Bridge type contact and drawer type circuit breaker

Abstract

The utility model provides a bridge type contact and a drawer type circuit breaker, and belongs to the technical field of electrical equipment. The bridge-type contact provided by the utility model comprises a first contact chip group and a second contact chip group. The first contact piece group comprises a first clamping part. The second contact piece group comprises a second clamping part. The first clamping part and the second clamping part abut against the busbar, and the part, abutting against the busbar, of the first clamping part and the part, abutting against the busbar, of the second clamping part are staggered. When the busbar is connected with the bridge-type contact, the portion, abutting against the busbar, of the first clamping part and the portion, abutting against the busbar, of the second clamping part are staggered, and therefore the contact portions of the bridge-type contact and the busbar can be dispersed. Compared with the prior art that the contact parts of the bridge-type contact and the busbar are relatively concentrated, the heat dissipation of the contact parts of the bridge-type contact and the busbar is facilitated after the contact parts of the bridge-type contact and the busbar are dispersed, so that the temperature rise at the busbar can be reduced.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and in particular to a bridge-type contact and a drawer-type circuit breaker. Background Technology

[0002] A drawer-type circuit breaker is a modularly designed circuit breaker used for circuit protection and control. It typically consists of a circuit breaker body and a drawer base. The circuit breaker body is slidably connected to the drawer base and can be rolled out from within it. The drawer base contains bridge-type contacts, and the circuit breaker body is generally connected to these contacts via busbars, allowing the circuit breaker body to communicate with external conductive components.

[0003] In the prior art, the busbar of the drawer-type circuit breaker is prone to overheating, which can affect the internal components of the drawer-type circuit breaker and thus affect the overall service life of the drawer-type circuit breaker. Utility Model Content

[0004] This application provides a bridge-type contact and a drawer-type circuit breaker to reduce the temperature rise at the busbar.

[0005] In a first aspect, this application provides a bridge-type contact, which includes a first contact piece group and a second contact piece group. The first contact piece group includes a first clamping portion. The second contact piece group includes a second clamping portion. Both the first clamping portion and the second clamping portion abut against a busbar, and the portions of the first clamping portion abutting against the busbar and the portions of the second clamping portion abutting against the busbar are offset.

[0006] Through the above-described scheme, this application designs the bridge-type contact as a combination of a first contact piece group and a second contact piece group, enabling the bridge-type contact to form a first clamping portion and a second clamping portion. When the busbar is connected to the bridge-type contact, the parts of the first clamping portion and the second clamping portion that abut against the busbar are staggered, thus dispersing the contact areas between the bridge-type contact and the busbar. Compared to the prior art where the contact areas between the bridge-type contact and the busbar are relatively concentrated, this application, by dispersing the contact areas, is more conducive to heat dissipation at the contact areas, thereby reducing the temperature rise at the busbar and decreasing the probability of excessively high busbar temperatures affecting the internal components of the drawer-type circuit breaker and thus impacting the overall service life of the drawer-type circuit breaker.

[0007] In one possible design, the first contact piece group includes two long contact pieces, with the mutually facing surfaces of the two long contact pieces near the busbar forming a first clamping portion. The second contact piece group includes two short contact pieces, with the mutually facing surfaces of the two short contact pieces near the busbar forming a second clamping portion. During the insertion of the bridge-type contact into the busbar, the first clamping portion contacts the busbar before the second clamping portion.

[0008] The above scheme describes a first contact piece group comprising two long contact pieces, with the surfaces of the two long contact pieces facing each other forming a first clamping portion. This allows the busbar to be clamped using the two long contact pieces, enabling connection between the busbar and the bridge-type contacts. The second contact piece group comprises two short contact pieces, with the surfaces of the two short contact pieces facing each other forming a second clamping portion. This also allows the busbar to be clamped using the two short contact pieces, enabling connection between the busbar and the bridge-type contacts.

[0009] By setting the first contact piece group as a combination of two long contact pieces and the second contact piece group as a combination of two short contact pieces, the first clamping part can abut against the busbar before the second clamping part during the insertion of the bridge-type contact into the busbar, thereby creating a misalignment between the abutment point of the first clamping part and the busbar and the abutment point of the second clamping part and the busbar.

[0010] In one possible design, there are multiple first contact groups and multiple second contact groups. These multiple first contact groups are arranged alternately with the multiple second contact groups.

[0011] With the above solution, since the parts of the first clamping part that abut against the busbar and the parts of the second clamping part that abut against the busbar are misaligned, when multiple first contact piece groups and multiple second contact piece groups are arranged alternately, the abutting points of multiple first clamping parts and multiple second clamping parts are closer to each other, making the force on the busbar more stable. This allows the resistance to the busbar to be more uniform when it enters the bridge-shaped contact, thus improving the reliability of the drawer-type circuit breaker.

[0012] In one possible design, the number of first contact groups and second contact groups is greater than or equal to two. At least two first contact groups are in contact with each other to form a first combination. At least two second contact groups are in contact with each other to form a second combination. A second combination is provided between two adjacent first combinations, or a first combination is provided between two adjacent second combinations.

[0013] With the above scheme, since the first combination can be composed of multiple first contact piece groups, the clamping force of the first combination on the busbar is stronger. Since the second combination can be composed of multiple second contact piece groups, the clamping force of the second combination on the busbar is stronger. This makes the connection between the busbar and the bridge contact more stable, reduces the probability of the bridge contact falling off the busbar, and improves the reliability of the drawer-type circuit breaker.

[0014] In one possible design, the first clamping part contacts the female panel surface, and / or the second clamping part contacts the female panel surface.

[0015] Through the above scheme, the first clamping part contacts the busbar surface. When current flows through the area where the busbar and the first clamping part abut, the current flow area is increased. This increased current flow area reduces the temperature rise at the contact point between the busbar and the first clamping part. Similarly, the second clamping part contacts the busbar surface. When current flows through the area where the busbar and the second clamping part abut, the current flow area is also increased. This increased current flow area further reduces the temperature rise at the contact point between the busbar and the second clamping part. When the temperature rise at the contact point between the busbar and the first clamping part decreases, and / or when the temperature rise at the contact point between the busbar and the second clamping part decreases, the probability of excessively high busbar temperatures affecting the internal components of the drawer-type circuit breaker and thus impacting the overall service life of the drawer-type circuit breaker is reduced.

[0016] In one possible design, the middle portions of the two long contact pieces are connected by a first elastic element, and the middle portions of the two short contact pieces are connected by a second elastic element.

[0017] The above solution connects two long contact pieces using a first elastic element. The elastic force of the first elastic element causes the two long contact pieces to move closer together, forming a first clamping part to clamp the busbar. Connecting the first elastic element to the middle of the two long contact pieces ensures that the clamping force at both ends is the same, allowing the ends of the two long contact pieces furthest from the busbar to clamp the busbar of the drawer-type circuit breaker.

[0018] By connecting two short contact pieces using a second elastic element, the elastic force of the second elastic element can bring the two short contact pieces closer together, thereby forming a second clamping part to clamp the busbar. Connecting the second elastic element to the middle of the two short contact pieces ensures that the clamping force at both ends of the two short contact pieces is the same, so that the ends of the two short contact pieces furthest from the busbar can clamp the busbar of the drawer-type circuit breaker.

[0019] In one possible design, the bridge-type contact also includes spacers. Spacers are provided between adjacent first contact groups and second contact groups.

[0020] With the above solution, when the busbar is connected to the bridge-type contacts, the contact points of the first contact piece group and the second contact piece group are staggered. By setting a spacer between the first contact piece group and the second contact piece group, the probability of mutual interference between adjacent first contact piece groups and second contact piece groups can be reduced, the probability of unstable connection between the busbar and the bridge-type contacts can be reduced, and the reliability of the drawer-type circuit breaker can be improved.

[0021] In one possible design, the bridge-type contact also includes a spacer. Spacers are provided between adjacent first and second assemblies.

[0022] With the above solution, when the busbar is connected to the bridge-type contact, the contact points of the first contact piece group and the second contact piece group are staggered. By setting a spacer between the first contact piece group and the second contact piece group, the probability of mutual interference between adjacent first and second combinations can be reduced, the probability of unstable connection between the busbar and the bridge-type contact can be reduced, and the reliability of the drawer-type circuit breaker can be improved.

[0023] In one possible design, the two long contact pieces have a first tooling groove on the side facing away from the busbar, and the two short contact pieces have a second tooling groove on the side facing away from the busbar. The first tooling groove and the second tooling groove are connected.

[0024] In the above scheme, the two long contact pieces are connected by a first elastic element. When the end of the bridge-type contact furthest from the busbar is connected to the busbar, the ends of the two long contact pieces closest to the busbar need to be brought together so that the ends furthest from the busbar are open. In this case, the first tooling slot allows the operator to apply force more effectively. The two short contact pieces are connected by a second elastic element. When the end of the bridge-type contact furthest from the busbar is connected to the busbar, the ends of the two short contact pieces closest to the busbar need to be brought together so that the ends furthest from the busbar are open. In this case, the second tooling slot allows the operator to apply force more effectively. Because the end of the long contact piece closest to the busbar protrudes beyond the end of the short contact piece closest to the busbar, when the first tooling slot and the second tooling slot are connected, it is even more beneficial for the operator to apply force.

[0025] Secondly, this application provides a drawer-type circuit breaker, which includes a circuit breaker body and the bridge-type contacts mentioned in the first aspect. The circuit breaker body is connected to the bridge-type contacts via a busbar.

[0026] The advantages of the drawer-type circuit breaker provided in the second aspect above can be found in the first aspect and the advantages of various possible embodiments of the first aspect, and will not be repeated here. Attached Figure Description

[0027] Figure 1 Assembly diagram of busbar, bridge contact and busbar provided for embodiments of this application.

[0028] Figure 2 An exploded view of the busbar and bridge-type contacts provided in an embodiment of this application.

[0029] Figure 3 This is a cross-sectional view of a bridge-type contact provided in an embodiment of this application.

[0030] Figure 4 This is a schematic diagram of the structure of the first contact patch group provided in an embodiment of this application.

[0031] Figure 5 This is a schematic diagram of the structure of the second contact patch group provided in an embodiment of this application.

[0032] Figure 6 An exploded view of a portion of the structure of a bridge-type contact provided in an embodiment of this application.

[0033] Explanation of reference numerals in the attached figures:

[0034] 100. First contact piece group; 110. Long contact piece; 111. First end; 112. Second end; 113. First tooling groove;

[0035] 200, Second contact piece group; 210, Short contact piece; 211, Third end; 212, Fourth end; 213, Second tooling slot;

[0036] 300. First elastic element;

[0037] 400. Second elastic element;

[0038] 500, partition;

[0039] 600, bracket;

[0040] 700, Fixed shaft;

[0041] 800, motherboard;

[0042] 900, busbar. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] 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 belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0045] The terms "comprising" and "having," and any variations thereof, used in the specification, claims, and drawings of this application are intended to cover without excluding other meanings. The words "a" or "an" do not exclude the presence of multiples.

[0046] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0047] 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 represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0048] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the stationary contact or specific structure of the circuit breaker of this application. For example, in the description of this application, terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0049] 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.

[0050] In the description of this application, it should be noted that, unless otherwise expressly 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. A physical connection can be a fixed connection, such as a connection secured by fasteners, such as a connection secured by screws, bolts, or other fasteners; 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 according to the specific circumstances.

[0051] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0052] Figure 1 Assembly drawings of busbars, bridge-type contacts, and busbars provided for embodiments of this application. Figure 1 As shown, this application provides a drawer-type circuit breaker, which includes a circuit breaker body and bridge-type contacts. The circuit breaker body is connected to the bridge-type contacts via a busbar 800.

[0053] A drawer-type circuit breaker is a special type of low-voltage circuit breaker. Its design allows the circuit breaker body to move freely inside the drawer socket, much like a drawer. Drawer-type circuit breakers offer advantages such as convenient maintenance, high flexibility, and space saving. They are widely used in factories, commercial buildings, and residential areas as important protection equipment for low-voltage power distribution networks.

[0054] A typical drawer-type circuit breaker includes a drawer base, circuit breaker body, busbar 800, bridge contacts, and busbar 900. The drawer base makes the installation, maintenance, and replacement of the circuit breaker body more convenient. The busbar 900 is mounted on the drawer base; one end of the busbar 900 is connected to the bridge contacts, and the other end is electrically connected to an external conductive component.

[0055] The circuit breaker body is slidably connected within the drawer base, allowing it to be individually removed for inspection, replacement, or maintenance. The circuit breaker body is equipped with a busbar 800. When the circuit breaker body enters the drawer base, the busbar 800 can connect with the bridge contacts; when the circuit breaker body is slid out of the drawer base, the busbar 800 can separate from the bridge contacts.

[0056] The bridge-type contacts in this application have relatively dispersed contact points with the busbar 800. This facilitates heat dissipation at the connection between the busbar 800 and the bridge-type contacts, thereby reducing the temperature rise at the busbar 800. This reduces the likelihood of overheating at the busbar 800, which could damage internal components and extend the service life of the drawer-type circuit breaker.

[0057] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0058] Figure 2 An exploded view of the busbar and bridge-type contacts provided in an embodiment of this application. Figure 3 This is a cross-sectional view of a bridge-type contact provided in an embodiment of this application. Figures 1 to 3As shown, this application provides a bridge-type contact, which includes a first contact piece group 100 and a second contact piece group 200. The first contact piece group 100 includes a first clamping portion. The second contact piece group 200 includes a second clamping portion. Both the first clamping portion and the second clamping portion abut against a busbar 800, and the portions of the first clamping portion abutting against the busbar 800 are offset from the portions of the second clamping portion abutting against the busbar 800.

[0059] The first clamping part and the second clamping part are both disposed facing the busbar 800. The first clamping part includes a first clamping opening. When the bridge-type contact is connected to the busbar 800, the busbar 800 extends into the first clamping opening, the first clamping part abuts against the side wall of the busbar 800, and the first clamping part can clamp the busbar 800 tightly. The second clamping part includes a second clamping opening. When the bridge-type contact is connected to the busbar 800, the busbar 800 extends into the second clamping opening, the second clamping part abuts against the side wall of the busbar 800, and the second clamping part can also clamp the busbar 800 tightly.

[0060] When the first clamping portion is farther from the end of the bridge-type contact used for connecting to the busbar 900 compared to the second clamping portion, when the busbar 800 is connected to the bridge-type contact, the busbar 800 first contacts the first contact piece group 100, and then contacts the second contact piece group 200. When the first clamping portion is closer to the end of the bridge-type contact used for connecting to the busbar 900 compared to the second clamping portion, when the busbar 800 is connected to the bridge-type contact, the busbar 800 first contacts the second contact piece group 200, and then contacts the first contact piece group 100.

[0061] Since the busbar 800 is connected to the bridge contact by being inserted into the first clamping part and the second clamping part, the part where the first clamping part and the busbar 800 abut against each other can be misaligned with the part where the second clamping part and the busbar 800 abut against each other.

[0062] In summary, this application designs the bridge-type contact as a combination of a first contact piece group 100 and a second contact piece group 200, enabling the bridge-type contact to form a first clamping portion and a second clamping portion. When the busbar 800 is connected to the bridge-type contact, the portions of the first clamping portion and the second clamping portion that abut against the busbar 800 are misaligned, thus dispersing the contact portions between the bridge-type contact and the busbar 800.

[0063] Compared to the prior art where the contact points between the bridge-type contacts and the busbar 800 are relatively concentrated, this application disperses the contact points between the bridge-type contacts and the busbar 800, which is more conducive to heat dissipation at the contact points. This reduces the temperature rise at the busbar 800 and decreases the probability of the drawer-type circuit breaker's internal components being affected by excessively high temperatures at the busbar 800, thus affecting the overall service life of the drawer-type circuit breaker.

[0064] Figure 4 This is a schematic diagram of the structure of the first contact patch group provided in an embodiment of this application. Figure 5 This is a schematic diagram of the structure of the second contact patch group provided in an embodiment of this application. Figure 1 as well as Figures 3 to 5 As shown, the first contact piece group 100 includes two long contact pieces 110, and the mutually facing surfaces of the two long contact pieces 110 near the busbar 800 constitute a first clamping portion. The second contact piece group 200 includes two short contact pieces 210, and the mutually facing surfaces of the two short contact pieces 210 near the busbar 800 constitute a second clamping portion. During the insertion of the bridge-type contact into the busbar 800, the first clamping portion connects to the busbar 800 before the second clamping portion.

[0065] Two long contact pieces 110 can be arranged in parallel and can be mirror-symmetrical. Each long contact piece 110 may include a first end 111 and a second end 112, with the second end 112 closer to the busbar than the first end 111. When there is a gap between the two long contact pieces 110, mutually facing surfaces are formed between them. The mutually facing surfaces at the second ends 112 of the two long contact pieces 110 can form a first clamping portion for the first contact piece group 100, and the gap between the two long contact pieces 110 can serve as a first clamping opening. When the busbar 800 needs to be fixed to the bridge-type contact, it can be inserted between the two long contact pieces 110.

[0066] Two short contact pieces 210 can be arranged in parallel and can be mirror-symmetrical. Each short contact piece 210 may include a third end 211 and a fourth end 212, with the fourth end 212 closer to the busbar than the third end 211. When there is a gap between the two short contact pieces 210, mutually facing surfaces are formed between them. The mutually facing surfaces of the fourth ends 212 of the two short contact pieces 210 can form a second clamping portion for the first contact piece group 100, and the gap between the two short contact pieces 210 can serve as a second clamping opening. When the busbar 800 needs to be fixed to the bridge-type contact, it can be inserted between the two short contact pieces 210.

[0067] The length of the long contact piece 110 is longer than the length of the short contact piece 210. When the first contact piece group 100 and the second contact piece group 200 are assembled into a bridge-type contact, the first end 111 of the long contact piece 110 is flush with the third end 211 of the short contact piece 210, and the second end 112 of the long contact piece 110 protrudes beyond the fourth end 212 of the short contact piece 210. The first clamping part is the second end 112 of the long contact piece 110, and the second clamping part is the fourth end 210 of the short contact piece 210. When the busbar 800 is connected to the bridge-type contact, the busbar 800 first contacts the second end 112 of the long contact piece 110, and then contacts the fourth end 212 of the short contact piece 210.

[0068] In summary, the first contact piece group 100 includes two long contact pieces 110, with the surfaces of the two long contact pieces 110 facing each other forming a first clamping portion. This allows the busbar 800 to be clamped using the two long contact pieces 110, enabling the busbar 800 to connect with the bridge-type contacts. The second contact piece group 200 includes two short contact pieces 210, with the surfaces of the two short contact pieces 210 facing each other forming a second clamping portion. This allows the busbar 800 to be clamped using the two short contact pieces 210, enabling the busbar 800 to connect with the bridge-type contacts.

[0069] By setting the first contact piece group 100 to a combination of two long contact pieces 110 and setting the second contact piece group 200 to a combination of two short contact pieces 210, the first clamping part can abut against the busbar 800 before the second clamping part during the insertion of the bridge-type contact into the busbar 800, thereby creating a misalignment between the abutment point of the first clamping part and the busbar 800 and the abutment point of the second clamping part and the busbar 800.

[0070] like Figures 1 to 3 As shown, the first clamping part is in contact with the surface of the busbar 800, and / or the second clamping part is in contact with the surface of the busbar 800.

[0071] The surfaces of the two long contact pieces 110 facing each other can be planes. Correspondingly, the surface of the busbar 800 contacting the first clamping part can also be a plane, so that when the busbar 800 contacts the first clamping part, it can be a surface contact. Alternatively, the surfaces of the two long contact pieces 110 facing each other can be curved surfaces. Correspondingly, the surface of the busbar 800 contacting the first clamping part can also be a curved surface, so that when the busbar 800 contacts the first clamping part, it can also be a surface contact.

[0072] The surfaces of the two short contact pieces 210 facing each other can be planes. Correspondingly, the surface of the busbar 800 contacting the second clamping part can also be a plane, so that when the busbar 800 contacts the second clamping part, it can be a surface contact. Alternatively, the surfaces of the two short contact pieces 210 facing each other can be curved surfaces. Correspondingly, the surface of the busbar 800 contacting the second clamping part can also be a curved surface, so that when the busbar 800 contacts the second clamping part, it can also be a surface contact.

[0073] In summary, since the first clamping part is in contact with the busbar 800, the current flow area can be increased when current flows through the part where the busbar 800 and the first clamping part abut. This increased current flow area reduces the temperature rise at the contact point between the busbar 800 and the first clamping part.

[0074] The second clamping part contacts the surface of the busbar 800. When current flows through the part where the busbar 800 and the second clamping part abut, the current flow area can also be increased. After the current flow area is increased, the temperature rise at the abutment point between the busbar 800 and the second clamping part can be reduced.

[0075] When the temperature rise at the contact point between the busbar 800 and the first clamping part decreases, and / or when the temperature rise at the contact point between the busbar 800 and the second clamping part decreases, the probability of the drawer-type circuit breaker's internal components being affected by excessively high temperatures at the busbar 800, thereby affecting the overall service life of the drawer-type circuit breaker, can be reduced.

[0076] The arrangement of the first contact group 100 and the second contact group 200 can be varied, as described below. Figures 2 to 5 The two arrangements are described in detail, but this does not constitute a limitation on the technical solution of this application.

[0077] The first arrangement is as follows: Figure 1 as well as Figure 2 As shown, there are multiple first contact groups 100 and multiple second contact groups 200. The multiple first contact groups 100 and multiple second contact groups 200 are arranged alternately.

[0078] The bridge-type contact can be composed of multiple sets of first contact piece groups 100 and multiple sets of second contact piece groups 200. The bridge-type contact includes two supports 600, which are arranged in parallel with a gap between them. The two supports 600 are fixedly connected by a fixed shaft 700. During assembly, one support 600 is first fixedly connected to one end of the fixed shaft 700. Then, the first contact piece groups 100 and second contact piece groups 200 are alternately arranged and fitted onto the fixed shaft 700. Finally, the other support 600 is fixedly connected to the other end of the fixed shaft 700.

[0079] In the first arrangement, the first contact group 100 may contact one second contact group 200, or the first contact group 100 may contact two second contact groups 200.

[0080] When the first arrangement is selected, since the parts of the first clamping part that abut against the busbar 800 and the parts of the second clamping part that abut against the busbar 800 are misaligned, when multiple sets of first contact piece groups 100 and multiple sets of second contact piece groups 200 are arranged alternately, the abutments of the multiple sets of first clamping parts and the busbar 800 are closer together, and the abutments of the multiple sets of second clamping parts and the busbar 800 are closer together. This makes the force on the busbar 800 more stable, and makes the resistance more uniform when the busbar 800 enters the bridge-shaped contact, thus improving the reliability of the drawer-type circuit breaker.

[0081] Figure 6 An exploded view of a portion of the structure of a bridge-type contact provided in an embodiment of this application. (See attached image.) Figure 6 As shown, when the first arrangement is selected, a spacer 500 is provided between adjacent first contact piece group 100 and second contact piece group 200.

[0082] The spacer 500 can be sleeved on the fixed shaft 700 and can be fixedly connected to the fixed shaft 700. The spacer 500 can be plate-shaped, and the spacer 500 will not protrude beyond the first contact piece group 100 in the installation direction of the busbar 800, nor will the spacer 500 protrude beyond the second contact piece group 200 in the installation direction of the busbar 800, so as to avoid the spacer 500 affecting the connection between the busbar 800 and the bridge-type contact.

[0083] In summary, when the busbar 800 is connected to the bridge-type contacts, the contact points of the first contact piece group 100 and the second contact piece group 200 with the busbar 800 are misaligned. By setting a spacer 500 between the first contact piece group 100 and the second contact piece group 200, the probability of mutual interference between adjacent first contact piece groups 100 and second contact piece groups 200 can be reduced, the probability of unstable connection between the busbar 800 and the bridge-type contacts can be reduced, and the reliability of the drawer-type circuit breaker can be improved.

[0084] In the second arrangement, the number of first contact groups 100 and second contact groups 200 is greater than or equal to two. At least two first contact groups 100 are in contact with each other to form a first combination. At least two second contact groups 200 are in contact with each other to form a second combination. A second combination may be provided between two adjacent first combinations, or a first combination may be provided between two adjacent second combinations. The following description assumes that both the number of first contact groups 100 and second contact groups 200 is two.

[0085] In the second arrangement, two first contact groups 100 can contact each other to form a first combination, and two second contact groups 200 can contact each other to form a second combination. Each first combination has a gap between it, and the second combination is located within that gap. Alternatively, each second combination has a gap between it, and the first combination is located within that gap.

[0086] When the second arrangement is selected, the clamping force of the first combination on the busbar 800 is stronger because the first combination can be composed of multiple first contact piece groups 100. Similarly, the clamping force of the second combination on the busbar 800 is stronger because the second combination can be composed of multiple second contact piece groups 200. This makes the connection between the busbar 800 and the bridge contact more stable, reduces the probability of the bridge contact falling off the busbar 800, and improves the reliability of the drawer-type circuit breaker.

[0087] Please continue to refer to Figure 6 As shown, when the second arrangement is selected, a partition 500 is provided between adjacent first and second combinations.

[0088] The spacer 500 can be sleeved on the fixed shaft 700 and can be fixedly connected to the fixed shaft 700. The spacer 500 can be plate-shaped, and the spacer 500 will not protrude beyond the first contact piece group 100 in the installation direction of the busbar 800, nor will the spacer 500 protrude beyond the second contact piece group 200 in the installation direction of the busbar 800, so as to avoid the spacer 500 affecting the connection between the busbar 800 and the bridge-type contact.

[0089] In summary, when the busbar 800 is connected to the bridge-type contacts, the contact points of the first contact piece group 100 and the second contact piece group 200 with the busbar 800 are misaligned. A spacer 500 is provided between adjacent first and second combinations, which can reduce the probability of mutual interference between adjacent first and second combinations, reduce the probability of unstable connection between the busbar 800 and the bridge-type contacts, and improve the reliability of the drawer-type circuit breaker.

[0090] like Figure 1 , Figure 3 as well as Figure 6 As shown, the middle portions of the two long contact pieces 110 are connected by a first elastic element 300, and the middle portions of the two short contact pieces 210 are connected by a second elastic element 400.

[0091] Both long contact pieces 110 have through holes in their middle portions along their arrangement direction, and these through holes are positioned opposite each other. The first elastic element 300 can be a tension spring. One end of the tension spring passes through the through hole in one of the long contact pieces 110 and is fixedly connected to it. The other end of the tension spring passes through the through hole in the other long contact piece 110 and is fixedly connected to it. In this way, the first elastic element 300 can pull the two long contact pieces 110 closer together, thus allowing the first clamping part to clamp the busbar 800.

[0092] Both short contact pieces 210 have through holes in their middle portions along their arrangement direction, and these through holes are positioned opposite each other. The second elastic element 400 can be a tension spring. One end of the tension spring passes through the through hole in one of the short contact pieces 210 and is fixedly connected to it. The other end of the tension spring passes through the through hole in the other short contact piece 210 and is fixedly connected to it. In this way, the second elastic element 400 can pull the two short contact pieces 210 closer together, thus clamping the busbar 800 with the second clamping part.

[0093] In summary, by connecting the two long contact pieces 110 using the first elastic element 300, the elastic force of the first elastic element 300 can bring the two long contact pieces 110 closer together, thereby forming a first clamping part to clamp the busbar 800. Connecting the first elastic element 300 to the middle of the two long contact pieces 110 ensures that the clamping force at both ends of the two long contact pieces 110 is the same, so that the first ends 111 of the two long contact pieces 110 can clamp the busbar 900 of the drawer-type circuit breaker.

[0094] The two short contact pieces 210 are connected by a second elastic element 400. The elastic force of the second elastic element 400 causes the two short contact pieces 210 to move closer together, thereby forming a second clamping part to clamp the busbar 800. The second elastic element 400 is connected to the middle of the two short contact pieces 210 so that the clamping force at both ends of the two short contact pieces 210 is the same, so that the third end 211 of the two short contact pieces 210 can clamp the busbar 900 of the drawer-type circuit breaker.

[0095] Please continue to refer to Figure 1 and Figure 6 As shown, the two long contact pieces 110 have a first tooling groove 113 on the side facing away from the busbar 800, and the two short contact pieces 210 have a second tooling groove 213 on the side facing away from the busbar 800. The first tooling groove 113 and the second tooling groove 213 are connected.

[0096] The first tooling groove 113 can be a through groove opened on the two long contact pieces 110 along the arrangement direction of the first contact piece group 100 and the second contact piece group 200. The first tooling groove 113 can be set on the side wall of the two long contact pieces 110 facing away from each other. The first tooling groove 113 can be set at the second end 112 of the two long contact pieces 110.

[0097] The second tooling groove 213 can be a through groove formed on the two short contact pieces 210 along the arrangement direction of the first contact piece group 100 and the second contact piece group 200. The second tooling groove 213 can be provided on the side wall of the two short contact pieces 210 facing away from each other. The second tooling groove 213 can be provided at the fourth end 212 of the two short contact pieces 210.

[0098] The first tooling slot 113 and the second tooling slot 213 can be the same size and shape, and the first tooling slot 113 and the second tooling slot 213 are connected.

[0099] In summary, the two long contact pieces 110 are connected by the first elastic element 300. When the end of the bridge-type contact away from the busbar 800 is connected to the busbar 900, the second ends 112 of the two long contact pieces 110 need to be brought together so that the first ends 111 of the two long contact pieces 110 are opened. At this time, the setting of the first tooling groove 113 can enable the operator to exert force more effectively.

[0100] The two short contact pieces 210 are connected by a second elastic element 400. When the end of the bridge contact away from the busbar 800 is connected to the busbar 900, the fourth ends 212 of the two short contact pieces 210 need to be brought together so that the third ends 211 of the two short contact pieces 210 are opened. At this time, the setting of the second tooling groove 213 can enable the operator to exert force more effectively.

[0101] Since the second end 112 of the long contact piece 110 protrudes beyond the fourth end 212 of the short contact piece 210, when the first tooling groove 113 communicates with the second tooling groove 213, it is more convenient for the operator to exert force.

Claims

1. A bridge-type contact, applied to a drawer-type circuit breaker, the drawer-type circuit breaker including a busbar, characterized in that, The bridge-type contact includes: The first contact piece group includes a first clamping part; The second contact piece group includes a second clamping part; Both the first clamping part and the second clamping part abut against the busbar, and the parts of the first clamping part abutting against the busbar and the parts of the second clamping part abutting against the busbar are misaligned.

2. A bridge-type contact according to claim 1, characterized in that, The first contact piece group includes two long contact pieces, and the surfaces of the two long contact pieces facing each other at the end near the busbar are the first clamping portion. The second contact piece group includes two short contact pieces, and the surfaces of the two short contact pieces facing each other at the end near the busbar are the second clamping portion. During the process of inserting the bridge-type contact into the busbar, the first clamping part contacts the busbar before the second clamping part.

3. A bridge-type contact according to claim 2, characterized in that, The number of the first contact group and the second contact group is multiple; Multiple first contact groups and multiple second contact groups are arranged alternately.

4. A bridge-type contact according to claim 2, characterized in that, The number of the first contact group and the second contact group is greater than or equal to 2; At least two of the first contact pieces are in contact with each other to form a first combination; At least two of the second contact pieces come into contact with each other to form a second combination; A second combination may be provided between two adjacent first combinations, or a first combination may be provided between two adjacent second combinations.

5. A bridge-type contact according to claim 2, characterized in that, The first clamping part contacts the female busbar surface, and / or the second clamping part contacts the female busbar surface.

6. A bridge-type contact according to claim 2, characterized in that, The middle portions of the two long contact pieces are connected by a first elastic element, and the middle portions of the two short contact pieces are connected by a second elastic element.

7. A bridge-type contact according to claim 3, characterized in that, It also includes spacers; The spacer is provided between adjacent first contact piece groups and second contact piece groups.

8. A bridge-type contact according to claim 4, characterized in that, It also includes spacers; The spacer is provided between adjacent first and second combinations.

9. A bridge-type contact according to claim 8, characterized in that, The two long contact pieces are provided with a first tooling groove on the side facing away from the busbar, and the two short contact pieces are provided with a second tooling groove on the side facing away from the busbar. The first tooling slot is connected to the second tooling slot.

10. A drawer-type circuit breaker, characterized in that, Includes the circuit breaker body and the bridge-type contacts as described in any one of claims 1 to 9; The circuit breaker body is connected to the bridge-type contacts via a busbar.

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