Bridge contact and switchgear

Abstract

This application provides a bridge-type contact and a switching device, relating to the field of low-voltage electrical technology. The bridge-type contact includes a first clamping plate group, a second clamping plate group, and a support structure. The second clamping plate group cooperates with the first clamping plate group to form a clamping opening, which is used to clamp and connect a busbar. The support structure is fixedly connected between the first clamping plate group and the second clamping plate group. The first clamping plate group extends in a direction away from the clamping opening to form a first extension section, and the second clamping plate group extends in a direction away from the clamping opening to form a second extension section. The first and second extension sections are used to fixably connect an external copper busbar, and both the first and second extension sections are in contact with the surface of the external copper busbar. According to the bridge-type contact provided in this application, the possibility of high temperature rise at the connection point between the bridge-type contact and the external copper busbar can be reduced, ensuring the performance of the bridge-type contact and thus ensuring the reliability of the switching device.

Description

Technical Field

[0001] This application relates to the field of low-voltage electrical technology, and in particular to a bridge-type contact and switching device. Background Technology

[0002] Bridge-type contacts are widely used in switching devices. Switching devices can include circuit breakers, relays, and contactors, and the reliability of these devices largely depends on the performance of the bridge-type contacts.

[0003] Taking a drawer-type circuit breaker as an example, a drawer-type circuit breaker includes bridge-type contacts, a drawer base, and a circuit breaker body, which is movable relative to the drawer base. The drawer base is connected to the circuit breaker body via the bridge-type contacts.

[0004] Based on the existing structure of bridge-type contacts, the connection between the bridge-type contacts and the external copper busbar is prone to high temperature rise, which in turn affects the performance of the bridge-type contacts. Utility Model Content

[0005] This application provides a bridge-type contact and a switching device, which can reduce the possibility of high temperature rise at the connection between the bridge-type contact and the external copper busbar, ensure the performance of the bridge-type contact, and thus ensure the reliability of the switching device.

[0006] In a first aspect, this application provides a bridge-type contact, comprising a first clamping plate group, a second clamping plate group, and a support structure. The second clamping plate group cooperates with the first clamping plate group to form a clamping opening for clamping a connecting busbar. The support structure is fixedly connected between the first clamping plate group and the second clamping plate group. The first clamping plate group extends in a direction away from the clamping opening to form a first extension segment, and the second clamping plate group extends in a direction away from the clamping opening to form a second extension segment. The first and second extension segments are used to fixably connect an external copper busbar, and both the first and second extension segments are in contact with the surface of the external copper busbar.

[0007] Compared to the prior art where the bridge-type contact clamps the busbar and then connects it to an external copper busbar, in this application example, a first clamping plate group extends in a direction away from the clamping opening to form a first extension section, and a second clamping plate group extends in a direction away from the clamping opening to form a second extension section. This allows the first extension section and the second extension section to cooperate and fixally connect to the external copper busbar, reducing the connection between the bridge-type contact and the busbar in the prior art, thereby avoiding the possibility of high temperature rise at the contact point between the bridge-type contact and the busbar.

[0008] The first extension section is a structure formed by extending the first clamping plate assembly in a direction away from the clamping opening. That is, the first extension section and the first clamping plate assembly are an integral structure, ensuring reliable connection and operational reliability between the first clamping plate assembly and the first extension section. The second extension section is a structure formed by extending the second clamping plate assembly in a direction away from the clamping opening. That is, the second extension section and the second clamping plate assembly are an integral structure, ensuring reliable connection and operational reliability between the second clamping plate assembly and the second extension section.

[0009] Furthermore, compared to the prior art where only one wall of the busbar contacts the external copper busbar, in this application example, both the first extension and the second extension contact the external copper busbar. The combined area of ​​the first extension and the second extension in contact with the external copper busbar is larger, which can reduce the possibility of high temperature rise at the contact points between the first extension and the external copper busbar and the second extension, thereby ensuring the reliability of the switchgear.

[0010] In some possible implementations, the first clamping piece group includes a first clamping piece. The second clamping piece group includes a second clamping piece, which cooperates with the first clamping piece to form a clamping opening. A support structure is disposed between the first clamping piece and the second clamping piece. The first clamping piece forms a first extension section along the side opposite to the clamping opening, and the second clamping piece extends in the direction opposite to the clamping opening to form a second extension section.

[0011] In this application example, only the first clamping piece is set to extend in the direction away from the clamping opening to form a first extension section, and the second clamping piece is set to extend in the direction away from the clamping opening to form a second extension section. The external copper busbar is fixedly connected through the first extension section and the second extension section, which can reduce the manufacturing cost of the bridge contact.

[0012] In some possible implementations, the first clamp includes a first bent section, a second bent section, and a first connecting section. The first bent section and the second bent section are set at an angle. The end of the first bent section away from the second bent section can abut against the connecting busbar. The first connecting section is located at the end of the second bent section away from the first bent section. The first connecting section is fixedly connected to the support structure. The first connecting section extends in a direction away from the clamping opening to form a first extension section.

[0013] In this application example, since the first bent segment and the second bent segment are part of the first clamping piece, and the end of the first bent segment away from the second bent segment can abut against the connecting busbar, the first bent segment, the second bent segment and the second clamping piece can cooperate to form a clamping opening to hold the connecting busbar.

[0014] By setting the first bending section and the second bending section at an angle, the force transmitted to the connecting busbar through the first bending section includes the component force toward the second clamp and the component force toward the first connecting section, which can improve the reliability of the first clamp and the second clamp clamping the connecting busbar.

[0015] In some possible implementations, the bridge contact also includes a fixing structure. The first extension section is provided with a first mounting through hole, and the second extension section is provided with a second mounting through hole. The setting position of the second mounting through hole corresponds to the setting position of the first mounting through hole. The fixing structure passes through the first mounting through hole, the external copper busbar and the second mounting through hole in sequence to connect the first extension section, the external copper busbar and the second extension section.

[0016] In this application example, the first mounting through hole is provided in the first extension section, and the second mounting through hole is provided in the second extension section. Based on this, the fixing structure passes through the first mounting through hole, the external copper busbar, and the second mounting through hole, which can realize the connection between the first extension section, the external copper busbar, and the second extension section, so that the first extension section contacts the wall surface of the external copper busbar facing the first extension section, and the second extension section contacts the wall surface of the external copper busbar facing the second extension section.

[0017] In some possible implementations, the bridge-type contact further includes a first spring and a second spring. The first spring is located on the side of the first clamping plate group opposite to the second clamping plate group. The end of the first spring away from the clamping opening is fixedly connected to the first clamping plate group, and the end of the first spring near the clamping opening abuts against the first clamping plate group. The second spring is located on the side of the second clamping plate group opposite to the first clamping plate group. The end of the second spring away from the clamping opening is fixedly connected to the second clamping plate group, and the end of the second spring near the clamping opening abuts against the second clamping plate group.

[0018] In this example, the end of the first spring piece furthest from the clamp is fixedly connected to the first clamping piece group, thus achieving a fixed connection between the first spring piece and the first clamping piece group. The end of the first spring piece near the clamp abuts against the first clamping piece group, which can apply a force towards the second clamping piece group to the first clamping piece group, making the clamping force of the clamp on the connecting busbar greater, making it easier to clamp the connecting busbar, and ensuring the reliability of the connection between the bridge contact and the connecting busbar.

[0019] The end of the second spring piece furthest from the clamp is fixedly connected to the second clamping plate group, thus achieving a fixed connection between the second spring piece and the second clamping plate group. The end of the second spring piece closest to the clamp abuts against the second clamping plate group, applying a force towards the first clamping plate group to the second clamping plate group. This results in a greater clamping force on the connecting busbar, making it easier to clamp the connecting busbar and ensuring the reliability of the connection between the bridge contact and the connecting busbar. It also reduces the possibility of high temperature rise at the contact point between the bridge contact and the connecting busbar due to an unreliable connection.

[0020] In some possible implementations, the bridge-type contact further includes a first mounting bracket and a second mounting bracket. The first mounting bracket is fixedly connected to the side of the first clamping piece group opposite to the second clamping piece group, and is connected to the end of the first spring piece away from the clamping opening. The second mounting bracket is fixedly connected to the side of the second clamping piece group opposite to the first clamping piece group, and is connected to the end of the second spring piece away from the clamping opening.

[0021] In this application example, the first mounting bracket is connected to the side of the first clamping plate group opposite to the second clamping plate group, and the second mounting bracket is connected to the side of the second clamping plate group opposite to the first clamping plate group. Therefore, the first mounting bracket and the second mounting bracket can achieve the connection between the bridge contact and other structures from different positions, ensuring the reliability of the connection between the bridge contact and other structures.

[0022] In some possible implementations, the first spring and the first mounting bracket are an integral structure. And / or, the second spring and the second mounting bracket are an integral structure.

[0023] By integrally molding the first spring and the first mounting bracket, compared to molding them separately, the assembly steps for the first spring and the first mounting bracket can be reduced, saving assembly costs for the bridge-type contact. Furthermore, integral molding of the first spring and the first mounting bracket reduces the number of parts and ensures dimensional and material consistency between the two components. The effect of an integral structure for the second spring and the second mounting bracket is similar to that of the first spring and the first mounting bracket, and will not be described in detail here.

[0024] In some possible implementations, the bridge contact also includes an elastic element, which is spaced apart from the support structure and located on the side of the support structure facing the clamp. The first end of the elastic element is connected to a first connecting structure, which is located in a first clamping plate group. The second end of the elastic element is connected to a second connecting structure, which is located in a second clamping plate group.

[0025] In this application example, the elastic element is spaced apart from the support structure and is located on the side of the support structure facing the clamping opening. The first end of the elastic element is connected to the first clamping plate group through the first connecting structure, and the second end of the elastic element is connected to the second clamping plate group through the second connecting structure. Therefore, the elastic element can apply a force to the first clamping plate group towards the second clamping plate group, and at the same time apply a force to the second clamping plate group towards the first clamping plate group. This makes the clamping force at the clamping opening of the first clamping plate group and the second clamping plate group greater, which can better ensure the connection reliability between the bridge contact and the connecting busbar. This makes the contact between the bridge contact and the connecting busbar tighter and reduces the possibility of high temperature rise due to unreliable contact between the bridge contact and the connecting busbar.

[0026] In some possible implementations, the first clamping plate group is provided with a plurality of first heat dissipation holes spaced apart, and a first connection structure is formed between two adjacent first heat dissipation holes. The second clamping plate group is provided with a plurality of second heat dissipation holes spaced apart, and a second connection structure is formed between two adjacent second heat dissipation holes.

[0027] In this application example, multiple first heat dissipation holes are spaced apart, and a first connection structure is formed between two adjacent first heat dissipation holes. The first end of the elastic element can be connected to the first connection structure, realizing the connection between the first end of the elastic element and the first clamping plate group. Multiple second heat dissipation holes are spaced apart, and a second connection structure is formed between two adjacent second heat dissipation holes. The second end of the elastic element can be connected to the second connection structure, realizing the connection between the second end of the elastic element and the second clamping plate group. This avoids the need for a connection structure protruding from the clamping plate group and reduces the manufacturing cost of the bridge-type contact.

[0028] Furthermore, taking the first clamp group and the connecting busbar as an example, during the use of the bridge-type contact, the temperature at the contact point between the first clamp group and the connecting busbar rises, causing the air between the first clamp group and the connecting busbar to expand due to heat. This results in the gas pressure between the first clamp group and the connecting busbar being greater than the gas pressure at the point where the first clamp group is away from the connecting busbar. The gas between the first clamp group and the connecting busbar reaches the space away from the connecting busbar through the first heat dissipation hole, which can improve the heat dissipation efficiency at the contact point between the first clamp group and the connecting busbar, reduce the temperature rise at the contact point, and ensure the reliability of the switchgear. The second heat dissipation hole plays a similar role to the first heat dissipation hole, and will not be elaborated upon here.

[0029] Secondly, this application provides a switching device, which includes a housing assembly and a bridge-type contact provided in the first aspect and its various possible implementations.

[0030] The beneficial effects of the bridge-type contacts provided in the second aspect and the various possible designs of the second aspect can be found in the first aspect and the various possible implementations of the first aspect, and will not be repeated here. Attached Figure Description

[0031] Figure 1 This is a structural schematic diagram of a bridge-type contact provided as an example of this application from a first-view perspective.

[0032] Figure 2 This is a structural schematic diagram of a bridge-type contact provided as an example of this application from a second-view perspective.

[0033] Figure 3 This is a schematic diagram of the structure of a first clip provided as an example of this application.

[0034] Figure 4 This is a schematic diagram illustrating the engagement of a first mounting bracket and a first spring piece, as provided in this application example.

[0035] Explanation of reference numerals in the attached figures:

[0036] 110. First clamping piece group; 111. First clamping piece; 1111. First bending section; 1112. Second bending section; 1113. First connecting section; 112. First heat dissipation hole; 120. First extension section; 121. First mounting through hole; 130. First spring piece; 131. Abutting section; 132. Second connecting section; 133. Fixing section; 140. First mounting bracket; 210. Second clamping piece group; 211. Second clamping piece; 220. Second extension section; 230. Second spring piece; 240. Second mounting bracket; 300. Clamping jaw; 400. Elastic element; 500. Support structure. Detailed Implementation

[0037] To make the purpose, technical solutions, and advantages of the examples in this application clearer, the technical solutions in the examples of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described examples are only a part of the examples in this application, not all of them. Based on the examples in this application, all other examples obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terms used herein in the description of the application are for the purpose of describing particular examples only and are not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the description, claims and drawings of this application are intended to cover non-exclusive inclusion.

[0039] In this document, the term "example" means that a particular feature, structure, or characteristic described in connection with the example can be included in at least one example of this application. The appearance of the phrase "example" in various places in the specification does not necessarily refer to the same example, nor is it a separate or alternative example mutually exclusive with other examples. It will be explicitly and implicitly understood by those skilled in the art that the examples described herein can be combined with other examples.

[0040] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists, A and B exist simultaneously, or B exists. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0041] The directional terms used in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the bridge-type contacts and switching devices of this application.

[0042] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0043] In the description of this application, unless otherwise stated, "multiple" means two or more (including two), and similarly, "multiple groups" means two or more (including two groups).

[0044] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection, such as a fixed connection, for example, a connection fixed by a partition, such as a connection fixed by screws, bolts, or other partitions; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0045] Based on the above, this application provides a bridge-type contact and a switching device.

[0046] To enable those skilled in the art to better understand the present application, the bridge-type contact and switching device provided in the present application example will be clearly and completely described below with reference to the accompanying drawings.

[0047] For example, this application provides a switching device.

[0048] Switching devices can be any of the following: circuit breakers, relays, and contactors. Switching devices may include housing assemblies and bridge-type contacts.

[0049] Taking a drawer-type circuit breaker as an example, a drawer-type circuit breaker may include a drawer base, a circuit breaker body, and bridge-type contacts. The bridge-type contacts connect the drawer base and the circuit breaker body, realizing the electrical connection between the drawer base and the circuit breaker body. The drawer base is the housing assembly mentioned in the context of switching devices.

[0050] The drawer base can have a receiving cavity in which the circuit breaker body can be installed, facilitating the connection between the circuit breaker body and the drawer base. In the event of a circuit breaker body failure, the circuit breaker body can be removed from the receiving cavity and replaced with a spare circuit breaker body, thereby improving the maintenance efficiency of the drawer-type circuit breaker.

[0051] Drawer-type circuit breakers can also be used as isolators. When a circuit or equipment needs maintenance, the circuit breaker body can be pulled out of its housing to disconnect and isolate the circuit, ensuring the safety of maintenance personnel during the maintenance process. Here, "circuit" refers to the circuit electrically connected to the drawer-type circuit breaker, and "equipment" refers to equipment directly or indirectly electrically connected to the drawer-type circuit breaker.

[0052] Some bridge-type contacts extend to the outside of the housing assembly to be electrically connected to the circuit via an external copper busbar. Bridge-type contacts located inside the housing assembly are electrically connected to the circuit breaker body via a connecting busbar. One external copper busbar can connect to one bridge-type contact, or multiple bridge-type contacts can be connected to one external copper busbar; this application does not impose specific limitations on this.

[0053] The structure of the circuit breaker body in this application is consistent with that of prior art circuit breaker bodies, and will not be described in detail here. For details regarding the specific structure of the bridge-type contacts, please refer to the following text, which will not be described in detail here.

[0054] Since the switching device provided in this application includes the bridge-type contact described below, the switching device has the same effects as the bridge-type contact described below.

[0055] Next, we will elaborate on the bridge-type contacts mentioned in the section on switching devices.

[0056] For example, this application provides a bridge-type contact. Figure 1 For a structural schematic diagram of a bridge-type contact provided as an example in this application from a first-view perspective, please refer to... Figure 1 The bridge-type contact includes a first clamping plate group 110, a second clamping plate group 210, and a support structure 500. The second clamping plate group 210 cooperates with the first clamping plate group 110 to form a clamping opening 300, which is used to clamp and connect the busbar. The support structure 500 is fixedly connected between the first clamping plate group 110 and the second clamping plate group 210. The first clamping plate group 110 extends in a direction away from the clamping opening 300 to form a first extension section 120, and the second clamping plate group 210 extends in a direction away from the clamping opening 300 to form a second extension section 220. The first extension section 120 and the second extension section 220 are used to fix and connect the external copper busbar, and both the first extension section 120 and the second extension section 220 are in contact with the surface of the external copper busbar.

[0057] Both the first clip group 110 and the second clip group 210 may include multiple clips, which are arranged along the arrangement direction of the first clip group 110 and the second clip group 210.

[0058] The first clamp group 110 and the second clamp group 210 are connected by an elastic element 400 or other connecting structure, as long as the size of the clamping opening 300 formed by the first clamp group 110 and the second clamp group 210 is adjustable so that the clamping opening 300 can clamp the connecting busbar. The end of the connecting busbar away from the bridge contact can be connected to the circuit breaker body, and the electrical connection between the bridge contact and the circuit breaker body can be realized through the connecting busbar.

[0059] The support structure 500 can be a block structure, a rod structure, etc. The support structure 500 is located between the first clamping piece group 110 and the second clamping piece group 210, and can provide support for the first clamping piece group 110 and the second clamping piece group 210, so that the first clamping piece group 110 and the second clamping piece group 210 can cooperate to form a clamping opening 300.

[0060] The support structure 500 can be fixedly connected between the first clamping plate group 110 and the second clamping plate group 210 by means of threaded connection, riveting, snap-fit, etc.

[0061] The first clamping piece group 110 extends in a direction away from the clamping opening 300 to form a first extension section 120, that is, the first extension section 120 is integrally formed with the first clamping piece group 110. The second clamping piece group 210 extends in a direction away from the clamping opening 300 to form a second extension section 220, that is, the second extension section 220 is integrally formed with the second clamping piece group 210.

[0062] The first extension 120 can be formed by extending the clips in the first clip group 110 that are in contact with the external copper busbar in a direction away from the clamping opening 300. Alternatively, the first extension 120 can be formed by all the clips in the first clip group 110 extending in a direction away from the clamping opening 300. This application example does not impose specific limitations on this. The structure of the second extension 220 is similar to that of the first extension 120, and this application example will not elaborate on it here.

[0063] The first extension section 120 and the second extension section 220 can be used to fix an external copper busbar. The end of the external copper busbar away from the bridge contact is electrically connected to the external circuit. The bridge contact and the external circuit can be electrically connected through the external copper busbar.

[0064] Compared to the prior art where the bridge-type contact clamps the busbar and then connects it to an external copper busbar, in this application example, by setting the first clamping plate group 110 to extend in a direction away from the clamping opening 300 to form a first extension section 120, and the second clamping plate group 210 to extend in a direction away from the clamping opening 300 to form a second extension section 220, the first extension section 120 and the second extension section 220 cooperate to fix the external copper busbar, which can reduce the connection between the bridge-type contact and the busbar in the prior art, thereby avoiding the possibility of high temperature rise at the contact point between the bridge-type contact and the busbar.

[0065] The first extension 120 is a structure formed by extending the first clamping piece group 110 in a direction away from the clamping opening 300. That is, the first extension 120 and the first clamping piece group 110 are an integral structure, which can ensure the connection reliability and operational reliability of the first clamping piece group 110 and the first extension 120. The second extension 220 is a structure formed by extending the second clamping piece group 210 in a direction away from the clamping opening 300. That is, the second extension 220 and the second clamping piece group 210 are an integral structure, which can ensure the connection reliability and operational reliability of the second clamping piece group 210 and the second extension 220.

[0066] Furthermore, compared to the prior art where only one wall of the busbar contacts the external copper busbar, in this application example, both the first extension 120 and the second extension 220 contact the external copper busbar. The combined contact area of ​​the first extension 120 and the second extension 220 with the external copper busbar is larger, which can reduce the possibility of high temperature rise at the contact points between the first extension 120 and the external copper busbar and the second extension 220 and the external copper busbar, thereby ensuring the reliability of the switchgear.

[0067] Based on the bridge-type contact provided in the example above, please refer to... Figure 1 The first clamping piece group 110 includes a first clamping piece 111. The second clamping piece group 210 includes a second clamping piece 211. The second clamping piece 211 and the first clamping piece 111 cooperate to form a clamping opening 300. A support structure 500 is disposed between the first clamping piece 111 and the second clamping piece 211. The first clamping piece 111 forms a first extension section 120 along the side opposite to the clamping opening 300. The second clamping piece 211 extends in the direction opposite to the clamping opening 300 to form a second extension section 220.

[0068] Both the first clip 111 and the second clip 211 are the clips mentioned above.

[0069] When the first clip group 110 includes only one clip, that clip is the first clip 111. When the first clip group 110 includes multiple clips, the first clip 111 is the one among the multiple clips that is closest to the second clip group 210.

[0070] When the second clip group 210 includes only one clip, that clip is the second clip 211. When the second clip group 210 includes multiple clips, the second clip 211 is the one among the multiple clips that is closest to the first clip group 110.

[0071] A support structure 500 is provided between the first clamping piece 111 and the second clamping piece 211. The support structure 500 can maintain a distance between the first clamping piece 111 and the second clamping piece 211, so that the first clamping piece 111 and the second clamping piece 211 can cooperate to form a clamping opening 300, so as to clamp the connecting busbar through the clamping opening 300.

[0072] The first clip 111 extends in a direction away from the clamping opening 300 to form a first extension section 120, that is, the first extension section 120 is integrally formed with the first clip 111. The second clip 211 extends in a direction away from the clamping opening 300 to form a second extension section 220, that is, the second extension section 220 is integrally formed with the second clip 211.

[0073] In this application example, only the first clamping piece 111 is set to extend in the direction away from the clamping opening 300 to form a first extension section 120, and the second clamping piece 211 is set to extend in the direction away from the clamping opening 300 to form a second extension section 220. The external copper busbar is fixedly connected by the first extension section 120 and the second extension section 220, which can reduce the manufacturing cost of the bridge contact.

[0074] The structure of the first clip 111 is similar to that of the second clip 211. Hereinafter, the structures of the first clip 111 and the second clip 211 will be described by way of example only, taking the first clip 111 as an example.

[0075] For example, Figure 2 This application provides a schematic diagram of a bridge-type contact from a second-view perspective. Figure 3 For a schematic diagram of the structure of a first clip provided as an example of this application, please refer to... Figures 1-3 The first clamp 111 may include a first bent section 1111, a second bent section 1112, and a first connecting section 1113. The first bent section 1111 and the second bent section 1112 are set at an angle. The end of the first bent section 1111 away from the second bent section 1112 can abut against the connecting busbar. The first connecting section 1113 is located at the end of the second bent section 1112 away from the first bent section 1111. The first connecting section 1113 is fixedly connected to the support structure 500. The first connecting section 1113 extends in a direction away from the clamping opening 300 to form a first extension section 120.

[0076] The angle formed by the first bent segment 1111 and the second bent segment 1112 can be either obtuse or right. The end of the first bent segment 1111 away from the second bent segment 1112 can abut against the connecting busbar. Through force decomposition, it can be seen that the force transmitted to the connecting busbar through the first bent segment 1111 includes a component force toward the second clamp 211 and a component force toward the first connecting segment 1113.

[0077] The first connecting section 1113 is located at the end of the second bending section 1112 away from the first bending section 1111. The first connecting section 1113 can be connected to the support structure 500 by means of threaded connection, riveting, snap-fit, etc. The support structure 500 is located on the side of the first connecting section 1113 facing the second clip 211.

[0078] In this application example, since the first bent segment 1111 and the second bent segment 1112 are part of the first clamping piece 111, and the end of the first bent segment 1111 away from the second bent segment 1112 can abut against the connecting busbar, the first bent segment 1111, the second bent segment 1112 and the second clamping piece 211 can cooperate to form a clamping opening 300 to clamp the connecting busbar.

[0079] By setting the first bending section 1111 and the second bending section 1112 at an angle, the force transmitted to the connecting busbar through the first bending section 1111 includes a component force toward the second clamping piece 211 and a component force toward the first connecting section 1113, thereby improving the reliability of the first clamping piece 111 and the second clamping piece 211 in clamping the connecting busbar.

[0080] For example, the first clip 111 may further include a guide section, which is located at the end of the first bend 1111 opposite to the second bend 1112. The guide section is angled to the first bend 1111, and the inclination direction of the guide section is adapted to the direction of the connecting busbar insertion clamp 300.

[0081] In this application example, by setting the guide segment at one end of the first bending segment 1111 away from the second bending segment 1112, and setting the guide segment at an angle to the first bending segment 1111, the inclination direction of the guide segment is adapted to the direction of the connecting busbar insertion clamp 300, so that the size of the clamp 300 decreases from large to small along the direction of the connecting busbar insertion clamp 300. During the process of inserting the connecting busbar into the bridge contact, the connecting busbar can be inserted first into the part with the largest size of the clamp 300, which is beneficial to improving the assembly direction of the connecting busbar and the bridge contact.

[0082] Based on the bridge-type contact provided in the above example, the bridge-type contact also includes a fixing structure (not shown in the figure). The first extension 120 is provided with a first mounting through hole 121, and the second extension 220 is provided with a second mounting through hole. The setting position of the second mounting through hole corresponds to the setting position of the first mounting through hole 121. The fixing structure passes through the first mounting through hole 121, the external copper busbar and the second mounting through hole in sequence to connect the first extension 120, the external copper busbar and the second extension 220.

[0083] The first mounting through hole 121 and the second mounting through hole can be threaded holes or smooth holes, etc. There can be only one first mounting through hole 121, or there can be multiple first mounting through holes 121 spaced apart. The number of second mounting through holes is equal to the number of first mounting through holes 121, and the positions of the second mounting through holes correspond one-to-one with the positions of the first mounting through holes 121.

[0084] The external copper busbar is provided with a third mounting through hole, the number of which is equal to the number of the first mounting through holes 121. The position of the third mounting through hole corresponds to the position of the first mounting through hole 121 and the second mounting through hole. The fixing structure passes through the first mounting through hole 121 and can extend into the third mounting through hole and the second mounting through hole to connect the first extension section 120, the external copper busbar, and the second extension section 220.

[0085] The fixing structure can be a threaded component such as a screw or bolt, or it can be a structural component such as a riveting component. The fixing structure can sequentially pass through the first mounting through hole 121, the external copper busbar, and the second mounting through hole to achieve the connection of the first extension section 120, the external copper busbar, and the second extension section 220.

[0086] In this application example, the first mounting through hole 121 is provided in the first extension 120, and the second mounting through hole is provided in the second extension 220. Based on this, the fixing structure passes through the first mounting through hole 121, the external copper busbar, and the second mounting through hole, which can realize the connection between the first extension 120, the external copper busbar, and the second extension 220, so that the first extension 120 contacts the wall surface of the external copper busbar facing the first extension 120, and the second extension 220 contacts the wall surface of the external copper busbar facing the second extension 220.

[0087] Based on the bridge-type contact provided in the example above, please refer to... Figure 1 and Figure 2 The bridge-type contact also includes a first spring 130 and a second spring 230. The first spring 130 is located on the side of the first clamping plate group 110 opposite to the second clamping plate group 210. The end of the first spring 130 away from the clamping opening 300 is fixedly connected to the first clamping plate group 110, and the end of the first spring 130 near the clamping opening 300 abuts against the first clamping plate group 110. The second spring 230 is located on the side of the second clamping plate group 210 opposite to the first clamping plate group 110. The end of the second spring 230 away from the clamping opening 300 is fixedly connected to the second clamping plate group 210, and the end of the second spring 230 near the clamping opening 300 abuts against the second clamping plate group 210.

[0088] The end of the first spring piece 130 facing away from the clamp 300 can be fixedly connected to the first clamping piece group 110 by means of riveting, threaded connection or other methods. The end of the first spring piece 130 near the clamp 300 can abut against the position of the first clamping piece group 110 in contact with the connecting busbar and facing away from the connecting busbar. The end of the first spring piece 130 near the clamp 300 can also abut against other positions of the first clamping piece group 110.

[0089] The end of the second spring piece 230 facing away from the clamp 300 can be fixedly connected to the second clamping piece group 210 by means of riveting, threaded connection, etc. The end of the second spring piece 230 near the clamp 300 can abut against the position of the second clamping piece group 210 in contact with the connecting busbar and facing away from the connecting busbar. The end of the second spring piece 230 near the clamp 300 can also abut against other positions of the second clamping piece group 210.

[0090] In this application example, the end of the first spring 130 away from the clamp 300 is fixedly connected to the first clamping plate group 110, which can realize the fixed connection between the first spring 130 and the first clamping plate group 110. The end of the first spring 130 near the clamp 300 abuts against the first clamping plate group 110, which can apply a force towards the second clamping plate group 210 to the first clamping plate group 110, which can make the clamping force of the clamp 300 on the connecting busbar greater, making it easier to clamp the connecting busbar, and ensuring the reliability of the connection between the bridge contact and the connecting busbar.

[0091] The end of the second spring 230 furthest from the clamp 300 is fixedly connected to the second clamping plate group 210, thus achieving a fixed connection between the second spring 230 and the second clamping plate group 210. The end of the second spring 230 near the clamp 300 abuts against the second clamping plate group 210, which can apply a force towards the first clamping plate group 110 to the second clamping plate group 210. This allows the clamp 300 to hold the connecting busbar with greater force, making it easier to clamp the connecting busbar, ensuring the reliability of the connection between the bridge contact and the connecting busbar, and reducing the possibility of high temperature rise at the contact point between the bridge contact and the connecting busbar due to unreliable connection.

[0092] The structure of the first spring 130 is similar to that of the second spring 230. Hereinafter, the structure of the first spring 130 and the second spring 230 will be described by way of example only, taking the first spring 130 as an example.

[0093] For example, Figure 4 A schematic diagram illustrating the engagement of a first mounting bracket and a first spring clip, as provided in this application, is shown below. Figure 4 The first spring 130 includes a fixing section 133, a second connecting section 132, and an abutting section 131.

[0094] The second connecting section 132 connects the fixing section 133 and the abutting section 131. The fixing section 133 is positioned further away from the clamping opening 300 than the abutting section 131, and is fixedly connected to the side of the first clamping plate group 110 opposite to the second clamping plate group 210. The abutting section 131 is positioned closer to the clamping opening 300 than the fixing section 133, and abuts against the side of the first clamping plate group 110 opposite to the second clamping plate group 210, applying a force towards the second clamping plate group 210 to the first clamping plate group 110, thus ensuring more reliable contact between the first clamping plate group 110 and the connecting busbar.

[0095] The second connecting section 132 and the abutting section 131 are set at an angle, and the included angle between the second connecting section 132 and the abutting section 131 is smaller than the included angle between the first bending section 1111 and the second bending section 1112. The difference in the included angle can be less than or equal to 3°, so that the first spring piece 130 deforms during use, and the abutting section 131 applies a greater force to the first clamping piece group 110 toward the second clamping piece group 210, making the contact between the first clamping piece group 110 and the connecting busbar more reliable.

[0096] Based on the bridge-type contact provided in the example above, please refer to... Figure 1 and Figure 2 The bridge-type contact also includes a first mounting bracket 140 and a second mounting bracket 240. The first mounting bracket 140 is fixedly connected to the side of the first clamping piece group 110 opposite to the second clamping piece group 210, and is connected to the end of the first spring piece 130 away from the clamping opening 300. The second mounting bracket 240 is fixedly connected to the side of the second clamping piece group 210 opposite to the first clamping piece group 110, and is connected to the end of the second spring piece 230 away from the clamping opening 300.

[0097] One end of the first mounting bracket 140 can be connected to the housing assembly of the switchgear, and the other end of the first mounting bracket 140 is fixedly connected to the side of the first clamp group 110 opposite to the second clamp group 210, so as to achieve a fixed connection between the bridge contact and the housing assembly.

[0098] The end of the first mounting bracket 140 that connects to the first clamping piece group 110 is simultaneously connected to the first spring piece 130. At this time, the first mounting bracket 140 can be integrally formed with the first spring piece 130 and fixedly connected to the first clamping piece group 110, or the first mounting bracket 140 can be separately set from the first spring piece 130, and the connection of the first mounting bracket 140, the first spring piece 130 and the first clamping piece group 110 can be realized by connecting the first mounting bracket 140, the first spring piece 130 and the first clamping piece group 110 through threaded parts, riveting parts and other connecting parts.

[0099] One end of the second mounting bracket 240 can be connected to the housing assembly of the switchgear, and the other end of the second mounting bracket 240 is fixedly connected to the side of the second clamp group 210 opposite to the first clamp group 110, so as to achieve a fixed connection between the bridge contact and the housing assembly from a different position compared to the first mounting bracket 140, thereby further ensuring the reliability of the connection between the bridge contact and the housing assembly.

[0100] The end of the second mounting bracket 240 that connects to the second clamping piece group 210 is simultaneously connected to the second spring piece 230. In this case, the second mounting bracket 240 can be integrally formed with the second spring piece 230 and fixedly connected to the second clamping piece group 210; alternatively, the second mounting bracket 240 can be separately set from the second spring piece 230, with threaded parts, riveting parts, or other connecting parts passing through the second mounting bracket 240, the second spring piece 230, and the second clamping piece group 210 to achieve connection.

[0101] In this application example, the first mounting bracket 140 is connected to the side of the first clamping plate group 110 opposite to the second clamping plate group 210, and the second mounting bracket 240 is connected to the side of the second clamping plate group 210 opposite to the first clamping plate group 110. Therefore, the first mounting bracket 140 and the second mounting bracket 240 can achieve the connection between the bridge contact and other structures from different positions, ensuring the reliability of the connection between the bridge contact and other structures.

[0102] Based on the bridge-type contact provided in the example above, please refer to... Figure 4 The first spring 130 and the first mounting bracket 140 are integral structures. And / or, the second spring 230 and the second mounting bracket 240 are integral structures.

[0103] By integrally molding the first spring 130 and the first mounting bracket 140, compared to separate molding of the first spring 130 and the first mounting bracket 140, the assembly steps of the first spring 130 and the first mounting bracket 140 can be reduced, saving assembly costs for the bridge contact. Furthermore, the integral molding of the first spring 130 and the first mounting bracket 140 reduces the number of parts and ensures dimensional and material consistency between the first spring 130 and the first mounting bracket 140.

[0104] By integrally molding the second spring 230 and the second mounting bracket 240, compared to separate molding, the assembly steps for the second spring 230 and the second mounting bracket 240 can be reduced, saving assembly costs for the bridge contact. Furthermore, integral molding reduces the number of parts and ensures dimensional and material consistency between the second spring 230 and the second mounting bracket 240.

[0105] Based on the bridge-type contact provided in the above example, the bridge-type contact further includes an elastic element 400. The elastic element 400 is spaced apart from the support structure 500, and the elastic element 400 is located on the side of the support structure 500 facing the clamp 300. The first end of the elastic element 400 is connected to the first connecting structure, which is located in the first clamping plate group 110. The second end of the elastic element 400 is connected to the second connecting structure, which is located in the second clamping plate group 210.

[0106] The elastic element 400 can be an elastic structure such as a spring or an elastic sheet.

[0107] The first connecting structure can be a hook-shaped structure, ring-shaped structure, rod-shaped structure, groove-shaped structure, etc., provided in the first clamping piece group 110, as long as the first end of the elastic member 400 can be connected to the first connecting structure. The second connecting structure is similar to the first connecting structure, and the example in this application will be described in detail here. The number of second connecting structures is equal to the number of first connecting structures, and the setting positions of the first connecting structures correspond to the setting positions of the second connecting structures.

[0108] In this application example, the elastic element 400 is spaced apart from the support structure 500 and is located on the side of the support structure 500 facing the clamping opening 300. The first end of the elastic element 400 is connected to the first clamping piece group 110 through the first connecting structure, and the second end of the elastic element 400 is connected to the second clamping piece group 210 through the second connecting structure. Therefore, the elastic element 400 can apply a force to the first clamping piece group 110 towards the second clamping piece group 210, and at the same time apply a force to the second clamping piece group 210 towards the first clamping piece group 110. This makes the clamping force at the clamping opening 300 of the first clamping piece group 110 and the second clamping piece group 210 greater, which can better ensure the connection reliability between the bridge contact and the connecting busbar. This makes the contact between the bridge contact and the connecting busbar tighter and reduces the possibility of high temperature rise due to unreliable contact between the bridge contact and the connecting busbar.

[0109] Based on the bridge-type contact provided in the above example, the first clamping plate group 110 is provided with a plurality of first heat dissipation holes 112 spaced apart, and a first connection structure is formed between two adjacent first heat dissipation holes 112. The second clamping plate group 210 is provided with a plurality of second heat dissipation holes spaced apart, and a second connection structure is formed between two adjacent second heat dissipation holes.

[0110] The first heat dissipation hole 112 can be a regularly shaped hole such as a round hole or a rectangular hole, or it can be an irregularly shaped hole. Multiple first heat dissipation holes 112 can be positioned at any location on the first clamping plate group 110, as long as a first connecting structure is formed between adjacent first heat dissipation holes 112, allowing the first end of the elastic member 400 to be connected to the first connecting structure.

[0111] The second heat dissipation hole can be a regularly shaped hole such as a round hole or a rectangular hole, or it can be an irregularly shaped hole. Multiple second heat dissipation holes can be positioned at any location on the second clamping plate group 210, as long as a second connecting structure is formed between adjacent second heat dissipation holes, allowing the second end of the elastic member 400 to connect to the second connecting structure.

[0112] In this application example, multiple first heat dissipation holes 112 are spaced apart, and a first connection structure is formed between two adjacent first heat dissipation holes 112. The first end of the elastic member 400 can be connected to the first connection structure, realizing the connection between the first end of the elastic member 400 and the first clamping plate group 110. Multiple second heat dissipation holes are spaced apart, and a second connection structure is formed between two adjacent second heat dissipation holes. The second end of the elastic member 400 can be connected to the second connection structure, realizing the connection between the second end of the elastic member 400 and the second clamping plate group 210. This avoids the need for a connection structure protruding from the clamping plate group and reduces the manufacturing cost of the bridge-type contact.

[0113] Furthermore, taking the first clamp group 110 and the connecting busbar as an example, during the use of the bridge-type contact, the temperature at the contact point between the first clamp group 110 and the connecting busbar rises, causing the air between the first clamp group 110 and the connecting busbar to expand due to heat. This results in the gas pressure between the first clamp group 110 and the connecting busbar being greater than the gas pressure at the point where the first clamp group 110 is away from the connecting busbar. The gas between the first clamp group 110 and the connecting busbar reaches the space away from the connecting busbar through the first heat dissipation hole 112, which can improve the heat dissipation efficiency at the contact point between the first clamp group 110 and the connecting busbar, reduce the temperature rise at the contact point, and ensure the reliability of the switching device. The second heat dissipation hole plays a similar role to the first heat dissipation hole 112, and will not be elaborated further in this application.

[0114] Finally, it should be noted that the above embodiments are merely specific implementations of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A bridge-type contact, characterized in that, include: First clamping plate group; The second clamping plate group cooperates with the first clamping plate group to form a clamping opening, which is used to clamp the connecting busbar; A support structure is fixedly connected between the first clamping plate group and the second clamping plate group; The first clamping plate group extends in a direction away from the clamping opening to form a first extension section, and the second clamping plate group extends in a direction away from the clamping opening to form a second extension section. The first extension section and the second extension section are used to fix and connect an external copper busbar, and both the first extension section and the second extension section are in contact with the surface of the external copper busbar.

2. The bridge-type contact according to claim 1, characterized in that, The first clip group includes a first clip; The second clamping piece group includes a second clamping piece, which cooperates with the first clamping piece to form the clamping opening. The support structure is disposed between the first clamping piece and the second clamping piece. The first clamping piece forms a first extension section along the side opposite to the clamping opening, and the second clamping piece extends in the direction opposite to the clamping opening to form a second extension section.

3. The bridge-type contact according to claim 2, characterized in that, The first clamp includes a first bent section, a second bent section, and a first connecting section. The first bent section and the second bent section are set at an angle. The end of the first bent section away from the second bent section can abut against the connecting busbar. The first connecting section is located at the end of the second bent section away from the first bent section. The first connecting section is fixedly connected to the support structure. The first connecting section extends in a direction away from the clamp to form the first extension section.

4. The bridge-type contact according to claim 1, characterized in that, It also includes fixed structures, The first extension section is provided with a first mounting through hole, and the second extension section is provided with a second mounting through hole. The position of the second mounting through hole corresponds to the position of the first mounting through hole. The fixing structure passes through the first mounting through hole, the external copper busbar and the second mounting through hole in sequence to connect the first extension section, the external copper busbar and the second extension section.

5. The bridge-type contact according to any one of claims 1 to 4, characterized in that, Also includes: A first spring is disposed on the side of the first clip group away from the second clip group. The end of the first spring away from the clamp is fixedly connected to the first clip group, and the end of the first spring near the clamp is abutted against the first clip group. The second spring is disposed on the side of the second clip group away from the first clip group. The end of the second spring away from the clamp is fixedly connected to the second clip group, and the end of the second spring near the clamp is abutted against the second clip group.

6. The bridge-type contact according to claim 5, characterized in that, Also includes: A first mounting bracket is fixedly connected to the side of the first clip group away from the second clip group, and the first mounting bracket is connected to the end of the first spring piece away from the clamping opening; The second mounting bracket is fixedly connected to the side of the second clip group away from the first clip group, and the second mounting bracket is connected to the end of the second spring piece away from the clamping opening.

7. The bridge-type contact according to claim 6, characterized in that, The first spring and the first mounting bracket are an integral structure; and / or, the second spring and the second mounting bracket are an integral structure.

8. The bridge-type contact according to claim 1, characterized in that, Also includes: An elastic element is provided, which is spaced apart from the support structure and is located on the side of the support structure facing the clamp. The first end of the elastic element is connected to a first connecting structure, which is located in the first clamping piece group. The second end of the elastic element is connected to a second connecting structure, which is located in the second clamping piece group.

9. The bridge-type contact according to claim 8, characterized in that, The first clip group is provided with a plurality of first heat dissipation holes at intervals, and the first connection structure is formed between two adjacent first heat dissipation holes; The second clamping piece group is provided with a plurality of second heat dissipation holes at intervals, and a second connection structure is formed between two adjacent second heat dissipation holes.

10. A switching device, characterized in that, It includes a housing assembly and a bridge-type contact as described in any one of claims 1 to 9, the bridge-type contact being mounted to the housing assembly.

Images