Bridge type clamping component and drawer type circuit breaker

Abstract

The utility model provides a bridge type clamping component and a drawer type circuit breaker, and relates to the technical field of low-voltage electric appliances. The embodiment of the utility model provides a bridge-type clamping component, and the bridge-type clamping component is installed on a drawer seat, and comprises a supporting frame, a first busbar, and a contact body. The supporting frame is connected to the drawer base, the first busbar is connected with the supporting frame, and the contact body is connected with the first busbar. The supporting frame comprises a first connecting part, a heat dissipation part and a second connecting part, the first connecting part is connected with the drawer base, the two sides of the heat dissipation part are connected to the first connecting part and the second connecting part respectively, the second connecting part is connected with the first busbar, and at least one first heat dissipation hole is formed in the heat dissipation part. According to the bridge type clamping component provided by the embodiment of the invention, the heat dissipation efficiency of the drawer type circuit breaker can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to a bridge-type clamping component and a drawer-type circuit breaker. Background Art

[0002] Bridge-type clamping components are widely used in switching electrical appliances such as circuit breakers, relays and household appliances. Whether the switching electrical appliances can be used reliably depends largely on the performance of the bridge-type clamping components.

[0003] Taking a drawer type circuit breaker as an example, the drawer type circuit breaker comprises a bridge type clamping component, a drawer seat and a circuit breaker body, and the circuit breaker body can move relative to the drawer seat. The drawer seat is connected to the circuit breaker body through the bridge type clamping component.

[0004] Based on the structure of the existing bridge-type clamping component, the heat dissipation effect of the drawer-type circuit breaker is poor, resulting in a high temperature rise in the drawer-type circuit breaker, which may affect the performance of the drawer-type circuit breaker. Utility Model Content

[0005] The present application provides a bridge-type clamping component to solve the problem of poor heat dissipation effect of a drawer-type circuit breaker and improve the heat dissipation efficiency of the drawer-type circuit breaker.

[0006] In the first aspect, the present application provides an example of a bridge-type clamping component, which is installed on a drawer seat, and the bridge-type clamping component includes a support frame, a first busbar, and a contact body. The support frame is connected to the drawer seat, the first busbar is connected to the support frame, and the contact body is connected to the first busbar. The support frame includes a first connection portion, a heat dissipation portion, and a second connection portion. The first connection portion is connected to the drawer seat, and the two sides of the heat dissipation portion are respectively connected to the first connection portion and the second connection portion, and the second connection portion is connected to the first busbar. The heat dissipation portion is provided with at least one first heat dissipation hole.

[0007] The drawer seat can provide a mounting carrier for the bridge-type clamping component. The support member in the bridge-type clamping component can install the first busbar in the drawer seat. The support frame can divide the accommodating chamber of the drawer seat into a first chamber where the contact body is set and a second chamber where the contact body is not set. During the operation of the drawer-type circuit breaker, the heat generated at the contact position between the circuit breaker body and the first busbar causes the gas in the first chamber to expand due to the heat. The gas pressure in the first chamber is greater than the gas pressure in the second chamber. The gas in the first chamber moves to the second chamber through the heat dissipation holes, so that the gas in the first chamber moves to the second chamber. The gas in the second chamber can also move to the first chamber through the heat dissipation holes to improve the heat dissipation efficiency at the contact position between the circuit breaker body and the first busbar, reduce the temperature rise at the contact position between the circuit breaker body and the first busbar, and ensure the reliability of the use of the drawer-type circuit breaker.

[0008] In some possible implementations, the contact body includes a contact support and a clamping structure mounted on the contact support, wherein a first end of the clamping structure clamps the first busbar. The contact support is provided with at least one second heat dissipation hole.

[0009] During the use of the drawer-type circuit breaker, the heat generated at the clamping structure can move away from the clamping structure through the second heat dissipation hole along with the air flow, thereby reducing the temperature rise generated at the clamping structure and improving the heat dissipation efficiency of the bridge-type clamping component.

[0010] In some possible implementations, the first end of the clamping structure has a first plug interface, and part of the first busbar is inserted into the first plug interface. The first heat dissipation hole has a first opening close to the first plug interface and a second opening away from the first plug interface, and the area of ​​the first opening is larger than the area of ​​the second opening. And / or, the second heat dissipation hole has a third opening close to the first plug interface and a fourth opening away from the first plug interface, and the area of ​​the third opening is larger than the area of ​​the fourth opening.

[0011] Since the first heat dissipation hole has a first opening close to the first plug interface and a second opening away from the first plug interface, in this way, during the use of the drawer-type circuit breaker, the heat generated at the clamping structure first enters the first opening along with the flow of gas. And because the area of ​​the first opening is larger than the area of ​​the second opening, the gas carrying heat can enter the first opening conveniently, thereby improving the efficiency of the gas entering the first heat dissipation hole, accelerating the rate of gas flow, and thus reducing the temperature rise generated at the clamping structure, and improving the heat dissipation efficiency of the bridge-type clamping component. The function of the second heat dissipation hole is similar to that of the first heat dissipation hole, and will not be repeated here.

[0012] In some possible implementations, the contact support includes a connecting plate and two fixed plates arranged at intervals, the two fixed plates are connected to the connecting plate, the clamping structure is located between the two fixed plates, and the second heat dissipation hole is arranged on the connecting plate and / or the fixed plate.

[0013] During the use of the drawer-type circuit breaker, the heat generated at the clamping structure can move away from the clamping structure through the second heat dissipation hole along with the air flow, thereby reducing the temperature rise generated at the clamping structure and improving the heat dissipation efficiency of the bridge-type clamping component.

[0014] In some possible implementations, the second end of the clamping structure has a second plug interface, the opening direction of the second plug interface is opposite to the opening direction of the first plug interface, and the second plug interface can be connected to a second busbar on the switch device.

[0015] The first plug interface of the clamping structure can be plugged into the first busbar, and the second end of the clamping structure can be plugged into the second busbar, so the second busbar can be electrically connected to the first busbar through the clamping structure. And because the first busbar is connected to the circuit, the second busbar can be electrically connected to the circuit through the first busbar.

[0016] In some possible implementations, the inner wall of the first plug interface contacts the surface of the first busbar. And / or, when the second busbar is inserted into the second plug interface, the inner wall of the second plug interface contacts the surface of the second busbar.

[0017] Compared with the existing bridge-type clamping component, the inner wall of the first plug interface contacts the first busbar line, and the inner wall of the second plug interface contacts the second busbar line. In the example of the present application, the inner wall of the first plug interface contacts the first busbar surface, which increases the contact area between the inner wall of the first plug interface and the first busbar, reduces the temperature rise generated at the contact point between the inner wall of the first plug interface and the first busbar, and reduces the temperature rise of the bridge-type clamping component. The inner wall of the second plug interface contacts the second busbar surface, which increases the contact area between the inner wall of the second plug interface and the second busbar, reduces the temperature rise generated at the contact point between the inner wall of the second plug interface and the second busbar, and reduces the temperature rise of the bridge-type clamping component.

[0018] In some possible implementations, a connecting groove is provided on an outer wall of the first busbar, and a connecting protrusion is provided on an inner wall of the first plug interface, and the connecting protrusion can be abutted into the connecting groove.

[0019] A connecting groove is provided on the outer wall of the first busbar, a connecting protrusion is provided on the inner wall of the first plug interface, and the first plug interface is arranged on the contact body. Therefore, a reliable connection between the first busbar and the contact body can be achieved through the cooperation of the connecting groove and the connecting protrusion.

[0020] In some possible implementations, when the second plug interface is plugged into the second busbar, the connection protrusion on the first plug interface can rotate relative to the connection groove. The contact surfaces of the connection groove and the connection protrusion are both arc surfaces, and the connection protrusion and the connection groove are maintained in surface contact during rotation.

[0021] During the process of connecting the second plug interface to the second busbar, the inner wall of the first plug interface will exert a force on the first busbar. Since the contact surfaces of the connecting groove and the connecting protrusion are both arc surfaces, the connecting protrusion can rotate relative to the connecting groove under the action of the force, thereby reducing the possibility of the connecting protrusion detaching from the connecting groove and ensuring the connection reliability between the connecting protrusion and the connecting groove.

[0022] By setting the contact surfaces of the connecting groove and the connecting protrusion to be arc surfaces, the connecting protrusion and the connecting groove can always maintain surface contact during the rotation of the connecting protrusion relative to the connecting groove, thereby reducing the heat generated by the connecting protrusion and the connecting groove.

[0023] In some possible implementations, at least two limiting edges are provided on the first busbar, and the connecting groove is located between two adjacent limiting edges.

[0024] By providing the limiting edge, the area of ​​the connecting groove can be increased, the contact area between the connecting groove and the connecting protrusion can be increased, and the possibility of the connecting protrusion being separated from the connecting groove can be reduced.

[0025] In a second aspect, the present application provides a drawer-type circuit breaker, which includes a drawer seat, a circuit breaker body, and a bridge-type clamping component provided in each possible implementation of the first aspect. The bridge-type clamping component connects the drawer seat and the circuit breaker body.

[0026] The beneficial effects of the drawer-type circuit breaker provided in the second aspect and each possible design of the second aspect can refer to the beneficial effects brought about by the first aspect and each possible implementation method of the first aspect, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the structure of a drawer-type circuit breaker provided as an example of this application.

[0028] Figure 2 A schematic structural diagram of a bridge-type clamping component provided as an example of this application.

[0029] Figure 3 A schematic diagram of the structure of a support frame provided for the example of this application.

[0030] Figure 4 A schematic diagram of the structure of a contact body provided for example in this application.

[0031] Figure 5 A schematic structural diagram of a contact bracket from a first perspective provided as an example in this application.

[0032] Figure 6 A schematic structural diagram of a contact support from a second viewing angle provided in the example of this application.

[0033] Figure 7 for Figure 6 Cross-sectional view at AA in the middle.

[0034] Figure 8 for Figure 7 An enlarged schematic diagram of .

[0035] Fig. 9 A schematic diagram of the cooperation between a bridge-type clamping component and a second busbar provided in an example of this application.

[0036] Fig.10 A schematic diagram of the structure of a first busbar provided as an example of this application.

[0037] Description of reference numerals:

[0038] 100, bridge-type clamping component; 110, support frame; 111, first connecting portion; 112, heat dissipation portion; 1121, first heat dissipation hole; 113, second connecting portion; 120, first busbar; 121, connecting groove; 122, limiting edge; 130, contact body; 131, contact bracket; 1311, second heat dissipation hole; 1312, fixing plate; 1313, connecting plate; 132, clamping structure; 133, first plug interface; 134, second plug interface; 200, drawer seat; 300, second busbar; K1, third opening; K2, fourth opening. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the examples of this application clearer, the technical solution in the examples of this application will be clearly and completely described below in conjunction with the drawings in the examples of this application. Obviously, the described examples are part of the examples of this application, not all of them. Based on the examples in this application, all other examples obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of the application herein are only for the purpose of describing specific examples and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover non-exclusive inclusions.

[0041] Reference to "examples" herein means that a particular feature, structure, or characteristic described in conjunction with the examples may be included in at least one example of the present application. The appearance of the phrase "example" in various locations in the specification does not necessarily refer to the same example, nor is it an independent or alternative example that is mutually exclusive with other examples. It is explicitly and implicitly understood by those skilled in the art that the examples described herein may be combined with other examples.

[0042] The term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0043] The directional words appearing in the following description are all directions shown in the drawings, and do not limit the specific structure of the bridge-type clamping component of the present application.

[0044] In addition, the terms "first", "second", etc. in the specification and claims of this application or the above-mentioned 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.

[0045] In the description of the present application, unless otherwise specified, "plurality" means more than two (including two), and similarly, "multiple groups" means more than two groups (including two).

[0046] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, the "connection" or "connection" of a mechanical structure may refer to a physical connection. For example, the physical connection may be a fixed connection, such as a fixed connection through a barrier, such as a fixed connection through screws, bolts or other barrier; the physical connection may also be a detachable connection, such as a mutual snap-on or snap-fit ​​connection; the physical connection may also be an integral connection, such as a connection formed by welding, bonding or integral molding. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0047] Bridge contacts are widely used in switching devices such as relays, contactors, and circuit breakers. Whether the switching device can be used normally depends largely on the performance of the contact structure.

[0048] Taking the drawer type circuit breaker in the circuit breaker as an example, the drawer type circuit breaker may include a drawer seat, a bridge type clamping component and a circuit breaker body, one end of the bridge type clamping component is connected to the drawer seat, and the other end of the bridge type clamping component is connected to the circuit breaker body, and the circuit breaker body can be shaken out of the drawer seat, so that the circuit breaker body is disconnected from the drawer seat, so as to repair or replace the circuit breaker body. The bridge type clamping component may include a bridge type contact and a first busbar of the drawer seat.

[0049] Based on the structure of the existing bridge-type clamping component, the heat generated between the bridge-type contact in the bridge-type clamping component and the first busbar of the drawer seat is inconvenient to dissipate from the contact portion between the bridge-type contact and the first busbar of the drawer seat. During the use of the drawer-type circuit breaker, the temperature rise of the contact portion between the bridge-type contact and the first busbar of the drawer seat is relatively high, which easily affects the reliability of the use of the drawer-type circuit breaker.

[0050] Based on the above, the present application example provides a bridge-type clamping component and a drawer-type circuit breaker.

[0051] In order to enable persons skilled in the art to better understand the present application, the bridge-type clamping component and the drawer-type circuit breaker provided in the example of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0052] For example, Figure 1 For a structural diagram of a drawer-type circuit breaker provided for this application example, please refer to Figure 1 The present application provides a drawer-type circuit breaker, which includes a drawer seat 200, a circuit breaker body, and a bridge-type clamping component 100. The bridge-type clamping component 100 connects the drawer seat 200 and the circuit breaker body to achieve electrical connection between the drawer seat 200 and the circuit breaker body.

[0053] The drawer seat 200 may have a accommodating cavity, and the circuit breaker body may be installed in the accommodating cavity, so as to facilitate the electrical connection between the circuit breaker body and the drawer seat 200. In the event of a failure of the circuit breaker body, the circuit breaker body may be shaken out of the accommodating cavity, and the failed circuit breaker body may be replaced with a spare circuit breaker body, so as to improve the maintenance efficiency of the drawer-type circuit breaker. The drawer-type circuit breaker may also be used as an isolator. In the event that a circuit or equipment needs to be repaired, the circuit breaker body may be shaken out of the accommodating cavity so that the circuit is segmented and isolated, so as to ensure the safety of the maintenance personnel during the maintenance of the circuit or equipment. Here, the circuit refers to the circuit electrically connected to the drawer-type circuit breaker, and the equipment refers to the equipment directly or indirectly electrically connected to the drawer-type circuit breaker.

[0054] The structure of the circuit breaker body in the example of the present application is consistent with the structure of the circuit breaker body in the prior art, and will not be described in detail here. The specific structure of the bridge-type clamping component 100 is described in detail below, and will not be described in detail here.

[0055] Next, the bridge-type clamping component 100 mentioned in the drawer-type circuit breaker is described in detail.

[0056] Exemplarily, the present application example provides a bridge-type clamping component, Figure 2 A schematic diagram of the structure of a bridge-type clamping component provided as an example of this application, Figure 3 For a structural diagram of a support frame provided for this application example, please refer to Figure 2 and Figure 3 , the bridge-type clamping component 100 is installed on the drawer seat 200. The bridge-type clamping component 100 may include a support frame 110, a first busbar 120 and a contact body 130. The support frame 110 is connected to the drawer seat 200, the first busbar 120 is connected to the support frame 110, and the contact body 130 is connected to the first busbar 120. The support frame 110 includes a first connection portion 111, a heat dissipation portion 112 and a second connection portion 113. The first connection portion 111 is connected to the drawer seat 200, and both sides of the heat dissipation portion 112 are respectively connected to the first connection portion 111 and the second connection portion 113. The second connection portion 113 is connected to the first busbar 120, and at least one first heat dissipation hole 1121 is provided on the heat dissipation portion 112.

[0057] The bridge-type clamping component 100 can be applied to switch devices such as circuit breakers, contactors, relays, and disconnectors. The present application example only describes the drawer-type circuit breaker in the circuit breaker as an example.

[0058] The contact body 130 may be a bridge-type contact, and the contact body 130 may include a plurality of conductive sheets. The contact body 130 may also include a plurality of conductive sheets and spacers, and the spacers may be disposed between the conductive sheets.

[0059] There are many ways to arrange the spacer. For example, the spacer can be arranged between adjacent conductive sheets. Two conductive sheets can be grouped to form a conductive group, and the spacer can be arranged between adjacent conductive groups. Each conductive group can also include three, four, or even more conductive sheets, which is not limited in this example of the present application.

[0060] By providing the spacer, the heat dissipation area of ​​the conductive sheet can be increased, thereby improving the heat dissipation efficiency of the conductive sheet, and reducing the temperature rise generated at the conductive sheet during the use of the drawer-type circuit breaker.

[0061] The contact body 130 can be connected to the first busbar 120. One end of the first busbar 120 can be plugged into the contact body 130, and the first busbar 120 can also be connected to the contact body 130 by threaded connection or other methods. Part of the first busbar 120 can extend out of the drawer seat 200 to facilitate the electrical connection of a wire or other electrical connection structure to the first busbar 120, and the first busbar 120 can be electrically connected to the circuit through a wire or other conductive structure. The other end of the contact body 130 can be electrically connected to the circuit breaker body by clamping, plugging or close contact, so that the circuit breaker body can be electrically connected to the circuit through the contact body 130.

[0062] The support frame 110 may be connected to the inner wall of the accommodating cavity of the drawer seat 200 , and one or more support frames 110 may be provided.

[0063] When there is only one support frame 110, the support frame 110 can be set on any side of the first busbar 120, one end of the support frame 110 can be fixedly connected to the first busbar 120, and the other end of the support frame 110 can be fixedly connected to the inner wall of the accommodating cavity, as long as the support frame 110 does not affect the normal use of the first busbar 120.

[0064] There may also be multiple support frames 110, and a portion of the multiple support frames 110 may be installed on the first side of the first busbar 120, and another portion of the multiple support frames 110 may be installed on the second side of the first busbar 120. The first side and the second side of the first busbar 120 may be arranged opposite to each other, and the first side and the second side of the first busbar 120 may also be arranged adjacent to each other. This application example does not impose any specific limitation on this.

[0065] Exemplarily, two support frames 110 may be provided, one support frame 110 may be provided on the first side of the first busbar 120 , and the other support frame 110 may be provided on the second side of the first busbar 120 . The first side and the second side of the first busbar 120 may be provided opposite to each other.

[0066] The support frame 110 may be made of metal materials, such as aluminum alloy, stainless steel, etc. The support frame 110 may also be made of insulating materials, such as polyvinyl chloride, polycarbonate, etc.

[0067] The support frame 110 may include a first connection portion 111, a heat dissipation portion 112, and a second connection portion 113. One side of the first connection portion 111 may be connected to the drawer seat 200 by riveting, threading, or the like, and the other side of the first connection portion 111 may be connected to one side of the heat dissipation portion 112. The drawer seat 200 and the heat dissipation portion 112 may be connected to opposite sides of the first connection portion 111, respectively, or the drawer seat 200 and the heat dissipation portion 112 may be connected to adjacent sides of the first connection portion 111, respectively. One side of the second connection part 113 can be connected to the other side of the heat dissipation part 112, the second connection part 113 and the first connection part 111 can be connected to the two opposite sides of the heat dissipation part 112, the second connection part 113 and the first connection part 111 can also be connected to the two adjacent sides of the heat dissipation part 112, the other side of the second connection part 113 is connected to the first busbar 120 by riveting, threading or other connection methods, the first busbar 120 and the heat dissipation part 112 can be connected to the two adjacent sides of the second connection part 113, the first busbar 120 and the heat dissipation part 112 can also be connected to the two opposite sides of the second connection part 113. As long as the support frame 110 can realize the connection between the first busbar 120 and the drawer seat 200, the specific structure of the support frame 110 is not limited in this application example.

[0068] At least one first heat dissipation hole 1121 is provided on the heat dissipation portion 112. There may be one, two, or even more first heat dissipation holes 1121. The shape corresponding to the first heat dissipation holes 1121 may be a cylindrical structure, a prismatic structure, or a combination of multiple shapes and structures.

[0069] Exemplarily, the first heat dissipation hole 1121 may be formed by connecting a plurality of circular holes, or the first heat dissipation hole 1121 may be an oblong hole, an oblong arc hole, or the like. The example of the present application does not limit the specific implementation of the first heat dissipation hole 1121.

[0070] The first heat dissipation hole 1121 can be arranged as flush as possible with the contact position between the contact body 130 and the first busbar 120, so that the heat generated at the contact position between the contact body 130 and the first busbar 120 can be moved to the second chamber through the first heat dissipation hole 1121. The specific arrangement position of the first heat dissipation hole 1121 is not limited in this application example.

[0071] The support frame 110 can divide the accommodating chamber of the drawer seat 200 into a first chamber where the contact body 130 is set and a second chamber where the contact body 130 is not set. During the operation of the drawer-type circuit breaker, the heat generated at the contact position between the circuit breaker body and the first busbar 120 causes the gas in the first chamber to expand due to the heat, thereby making the gas pressure in the first chamber greater than the gas pressure in the second chamber, and the gas in the first chamber moves to the second chamber through the first heat dissipation hole 1121. The gas in the second chamber can also move toward the first chamber through the first heat dissipation hole 1121 to improve the heat dissipation efficiency at the contact position between the circuit breaker body and the first busbar 120, reduce the temperature rise at the contact position between the circuit breaker body and the first busbar 120, and ensure the reliability of the use of the drawer-type circuit breaker.

[0072] Based on the drawer type circuit breaker provided in the above example, Figure 4 A schematic diagram of the structure of a contact body provided for the example of this application, Figure 5 For a schematic diagram of the structure of a contact support from a first perspective provided in this application example, please refer to Figure 4 and Figure 5 The contact body 130 includes a contact support 131 and a clamping structure 132 mounted on the contact support 131, and a first end of the clamping structure 132 clamps the first busbar 120. The contact support 131 is provided with at least one second heat dissipation hole 1311.

[0073] The contact support 131 can be made of a metal material, or a non-metal material with a certain strength, as long as the reliability of the contact support 131 can be guaranteed. The clamping structure 132 can be composed of the multiple conductive sheets mentioned above, or the clamping structure 132 can be composed of the multiple conductive sheets and spacers mentioned above.

[0074] The contact support 131 may include two plate-like structures arranged at intervals, and the two plate-like structures may be connected by a connecting rod or a connecting plate. The contact support 131 may be generally in a "U" shape, a "凵" shape, a "π" shape, etc., as long as the contact support 131 can install the clamping structure 132. The specific implementation manner of the contact support 131 is not limited in this application example. Relative to the clamping structure 132, the connecting rod or the connecting plate may be located on the side of the clamping structure 132背离 the support frame 110, or may be located on the side facing the support frame 110. This application example only describes the case where the connecting rod or the connecting plate is located on the side of the clamping structure 132背离 the support frame 110.

[0075] In the case where the two plate-like structures are connected by a connecting rod, the second heat dissipation holes 1311 may be provided on the two plate-like structures arranged at intervals. In the case where the two plate-like structures are connected by a connecting plate, the second heat dissipation holes 1311 may be provided only on the connecting plate, or may be provided only on the two plate-like structures, or may be provided on both the connecting plate and the two plate-like structures arranged at intervals.

[0076] The contact support 131 can divide the accommodation cavity of the drawer seat 200 into a third chamber where the support frame 110 is provided and a fourth chamber where the support frame 110 is not provided. During the operation of the drawer-type circuit breaker, the heat generated at the contact position between the circuit breaker body and the first busbar 120 causes the gas in the third chamber to expand due to heat, and then the gas pressure in the third chamber is greater than the gas pressure in the fourth chamber. The gas in the third chamber moves to the fourth chamber through the second heat dissipation holes 1311, so that the gas in the third chamber moves to the fourth chamber. The gas in the fourth chamber can also move towards the third chamber through the second heat dissipation holes 1311 to improve the heat dissipation efficiency at the contact position between the circuit breaker body and the first busbar 120, reduce the temperature rise at the contact position between the circuit breaker body and the first busbar 120, and ensure the use reliability of the drawer-type circuit breaker.

[0077] In summary, during the use of the drawer-type circuit breaker, the heat generated at the clamping structure 132 can move away from the clamping structure 132 through the second heat dissipation holes 1311 along with the air flow, reduce the temperature rise generated at the clamping structure 132, and improve the heat dissipation efficiency of the bridge-type clamping component 100.

[0078] Based on the bridge-type clamping component 100 provided in the above example, Figure 6 This is a schematic structural diagram of a second perspective of a contact support provided in this application example, Figure 7 is Figure 6 the sectional view taken along line A-A in Figure 8 is Figure 7 the enlarged schematic diagram in Figure 2 、 Figure 6 to Figure 8The first end of the clamping structure 132 has a first plug-in port 133, and part of the first busbar 120 is inserted into the first plug-in port 133. The first heat dissipation hole 1121 has a first opening close to the first plug-in port 133 and a second opening away from the first plug-in port 133, and the area of ​​the first opening is larger than the area of ​​the second opening (not shown in the figure). And / or, the second heat dissipation hole 1311 has a third opening K1 close to the first plug-in port 133 and a fourth opening K2 away from the first plug-in port 133, and the area of ​​the third opening K1 is larger than the area of ​​the fourth opening K2.

[0079] There are many ways to make the area of ​​the first opening larger than the area of ​​the second opening. For example, a chamfer may be provided at the first opening so that the area of ​​the first opening is larger than the area of ​​the second opening. Alternatively, the opening area may be gradually reduced along the direction from the first opening to the second opening, thereby making the area of ​​the first opening larger than the area of ​​the second opening. Other methods may also be used to make the area of ​​the first opening larger than the area of ​​the second opening, and this application example does not limit this.

[0080] The implementation method of the second heat dissipation hole 1311 is similar to the implementation method of the first heat dissipation hole 1121, and will not be repeated here.

[0081] The inner wall of the first plug-in port 133 may be in line contact with the first busbar 120 , or the first plug-in port 133 may be in surface contact with the first busbar 120 .

[0082] The first busbar 120 is inserted into the first plug interface 133 of the clamping structure 132, thereby realizing the connection between the clamping structure 132 and the first busbar 120 and fixing the relative positions of the clamping structure 132 and the first busbar 120. Since the first busbar 120 is fixed in the drawer seat 200 through the support frame 110, the clamping structure 132 can be fixed in the drawer seat 200 through the first busbar 120 and the support frame 110.

[0083] Exemplarily, the extension direction of the first heat dissipation hole 1121 can be parallel to the opening direction of the first plug interface 133. The first heat dissipation hole 1121 has a first opening close to the first plug interface 133 and a second opening away from the first plug interface 133. In this way, during the use of the drawer-type circuit breaker, the heat generated at the clamping structure 132 first enters the first opening along with the flow of gas. Because the area of ​​the first opening is larger than the area of ​​the second opening, the heat generated at the clamping structure 132 can enter the first opening conveniently, which can improve the efficiency of the gas entering the first heat dissipation hole 1121, speed up the gas flow rate, and thus reduce the temperature rise generated at the clamping structure 132, thereby improving the heat dissipation efficiency of the bridge-type clamping component 100.

[0084] In the process of the heat-carrying gas moving from the first opening toward the second opening, because the area of ​​the first opening is larger than that of the second opening, the area of ​​the second opening is smaller than that of the first opening. Therefore, the volume of the gas becomes smaller and the pressure increases, which is beneficial to increase the gas flow rate and further improve the heat dissipation efficiency of the bridge-type clamping component 100.

[0085] Exemplarily, the second heat dissipation hole 1311 has a third opening K1 close to the first plug interface 133 and a fourth opening K2 away from the first plug interface 133. In this way, during the use of the drawer-type circuit breaker, the heat generated at the clamping structure 132 first enters the third opening K1 along with the flow of gas. Because the area of ​​the third opening K1 is larger than the area of ​​the fourth opening K2, the heat generated at the clamping structure 132 can enter the third opening K1 conveniently, which can improve the efficiency of gas entering the second heat dissipation hole 1311, speed up the gas flow rate, and thus reduce the temperature rise generated at the clamping structure 132, thereby improving the heat dissipation efficiency of the bridge-type clamping component 100.

[0086] In the process of gas moving from the third opening K1 toward the fourth opening K2, because the area of ​​the third opening K1 is larger than that of the fourth opening K2, the area of ​​the fourth opening K2 is smaller than that of the third opening K1, the volume of the gas becomes smaller and the pressure increases, which is beneficial to increase the gas flow rate and further improve the heat dissipation efficiency of the bridge-type clamping component 100.

[0087] For example, in a bridge-type clamping component 100, the first heat dissipation hole 1121 has a first opening close to the first plug interface 133 and a second opening away from the first plug interface 133, and the second heat dissipation hole 1311 has a third opening K1 close to the first plug interface 133 and a fourth opening K2 away from the first plug interface 133. The area of ​​the first opening can be set to be larger than the area of ​​the second opening, and the area of ​​the third opening K1 can be larger than the area of ​​the fourth opening K2. In this way, the flow rate of the gas can be accelerated through the first plug interface 133 and the second plug interface 134 at the same time, further reducing the temperature rise generated at the clamping structure 132, and improving the heat dissipation efficiency of the bridge-type clamping component 100.

[0088] Based on the bridge-type clamping component 100 provided in the above example, Figure 8 For a schematic diagram of the structure of a contact bracket provided for this application example, please refer to Figure 8 The contact support 131 may include a connecting plate 1313 and two fixed plates 1312 arranged at intervals, the two fixed plates 1312 are both connected to the connecting plate 1313, the clamping structure 132 is located between the two fixed plates 1312, and the second heat dissipation hole 1311 is set on the connecting plate 1313 and / or the fixed plate 1312.

[0089] The two fixing plates 1312 can be connected to the two ends of the connecting plate 1313 respectively, or the two fixing plates 1312 can be connected to the middle of the connecting plate 1313 , as long as the two fixing plates 1312 can cooperate with each other to clamp the clamping structure 132 .

[0090] The second heat dissipation hole 1311 can be provided on the fixing plate 1312. The second heat dissipation hole 1311 can be provided on the connecting plate 1313, for example, the second heat dissipation hole 1311 can be provided on any one of the two connecting plates 1313, or the second heat dissipation hole 1311 can be provided on both connecting plates 1313. The second heat dissipation hole 1311 can also be provided on both the fixing plate 1312 and the connecting plate 1313.

[0091] During the use of the drawer-type circuit breaker, the heat generated at the clamping structure 132 can move away from the clamping structure 132 along with the airflow through the second heat dissipation hole 1311, thereby reducing the temperature rise generated at the clamping structure 132 and improving the heat dissipation efficiency of the bridge-type clamping component 100.

[0092] Based on the bridge-type clamping component 100 provided in the above example, Fig. 9 For a schematic diagram of the cooperation between a bridge-type clamping component and a second busbar provided in this application example, please refer to Figure 3 and Fig. 9 The second end of the clamping structure 132 has a second plug-in port 134 , the opening direction of the second plug-in port 134 is opposite to the opening direction of the first plug-in port 133 , and the second plug-in port 134 can be connected to the second busbar 300 on the switch device.

[0093] The switch device may be any of a circuit breaker, a contactor, a relay, an isolating switch, etc. The second busbar 300 may be changed according to the switch device. The present application example only takes the switch device as a drawer-type circuit breaker and the second busbar 300 as the busbar corresponding to the circuit breaker body as an example for explanation.

[0094] Since the clamping structure 132 is made of conductive material, the first plug interface 133 of the clamping structure 132 can be plugged into the first busbar 120, and the second end of the clamping structure 132 can be plugged into the second busbar 300, so the electrical connection between the second busbar 300 and the first busbar 120 can be achieved. Since the first busbar 120 is connected to the circuit, the electrical connection between the second busbar 300 and the circuit can be achieved through the first busbar 120.

[0095] Based on the bridge-type clamping component 100 provided in the above example, please refer to Fig. 9 , the inner wall of the first plug port 133 is in surface contact with the first busbar 120 . And / or, when the second busbar 300 is inserted into the second plug port 134 , the inner wall of the second plug port 134 is in surface contact with the second busbar 300 .

[0096] The surface contact between the inner wall of the first plug port 133 and the first busbar 120 is similar to the surface contact between the inner wall of the second plug port 134 and the second busbar 300. Next, only the surface contact between the inner wall of the first plug port 133 and the first busbar 120 is described as an example.

[0097] The contact surface between the inner wall of the first plug port 133 and the first busbar 120 can be a plane or an arc surface. The inner wall of the first plug port 133 can directly contact the first busbar 120 to clamp the first busbar 120. The first busbar 120 can also be provided with a groove, and the inner wall of the first plug port 133 is provided with a protrusion, and the surface contact between the first busbar 120 and the inner wall of the first plug port 133 is achieved by the cooperation of the protrusion and the groove.

[0098] Based on the law of resistance, the contact resistance between different conductors is inversely proportional to the contact area. Based on Joule's law, when the current is constant, the heat generated at the contact point of different conductors is inversely proportional to the contact area.

[0099] Compared with the existing bridge-type clamping component, the inner wall of the first plug interface contacts the first busbar line, and the inner wall of the second plug interface contacts the second busbar line. In the example of the present application, the inner wall of the first plug interface 133 contacts the first busbar 120, which increases the contact area between the inner wall of the first plug interface 133 and the first busbar 120, reduces the temperature rise generated at the contact point between the inner wall of the first plug interface 133 and the first busbar 120, and reduces the temperature rise generated at the bridge-type clamping component 100. The inner wall of the second plug interface 134 contacts the second busbar 300, which increases the contact area between the inner wall of the second plug interface 134 and the second busbar 300, reduces the temperature rise generated at the contact point between the inner wall of the second plug interface 134 and the second busbar 300, and reduces the temperature rise generated at the bridge-type clamping component 100.

[0100] Based on the bridge-type clamping component 100 provided in the above example, Fig.10 For a schematic diagram of the structure of the first busbar provided in this application example, please refer to Fig. 9 and Fig.10 A connecting groove 121 is provided on the outer wall of the first busbar 120 , and a connecting protrusion is provided on the inner wall of the first plug port 133 , and the connecting protrusion can be abutted against the connecting groove 121 .

[0101] Since the opening directions of the first plug interface 133 and the second plug interface 134 are opposite, and the first plug interface 133 and the second plug interface 134 are both arranged on the contact body 130, during the process of inserting the second busbar 300 into the second plug interface 134, the area of ​​the second plug interface 134 becomes larger, and correspondingly, the area of ​​the first plug interface 133 decreases. Since the first busbar 120 is plugged into the first plug interface 133, the inner wall of the first plug interface 133 can abut against the first busbar 120, and the connecting protrusion can abut against the connecting groove 121.

[0102] The surface of the middle end of the connecting protrusion can be flat or curved, the surface of the connecting groove 121 and the surface facing the connecting protrusion can be flat or curved, the surface of the middle end of the connecting protrusion and the surface of the connecting groove 121 facing the connecting protrusion can be the same or different, as long as the connection reliability between the first busbar 120 and the first plug interface 133 is achieved.

[0103] A connecting groove 121 is provided on the outer wall of the first busbar 120, a connecting protrusion is provided on the inner wall of the first plug port 133, and the first plug port 133 is arranged on the contact body 130. Therefore, a reliable connection between the first busbar 120 and the contact body 130 can be achieved through the cooperation between the connecting groove 121 and the connecting protrusion.

[0104] Based on the bridge-type clamping component 100 provided in the above example, please refer to Fig. 9 During the process of plugging the second plug port 134 into the second busbar 300, the connection protrusion on the first plug port 133 can rotate relative to the connection groove 121. The contact surfaces of the connection groove 121 and the connection protrusion are both arc surfaces, and the connection protrusion and the connection groove are maintained in surface contact during the rotation process.

[0105] When the second plug-in port 134 is plugged into the second busbar 300, the inner wall of the first plug-in port 133 applies a force to the first busbar 120 (please refer to the above for the specific description). Since the contact surfaces of the connecting groove 121 and the connecting protrusion are both arc-shaped, the connecting protrusion can rotate relative to the connecting groove 121 under the action of the force, thereby reducing the possibility of the connecting protrusion detaching from the connecting groove 121 and ensuring the connection reliability between the connecting protrusion and the connecting groove 121.

[0106] By setting the contact surfaces of the connecting groove 121 and the connecting protrusion to be arc surfaces, the connecting protrusion and the connecting groove 121 can always maintain surface contact during the rotation of the connecting protrusion relative to the connecting groove 121, thereby reducing the heat generated by the connecting protrusion and the connecting groove 121.

[0107] Based on the bridge-type clamping component 100 provided in the above example, please refer to Fig.10At least two limiting edges 122 are provided on the first busbar 120 , and the connecting groove 121 is located between two adjacent limiting edges 122 .

[0108] The connecting groove 121 may be in contact with the limiting edge 122 , or there may be a gap between the connecting groove 121 and the limiting edge 122 . The example of the present application is only described by taking the example that the connecting groove 121 is in contact with the limiting edge 122 .

[0109] By providing the limiting edge 122 , the area of ​​the connecting groove 121 can be increased, the contact area between the connecting groove 121 and the connecting protrusion can be increased, and the possibility of the connecting protrusion being separated from the connecting groove 121 can be reduced.

[0110] A heat dissipation surface may be provided on the side of the limiting edge 122 away from the connecting groove 121 , and the heat dissipation surface may be inclined in a direction away from the connecting groove 121 . By providing the heat dissipation surface, the heat dissipation area at the first busbar 120 may be increased, thereby improving the heat dissipation efficiency at the first busbar 120 .

[0111] Finally, it should be noted that the above embodiments are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A bridge-type clamping component, characterized in that: Installed on the drawer seat, the bridge-type clamping component includes a support frame, a first busbar and a contact body; The support frame is connected to the drawer seat, the first busbar is connected to the support frame, and the contact body is connected to the first busbar; The support frame includes a first connecting part, a heat dissipation part and a second connecting part, the first connecting part is connected to the drawer seat, the two sides of the heat dissipation part are respectively connected to the first connecting part and the second connecting part, the second connecting part is connected to the first bus bar, and at least one first heat dissipation hole is provided on the heat dissipation part.

2. The bridge-type clamping component according to claim 1, characterized in that: The contact body comprises a contact support and a clamping structure mounted on the contact support, wherein a first end of the clamping structure clamps the first busbar; The contact support is provided with at least one second heat dissipation hole.

3. The bridge-type clamping component according to claim 2, characterized in that: The first end of the clamping structure has a first plug-in interface, and part of the first busbar is inserted into the first plug-in interface; The first heat dissipation hole has a first opening close to the first plug interface and a second opening away from the first plug interface, and the area of ​​the first opening is larger than the area of ​​the second opening; and / or; The second heat dissipation hole has a third opening close to the first plug interface and a fourth opening away from the first plug interface, and an area of ​​the third opening is larger than an area of ​​the fourth opening.

4. The bridge-type clamping component according to claim 2, characterized in that: The contact support includes a connecting plate and two fixed plates arranged at intervals, the two fixed plates are connected to the connecting plate, the clamping structure is located between the two fixed plates, and the second heat dissipation hole is arranged on the connecting plate and / or the fixed plate.

5. The bridge-type clamping member according to claim 3, characterized in that: The second end of the clamping structure has a second plug interface, the opening direction of the second plug interface is opposite to the opening direction of the first plug interface, and the second plug interface can be connected to a second busbar on the switch device.

6. The bridge-type clamping member according to claim 5, characterized in that: The inner wall of the first plug interface contacts the first busbar surface; and / or, When the second busbar is inserted into the second plug port, the inner wall of the second plug port contacts the surface of the second busbar.

7. The bridge-type clamping member according to claim 6, characterized in that: A connecting groove is provided on the outer wall of the first busbar, and a connecting protrusion is provided on the inner wall of the first plug interface. The connecting protrusion can be abutted against the connecting groove.

8. The bridge-type clamping member according to claim 7, characterized in that: During the process of the second plug interface being plugged into the second bus bar, the connection protrusion on the first plug interface can rotate relative to the connection groove; The contact surfaces of the connecting groove and the connecting protrusion are both arc surfaces, and the connecting protrusion and the connecting groove are maintained in surface contact during the rotation process.

9. The bridge-type clamping member according to claim 7 or 8, characterized in that: At least two limiting edges are arranged on the first busbar, and the connecting groove is located between two adjacent limiting edges.

10. A drawer type circuit breaker, characterized in that: It comprises a drawer seat, a circuit breaker body and a bridge-type clamping component as described in any one of claims 1 to 9, wherein the bridge-type clamping component connects the drawer seat and the circuit breaker body.

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