive the first electrode plate to approach the busbar of the circuit breaker under test and rotate it around the axis of the hinge pin, so that the contact surface of the first electrode plate is in contact with one side of the busbar. Even if the center distance of the busbars of different circuit breakers under test is different, the hinge pin ensures that the first electrode plate remains firmly in contact with one side of the busbar, improving the reliability of the contact and the accuracy of subsequent test results. Furthermore, compared to the prior art where each clamping part requires a corresponding drive unit, this application only requires one drive unit, simply increasing the number of first electrode plates, significantly reducing the required volume. The second electrode plate of the support assembly is located on the other side of the busbar, and the first and second electrode plates cooperate to clamp the busbar to achieve electrical conduction. By configuring the electrode plates, surface contact with the side of the busbar can be achieved. Compared to the prior art that uses upper and lower contacts for end clamping, the configuration of this application increases the contact area with the busbar, reduces the possibility of localized overheating, and thus improves test accuracy. The aforementioned electrode contact structure can reduce volume while improving the flexibility and reliability of the busbar bonding process.

[0016] This application also provides a clamping device, including a support assembly and an electrode contact structure. The support assembly includes a support plate and a second electrode piece movably disposed on the support plate. The contact surface of the second electrode piece is opposite to the contact surface of the first electrode piece of the electrode contact structure. The first and second electrode pieces are driven to attach to opposite sides of the busbar of the circuit breaker under test, respectively, to clamp the busbar and achieve electrical conduction. The above-mentioned clamping device achieves surface contact between opposite sides of the busbar through the cooperation of the second electrode piece and the first electrode piece of the electrode contact structure, thereby reducing the size of the device while further improving clamping reliability and flexibility.

[0017] This application also provides a circuit breaker testing device, including a clamping device. A first electrode plate and a second electrode plate of the clamping device are driven to move towards the busbar of the circuit breaker under test, and are respectively attached to opposite sides of the circuit breaker under test to clamp the busbar. The aforementioned circuit breaker testing device, through the clamping device, achieves miniaturization, can flexibly adapt to busbars with different center distances, and reduces the possibility of overheating in localized areas of the busbar, thereby improving testing accuracy. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 One of the schematic diagrams of the electrode contact structure provided in the embodiment of this utility model; Figure 2 This is the second schematic diagram of the electrode contact structure provided in the embodiment of the present utility model; Figure 3 An exploded view of the electrode contact structure provided in an embodiment of this utility model; Figure 4 This is a schematic diagram of the clamping device provided in an embodiment of the present invention.

[0020] Icons: 100 - Electrode contact structure; 110 - Drive unit; 111 - First connecting plate; 1111 - Plate body; 1111a - Limiting hole; 1112 - Limiting plate; 112 - Floating joint; 113 - Second connecting plate; 114 - Insulating pad; 115 - Guide shaft; 1151 - Oil-free bushing; 116 - U-shaped support; 120 - First electrode piece; 121 - Outlet end; 122 - Waist-shaped hole; 130 - Hinge pin; 140 - Elastic element; 150 - Bearing plate; 200 - Clamping device; 210 - Support assembly; 211 - Support plate; 212 - Second electrode piece; 300 - Circuit breaker under test; 310 - Busbar. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Please refer to Figure 1 , Figure 2 and Figure 3 This embodiment provides an electrode contact structure 100 for cooperating with the support assembly 210 of the circuit breaker testing equipment to clamp the busbar 310 of the circuit breaker 300 to be tested. It includes a drive unit 110 and a first electrode plate 120. The first electrode plate 120 is connected to the drive unit 110 through a hinge pin 130. The drive unit 110 can drive the first electrode plate 120 to approach the busbar 310 of the circuit breaker 300 to be tested and rotate around the axis of the hinge pin 130 so that the contact surface of the first electrode plate 120 is in contact with one side of the busbar 310. The second electrode plate 212 of the support assembly 210 is disposed on the other side of the busbar 310. The first electrode plate 120 and the second electrode plate 212 cooperate to clamp the busbar 310 to achieve electrical conduction.

[0026] Specifically, such as Figure 1As shown, the electrode contact structure 100 includes a driving part 110 and a first electrode piece 120 disposed at the driving end of the driving part 110. The driving end can drive the first electrode piece 120 to move closer to or away from the outer surface of the busbar 310 of the circuit breaker 300 under test. Optionally, the driving part 110 is a cylinder, and the first electrode piece 120 is located at the extension end of the cylinder. The cylinder can drive the first electrode piece 120 to move linearly through the extension end to move closer to or away from the busbar 310 of the circuit breaker 300 under test.

[0027] like Figure 1 and Figure 2 As shown, the first electrode plate 120 is connected to the driving unit 110 via a hinge pin 130. When the driving end drives the first electrode plate 120 to move until it contacts the outer surface of the busbar 310, the first electrode plate 120 can rotate around the axis of the hinge pin 130 with the hinge point as the rotation center. At this time, the first electrode plate 120 can swing around the hinge point until the contact angle of the first electrode plate 120 matches that of the busbar 310, so that its contact surface is in contact with the outer surface of the busbar 310, thus achieving tight contact between the first electrode plate 120 and the busbar 310. Compared with the existing clamping part with a fixed clamping position, this application improves the flexibility of the contact position between the first electrode plate 120 and the busbar 310 and improves the contact reliability by using the connection method of the first electrode plate 120 with the hinge pin 130.

[0028] Optionally, such as Figure 1 As shown, there are multiple first electrode plates 120, which are sequentially attached and arranged along the axial direction of the hinge pin 130. Each first electrode plate 120 is connected to a lead-out terminal 121, which is used to electrically connect the first electrode plate 120 to the test power supply device, so that the first electrode plate 120 is electrically conductive when it is attached to the busbar 310, thus ensuring the reliability of the test process.

[0029] Existing busbar clamping methods involve each busbar being held by a clamping part, and each clamping part being driven by a corresponding cylinder. Therefore, as the number of busbars increases, the number of cylinders needs to be increased accordingly, resulting in an increase in the size of the circuit breaker testing equipment. In contrast, this application only uses a single driving part 110 to drive multiple electrode plates. Even if the number of busbars 310 increases, only the number of first electrode plates 120 needs to be increased accordingly, ensuring the miniaturization of the equipment.

[0030] The support assembly 210 of the circuit breaker testing equipment is provided with a second electrode 212 corresponding to the first electrode 120. When the first electrode 120 is in close contact with the outer side of the busbar 310, the second electrode 212 can be in close contact with the inner side of the busbar 310, so that the first electrode 120 and the second electrode 212 cooperate to clamp the busbar 310 to achieve electrical conduction.

[0031] It should be noted that, in one possible implementation of this application, such as Figure 2 As shown, an elastic element 140 is provided between the first electrode plate 120 and the drive unit 110. When the first electrode plate 120 rotates around the axis of the hinge pin 130 so that its contact surface is in contact with one side of the busbar 310, the elastic element 140 is used to provide a pre-tightening force to the first electrode plate 120 to press against the busbar 310.

[0032] Specifically, such as Figure 2 As shown, in order to ensure that the first electrode plate 120 is in close contact with the outer side of the busbar 310, an elastic element 140 is provided on the side of the first electrode plate 120 away from the contact surface. The energy release direction of the elastic element 140 is in the same direction as the driving direction of the driving part 110, and the elastic element 140 can provide force to the first electrode plate 120. Under the action of the elastic element 140, the first electrode plate 120 can be rotated more flexibly along the axis of the hinge pin 130 in conjunction with the hinge pin 130. Furthermore, when the first electrode plate 120 is in close contact with the busbar 310, the elastic element 140 can provide a pre-tightening force to the first electrode plate 120 to press against the busbar 310, further improving the reliability of the contact between the first electrode plate 120 and the busbar 310.

[0033] Preferably, the elastic element 140 is a spring; such as Figure 3 As shown, the number of elastic elements 140 can be multiple, corresponding to the number of first electrode pieces 120. Each first electrode piece 120 is provided with an elastic element 140 between it and the driving part 110, ensuring that each first electrode piece 120 can be tightly attached to the busbar 310.

[0034] The aforementioned electrode contact structure 100 is used to cooperate with the support assembly 210 of the circuit breaker testing equipment to clamp the busbar 310 of the circuit breaker 300 under test. It includes a drive unit 110 and a first electrode plate 120, which is connected to the drive unit 110 via a hinge pin 130. The drive unit 110 can drive the first electrode plate 120 to approach the busbar 310 of the circuit breaker 300 under test and rotate it around the axis of the hinge pin 130, so that the contact surface of the first electrode plate 120 is in contact with one side of the busbar 310, even if the center distances of the busbars 310 of different circuit breakers 300 under test are different. The hinge pin 130 ensures that the first electrode 120 remains firmly attached to one side of the busbar 310, improving the reliability of the fit and the accuracy of subsequent test results. Furthermore, compared to existing technologies where each clamping part requires a corresponding drive unit 110, this application only requires one drive unit, simply increasing the number of first electrode 120s, significantly reducing the required volume. The second electrode 212 of the support assembly 210 is located on the other side of the busbar 310, and the first electrode 120 and the second electrode 212 cooperate to clamp the busbar 310 to achieve electrical conductivity. The electrode arrangement enables surface contact with the side of the busbar 310. Compared to existing technologies that use upper and lower contacts for clamping, this application's arrangement increases the contact area with the busbar 310, reducing the possibility of localized overheating and thus improving test accuracy. The aforementioned electrode contact structure 100 improves the flexibility and reliability of the fit with the busbar 310 while reducing volume.

[0035] For example, such as Figure 2 and Figure 3 As shown, the driving end of the driving unit 110 is connected to a first connecting plate 111. The first connecting plate 111 is located between the first electrode plate 120 and the driving unit 110, and the first electrode plate 120 is connected to the first connecting plate 111 via a hinge pin 130. The driving unit 110 drives the first electrode plate 120 to move by pushing the first connecting plate 111. The first connecting plate 111 includes a plate body 1111 and two limiting plates 1112 that are respectively spaced apart on both sides of the plate body 1111. The hinge pin 130 passes through the first electrode plate 120 and its two ends are respectively connected to the two limiting plates 1112.

[0036] Specifically, such as Figure 2 and Figure 3 As shown, the driving end of the driving unit 110 also has a first connecting plate 111. The first connecting plate 111 is used to provide support for the first electrode sheet 120. The first electrode sheet 120 is disposed on the side of the first connecting plate 111 away from the driving end of the driving unit 110. The driving unit 110 can drive the first electrode sheet 120 to move closer to or away from the outer side of the busbar 310 through the first connecting plate 111.

[0037] Figure 3As shown, the first connecting plate 111 includes a plate body 1111 and two limiting plates 1112. The two opposite ends of the hinge pin 130 are respectively connected to the two limiting plates 1112 so that the axial direction of the hinge pin is perpendicular to the driving direction of the driving end. In a specific embodiment of this application, there are two hinge pins 130. Correspondingly, the first electrode plate 120 is provided with a mounting hole and a waist-shaped hole 122 along the axial direction of the two hinge pins 130. The two hinge pins 130 pass through the mounting hole and the waist-shaped hole 122 of the first electrode plate 120 respectively. The hinge pin 130 passing through the mounting hole serves as the rotation center of the first electrode plate 120, and the diameter of the waist-shaped hole 122 is larger than the outer diameter of the hinge pin 130 to provide a certain rotation space for the first electrode plate 120, thereby limiting the swing amplitude of the first electrode plate 120 around the hinge pin 130.

[0038] like Figure 2 and Figure 3 As shown, the elastic element 140 is disposed between the two limiting plates 1112. One end of the elastic element 140 abuts against the first connecting plate 111, and the other end abuts against the first electrode sheet 120. To further improve the stability of the elastic element 140, the first connecting plate 111 is provided with a limiting hole 1111a corresponding to the elastic element 140. One end of the elastic element 140 can be locked in the limiting hole 1111a to prevent the elastic element 140 from falling off due to the movement of the first electrode sheet 120.

[0039] The first connecting plate 111 improves the motion stability of the first electrode 120; when there are multiple first electrode 120s, the motion synchronization of the multiple first electrode 120s can be further improved, thus improving the testing efficiency.

[0040] Optionally, such as Figure 2 and Figure 3 As shown, an insulating pad 114 is attached to the side of the first connecting plate 111 that is opposite to the first electrode plate 120.

[0041] In high-current testing of circuit breakers, if the first electrode 120 is in contact with the metal frame of the circuit breaker structure, it could cause an operator to come into contact with the equipment casing and suffer an electric shock. Furthermore, the high current could easily burn out the control system circuit of the circuit breaker testing equipment. Therefore, the electrode contact structure 100 of this application has an insulating pad 114 on the side of the first connecting plate 111 facing away from the first electrode 120, thereby blocking the current flow path to the circuit breaker testing equipment and improving the safety and reliability of the testing process.

[0042] Preferably, in order to ensure the insulation effect, the area of ​​the insulating pad 114 is not less than the area of ​​the surface of the first connecting plate 111.

[0043] Furthermore, such as Figure 2 and Figure 3As shown, the driving end of the driving unit 110 is provided with a floating connector 112; it also includes a second connecting plate 113, through which the driving end passes, so that the floating connector 112 is located between the second connecting plate 113 and the first connecting plate 111 and is connected to the first connecting plate 111.

[0044] Specifically, in order to improve the motion stability of the first electrode 120, the drive unit 110 also includes a second connecting plate 113. The drive end passes through the second connecting plate 113 to drive the first connecting plate 111 and the first electrode 120 to move. The second connecting plate 113 can provide a certain support for the drive end and reduce the vibration when the drive end moves.

[0045] The drive end is provided with a floating joint 112, which is connected to the side of the first connecting plate 111 opposite to the first electrode plate 120. It can combine its own floating characteristics to ensure that the driving force is mainly transmitted to the first connecting plate 111 along the axial direction of the drive end, reducing the lateral component force, thereby further ensuring the stability of the contact between the first electrode plate 120 and the outer side of the busbar 310.

[0046] Among them, such as Figure 2 and Figure 3 As shown, a U-shaped support portion 116 is provided on the side of the second connecting plate 113 away from the driving portion 110. The driving end of the driving portion 110 passes through the second connecting plate 113, so that the floating connector 112 located at the end of the driving end can be locked in the U-shaped support portion 116, thereby reducing the floating of the floating connector 112 and improving the motion stability of the first electrode sheet 120.

[0047] Optionally, the drive unit 110 is a cylinder, and the telescopic end of the cylinder passes through the second connecting plate 113 and moves relative to the second connecting plate 113; for example... Figure 1 , Figure 2 and Figure 3 As shown, at least one guide shaft 115 is provided on the second connecting plate 113 along the extension and retraction direction of the cylinder. The guide shaft 115 is used to guide the movement of the extension and retraction end of the cylinder.

[0048] Specifically, such as Figure 1 , Figure 2 and Figure 3 As shown, the guide shaft 115 passes through the second connecting plate 113 along the extension and retraction direction of the cylinder. One end of the guide shaft 115 can be fixedly connected to the frame of the circuit breaker testing equipment, thereby improving the stability of the second connecting plate 113 and guiding the movement of the extension and retraction end of the cylinder, preventing the cylinder from shaking during movement. Preferably, guide shafts 115 are respectively provided on opposite sides of the second connecting plate 113 to further improve the stability of the second connecting plate 113. Furthermore, the guide shaft 115 and the plate 1111 of the first connecting plate 111 are connected by fasteners. The fasteners are made of plastic material (such as nylon) to block the current path between the guide shaft 115 and the first connecting plate 111, forming insulation protection.

[0049] Optionally, such as Figure 2 and Figure 3 As shown, the outer wall of the guide shaft 115 is also fitted with an oil-free bushing 1151. The oil-free bushing 1151 is made of a self-lubricating material, which can make the movement of the guide shaft 115 smoother and ensure that the driving force of the drive unit 110 is efficiently converted into clamping force.

[0050] Another aspect of this utility model provides a clamping device 200, such as... Figure 4 As shown, it includes a support assembly 210 and an electrode contact structure 100. The support assembly 210 includes a support plate 211 and a second electrode piece 212 disposed on the support plate 211. The contact surface of the second electrode piece 212 is disposed opposite to the contact surface of the first electrode piece 120 of the electrode contact structure 100. The first electrode piece 120 and the second electrode piece 212 are driven to attach to opposite sides of the busbar 310 of the circuit breaker 300 under test, respectively, so as to clamp the busbar 310 and realize electrical conduction.

[0051] Specifically, such as Figure 4 As shown, the support assembly 210 includes a support plate 211, on which a cylinder and the aforementioned electrode contact structure 100 are mounted. A bearing plate 150 is also connected to the end of the drive portion 110 of the electrode contact structure 100 that faces away from the first electrode piece 120. The bearing plate 150 not only provides stability for the movement of the first electrode piece 120, but also fixes the electrode contact structure 100 to the support plate 211 of the clamping device 200, thereby assembling the clamping device 200. A second electrode plate 212 is connected to the end of the cylinder. The second electrode plate 212 is disposed opposite to the first electrode plate 120 of the electrode contact structure 100, and is located on opposite sides of the busbar 310 of the circuit breaker 300 under test. The motor contact structure can drive the first electrode plate 120 to move toward the outer side of the busbar 310, and the cylinder on the support plate 211 can drive the second electrode plate 212 to move toward the inner side of the busbar 310, until the first electrode plate 120 is in close contact with the outer side of the busbar 310 and the second electrode plate 212 is in close contact with the inner side of the busbar 310, thereby realizing the clamping and electrical connection of the busbar 310.

[0052] Optionally, there may be multiple second electrode pieces 212, and the number and position of the multiple second electrode pieces 212 correspond to the number and position of the multiple first electrode pieces 120, so as to cooperate with the first electrode pieces 120 to clamp the busbar 310.

[0053] The clamping device 200, through the cooperation of the second electrode plate 212 and the first electrode plate 120 of the electrode contact structure 100, achieves surface contact between the two opposite sides of the busbar 310, thereby reducing the size of the device and further improving the clamping reliability and flexibility. The specific structure and beneficial effects of the electrode contact structure 100 have been described in detail above and will not be repeated here.

[0054] Optionally, the second electrode 212 is connected to the support plate 211 via a hinge pin 130. The second electrode 212 can rotate along the axis of the hinge pin 130 so that the contact surface of the second electrode 212 is parallel to and electrically connected to the side of the busbar 310 opposite to the first electrode 120.

[0055] Specifically, to ensure that the second electrode 212 is tightly attached to the busbar 310, the second electrode 212 is connected to the support plate 211 via a hinge pin 130. When the cylinder drives the second electrode 212 to move until it contacts the inner side of the busbar 310, the second electrode 212 can rotate around the hinge point as the center of rotation along the axis of the hinge pin 130. At this time, the second electrode 212 can swing around the hinge point until the contact angle of the second electrode 212 matches that of the busbar 310, so that its contact surface is parallel to the inner side of the busbar 310, thus achieving tight contact between the second electrode 212 and the busbar 310. This improves the flexibility of the contact position between the second electrode 212 and the busbar 310, thereby improving the contact reliability.

[0056] Similarly, in order to ensure that the second electrode 212 is tightly attached to the inner side of the busbar 310, an elastic element 140 is provided on the side of the second electrode 212 away from the contact surface. The energy release direction of the elastic element 140 is in the same direction as the extension and retraction direction of the cylinder, and the elastic element 140 can provide force to the second electrode 212. Under the action of the elastic element 140, the second electrode 212 can be rotated more flexibly along the axis of the hinge pin 130 in conjunction with the hinge pin 130. Furthermore, when the second electrode 212 is tightly attached to the busbar 310, the elastic element 140 can provide a pre-tightening force to the second electrode 212 to tighten the busbar 310, further improving the reliability of the attachment between the second electrode 212 and the busbar 310.

[0057] Preferably, the elastic element 140 is a spring; and the number of elastic elements 140 can be multiple, corresponding to the number of second electrode pieces 212. Each second electrode piece 212 is provided with an elastic element 140 between it and the extension end of the cylinder, so as to ensure that each second electrode piece 212 can be tightly attached to the busbar 310.

[0058] In another aspect, this utility model provides a circuit breaker testing device, including a clamping device 200. The first electrode plate 120 and the second electrode plate 212 of the clamping device 200 are driven to move toward the busbar 310 of the circuit breaker 300 to be tested, and are respectively attached to the opposite sides of the circuit breaker 300 to be tested, so as to clamp the busbar 310.

[0059] Specifically, the number of clamping devices 200 is at least two, with two clamping devices 200 forming a group. The circuit breaker testing equipment may include multiple groups of clamping devices 200. The two clamping devices 200 are arranged relatively apart to reserve space for placing the circuit breaker 300 to be tested. After the circuit breaker 300 to be tested is placed between the two clamping devices 200, the two clamping devices 200 can clamp the busbars 310 on both sides of the circuit breaker 300 to be tested, thereby realizing the high-current test of the circuit breaker 300 to be tested. When the circuit breaker 300 to be tested is a multi-stage circuit breaker, multiple groups of clamping devices 200 can be set accordingly to clamp the busbars 310 of the multiple stages of the circuit breaker 300 to be tested. The specific structure and beneficial effects of the clamping device 200 have been described in detail above and will not be repeated here.

[0060] The circuit breaker testing equipment described above achieves miniaturization through the clamping device 200, which can flexibly adapt to busbars 310 with different center distances, while reducing the possibility of local overheating of busbars 310, thereby improving the testing accuracy.

[0061] The above description is merely an optional embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

[0062] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

Claims

1. An electrode contact structure for cooperating with a support assembly (210) of a circuit breaker testing apparatus to grip a busbar (310) of a circuit breaker (300) under test, characterized in that, The circuit breaker includes a drive unit (110) and a first electrode plate (120). The first electrode plate (120) is connected to the drive unit (110) via a hinge pin (130). The drive unit (110) can drive the first electrode plate (120) to approach the busbar (310) of the circuit breaker under test (300) and rotate it around the axis of the hinge pin (130) so that the contact surface of the first electrode plate (120) is in contact with one side of the busbar (310). The second electrode plate (212) of the support assembly (210) is disposed on the other side of the busbar (310). The first electrode plate (120) and the second electrode plate (212) cooperate to clamp the busbar (310) to achieve electrical conduction.

2. The electrode contact structure of claim 1, wherein, An elastic element (140) is provided between the first electrode plate (120) and the driving part (110). When the first electrode plate (120) rotates around the axis of the hinge pin (130) so that its contact surface is in contact with one side of the busbar (310), the elastic element (140) is used to provide a pre-tightening force to the first electrode plate (120) to press against the busbar (310).

3. The electrode contact structure of claim 1, wherein, The driving end of the driving unit (110) is connected to a first connecting plate (111). The first connecting plate (111) is located between the first electrode sheet (120) and the driving unit (110), and the first electrode sheet (120) is connected to the first connecting plate (111) through the hinge pin (130). The driving unit (110) drives the first electrode sheet (120) to move by pushing the first connecting plate (111). The first connecting plate (111) includes a plate body (1111) and two limiting plates (1112) respectively spaced apart on both sides of the plate body (1111). The hinge pin (130) passes through the first electrode sheet (120) and its two ends are respectively connected to the two limiting plates (1112).

4. The electrode contact structure according to any one of claims 1 to 3, characterized in that, The first electrode plate (120) has an oblong hole (122) opened along the axial direction of the hinge pin (130), the hinge pin (130) passes through the oblong hole (122), and the oblong hole (122) is used to limit the swing amplitude of the first electrode plate (120) around the hinge pin (130).

5. The electrode contact structure of claim 3, wherein, The driving end of the driving unit (110) is provided with a floating connector (112); it also includes a second connecting plate (113), through which the driving end passes, so that the floating connector (112) is located between the second connecting plate (113) and the first connecting plate (111) and is connected to the first connecting plate (111); an insulating pad (114) is attached to the side of the first connecting plate (111) away from the first electrode sheet (120).

6. The electrode contact structure of claim 5, wherein, The drive unit (110) is a cylinder, and the telescopic end of the cylinder passes through the second connecting plate (113) and moves relative to the second connecting plate (113); the second connecting plate (113) is provided with at least one guide shaft (115) along the telescopic direction of the cylinder, and the guide shaft (115) is used to guide the movement of the telescopic end of the cylinder.

7. The electrode contact structure of claim 3, wherein There are multiple first electrode plates (120), and the multiple first electrode plates (120) are arranged in sequence along the axial direction of the hinge pin (130); each first electrode plate (120) is connected to an output terminal (121) to enable the first electrode plate (120) to be electrically connected to the busbar (310).

8. A clamping device, characterized in that The device includes a support assembly (210) and an electrode contact structure (100) as described in any one of claims 1-7. The support assembly (210) includes a support plate (211) and a second electrode piece (212) movably disposed on the support plate (211). The contact surface of the second electrode piece (212) is disposed opposite to the contact surface of the first electrode piece (120) of the electrode contact structure (100). The first electrode piece (120) and the second electrode piece (212) are driven to attach to opposite sides of the busbar (310) of the circuit breaker (300) under test, respectively, to clamp the busbar (310) and achieve electrical conduction.

9. The clamping device of claim 8, wherein The second electrode plate (212) is connected to the support plate (211) via a hinge pin (130). The second electrode plate (212) can rotate along the axis of the hinge pin (130) so that the contact surface of the second electrode plate (212) is parallel to and electrically connected to the side of the busbar (310) away from the first electrode plate (120).

10. A circuit breaker testing apparatus characterized by, The clamping device (200) as described in claim 8 or 9 is provided, wherein the first electrode plate (120) and the second electrode plate (212) of the clamping device (200) are driven to move toward the busbar (310) of the circuit breaker (300) under test, and are respectively attached to the opposite sides of the circuit breaker (300) under test to clamp the busbar (310).

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