Conductive assembly and draw-out circuit breaker

Abstract

The application discloses a conductive assembly and a drawer type circuit breaker, and relates to the technical field of low-voltage electrical appliances, which comprises a busbar, a clamping piece, a conductive row and a body row. The clamping piece comprises a first bottom plate, a first side plate and a second side plate, the first side plate and the second side plate and the first bottom plate form a first clamping cavity, and the first bottom plate is fixedly connected to the busbar. The conductive row comprises a second bottom plate, a third side plate and a fourth side plate, the third side plate and the fourth side plate and the second bottom plate form a second clamping cavity, the conductive row is installed in the first clamping cavity, the opening of the second clamping cavity and the opening of the first clamping cavity are in the same direction, and the second bottom plate is fixedly connected to the first bottom plate. The body row can be plugged into the second clamping cavity, and when the body row is inserted into the second clamping cavity, the body row is in contact with the third side plate and the fourth side plate on both sides. The conductive assembly and the drawer type circuit breaker provided by the application can reduce the contact resistance in the conductive loop, so that the reliability and stability of the circuit breaker are improved.

Description

Technical Field

[0001] This application relates to the field of low-voltage electrical technology, specifically to a conductive component and a drawer-type circuit breaker. Background Technology

[0002] With the development of new energy technologies, more stringent requirements have been placed on the stability and heat resistance of supporting low-voltage circuit breakers. Their temperature rise index needs to be further reduced by 10-20K compared with the qualified standard specified in the national standard GB / T14048.1. To achieve this target, the key lies in optimizing the conductive circuit design of the circuit breaker and reducing Joule heat loss during power transmission by reducing contact resistance.

[0003] In existing drawer-type circuit breakers, the conductive connection between the main body and the busbar generally adopts a bridge-type contact or bundle-shaped clamp structure with two-phase ends clamped. This type of structure has many dynamic contact points in its conductive circuit. These contact points are prone to large contact resistance due to problems such as loose fit and oxidation, leading to excessively high temperature rise during operation and making it difficult to meet the low temperature rise requirements of the new energy field.

[0004] Therefore, it is urgent to optimize the conductive components of drawer-type circuit breakers to solve the problems of existing technologies. Utility Model Content

[0005] The purpose of this application is to provide a conductive component and a drawer-type circuit breaker that can reduce the contact resistance in the conductive circuit, thereby improving the reliability and stability of the circuit breaker.

[0006] In a first aspect, embodiments of this application provide a conductive component, including a busbar, a clamping member, a conductive bar, and a body bar. The clamping member includes a first base plate, a first side plate, and a second side plate. The first side plate and the second side plate are disposed opposite to each other on the two sides of the first base plate and enclose a first clamping cavity. The first base plate is fixedly connected to the busbar.

[0007] The conductive busbar includes a second base plate, a third side plate, and a fourth side plate. The third and fourth side plates are disposed opposite each other on the two sides of the second base plate and enclose a second clamping cavity. The conductive busbar is installed in the first clamping cavity, and the opening of the second clamping cavity faces the same direction as the opening of the first clamping cavity. The second base plate is fixedly connected to the first base plate. The main body busbar can be inserted and removed from the second clamping cavity, and when the main body busbar is inserted into the second clamping cavity, its two sides respectively contact the third and fourth side plates for electrical conduction.

[0008] This embodiment effectively improves the assembly stability and electrical connection stability between the busbar, clamping component, and conductive busbar by fixing the clamping component to the busbar and nesting the conductive busbar to the clamping component. This avoids the problem of increased contact resistance caused by poor contact at multiple dynamic contact points in traditional designs. Simultaneously, the second clamping cavity formed on the conductive busbar directly engages with the main busbar in a plug-in manner. Compared to the traditional two-phase two-end clamping structure, this single-phase clamping design significantly reduces the number of dynamic contact points, effectively lowering the risk of increased contact resistance due to poor contact in the conductive components.

[0009] In some examples, the first and second side plates both form a first acute angle with the first base plate, and the third and fourth side plates both form a second acute angle with the second base plate.

[0010] The above scheme allows the clamping component to form the first clamping cavity while providing elastic deformation space for the first and second side plates. The same applies to the third and fourth side plates. In this way, when the main body is inserted into the second clamping cavity, the conductive busbar can be tightly connected to the main body without the need for other auxiliary fixing structures. It features a simple structure and stable assembly, which helps to reduce the temperature rise of the conductive components.

[0011] In some examples, the third side plate includes a plurality of first contact pieces spaced apart, and the fourth side plate includes a plurality of second contact pieces spaced apart. The plurality of first contact pieces and the plurality of second contact pieces are arranged in a one-to-one correspondence, and there is a preset distance between the clamping end of the first contact piece and the clamping end of the second contact piece. The preset distance is less than the thickness of the body row.

[0012] Multiple independent contact pieces can adapt to the positional displacement of the main body row or minor unevenness on the surface of the main body row through their respective elastic deformation. When the main body row shifts positionally or has slight protrusions or depressions on its surface during insertion and removal, individual contact pieces can adjust their deformation to fit the main body row, avoiding incomplete contact caused by localized misfitting. Furthermore, even if a few contact pieces fail due to wear or oxidation, the remaining contact pieces can still function normally, ensuring the continuity of the conductive path and improving the reliability of the component.

[0013] In some examples, the first side plate includes a plurality of first pressure plates spaced apart, each of the plurality of first pressure plates corresponding to a plurality of first contact plates, and the first pressure plates abutting against the side of the first contact plates away from the second contact plates.

[0014] By setting a first pressure plate on the first side plate that abuts against the first contact piece one by one, not only can the rigidity of the first contact piece be enhanced and the contact pressure compensated to ensure stable contact between the main body and the first contact piece, but the current conduction path can also be optimized and the vibration resistance performance improved. In synergy with the multiple first contact pieces of the conductive busbar, the problems of unreliable contact and large resistance loss can be effectively solved.

[0015] In some examples, the second side plate includes a plurality of second pressure plates spaced apart, each of which corresponds to a plurality of second contact plates, and the second pressure plates abut against the side of the second contact plates away from the first contact plates.

[0016] The symmetrical contact between the second and first pressure plates ensures that the main body is subjected to equal and opposite clamping forces on both sides, forming a bidirectional clamping effect. This balanced force ensures that the main body is centered within the second clamping cavity, preventing poor contact on one side due to skewing. It also keeps the pressure at each contact point consistent, which helps improve the electrical connection stability of the conductive components.

[0017] In some examples, the first contact piece has a first bend that bends away from the second contact piece; the second contact piece has a second bend that bends away from the first contact piece.

[0018] The first and second bends can form a guide structure between the first and second side plates, facilitating the insertion of the main body into the second clamping cavity. On the other hand, they can reduce the contact area between the clamping member and the main body while maintaining stable contact, thereby reducing contact resistance.

[0019] In some examples, the preset distance between at least one first contact piece located at the two edges of the third side plate and the corresponding second contact piece is smaller than the preset distance between the remaining first contact pieces and the corresponding second contact pieces.

[0020] By reducing the preset distance between the first and second contact pieces, which are positioned opposite each other on both sides of the clamping element, the body assembly can obtain a greater initial clamping force at that location. A smaller distance means a more significant interference fit, resulting in greater elastic deformation of the first and second contact pieces and a stronger clamping reaction force. This effectively counteracts the electrodynamic repulsion during a short circuit, preventing the first contact piece from separating from the body assembly and the second contact piece from the body assembly at that location, thus ensuring continuous and reliable contact.

[0021] In some examples, the third side plate also includes a plurality of third contact pieces, which are spaced apart on both sides of the third side plate, and the width of the third contact pieces is greater than the width of the first contact pieces. The fourth side plate also includes a plurality of fourth contact pieces, which are spaced apart on both sides of the second side plate, and the width of the fourth contact pieces is greater than the width of the second contact pieces, and the plurality of fourth contact pieces are configured in a one-to-one correspondence with the plurality of third contact pieces.

[0022] By setting a wider third contact piece and a fourth contact piece at the two edges of the first side plate, the clamping force is enhanced by increasing the structural size, thereby overcoming the greater electric repulsive force on the two edges of the clamping member, so that the body row can be stably clamped on the clamping member.

[0023] In some examples, the busbar, the first base plate, and the second base plate are all provided with fixing holes and are interconnected. The fixing holes are provided with connectors to fix the busbar, the clamping member, and the conductive bar.

[0024] The integrated connection of the busbar, clamping component, and conductive busbar through fixing holes and connectors solves the problems of multiple dynamic contact points and unreliable connection in traditional structures. It effectively improves the electrical connection stability between the clamping component and the busbar, and between the conductive busbar and the busbar, thereby reducing the risk of increased contact resistance and keeping the temperature rise of the conductive components stable.

[0025] Secondly, embodiments of this application also provide a drawer-type circuit breaker, including the aforementioned conductive components.

[0026] The drawer-type circuit breaker provided in the second aspect and various possible designs of the second aspect, with the clamping connection between the clamping member and the main body, has the same beneficial effects as the first aspect and various possible embodiments of the first aspect, and will not be repeated here. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the overall structure of the conductive component provided in the embodiments of this application.

[0029] Figure 2 An exploded view of the conductive component provided in an embodiment of this application.

[0030] Figure 3 This is a schematic diagram of the assembly state of the busbar, clamping member and conductive busbar provided in the embodiments of this application.

[0031] Figure 4 An exploded view of the clamping member and conductive bus provided in the embodiments of this application.

[0032] Figure 5 This is a schematic diagram of the structure of the clamping member provided in the embodiment of this application.

[0033] Figure 6Another embodiment of the clamping member provided in this application.

[0034] Explanation of reference numerals in the attached drawings: 100, conductive component; 1, busbar; 2, clamping component; 21, first base plate; 22, first side plate; 221, first pressure plate; 222, third pressure plate; 23, second side plate; 231, second pressure plate; 232, fourth pressure plate; 3, conductive busbar; 31, second base plate; 32, third side plate; 321, first contact piece; 3211, first bend; 33, fourth side plate; 331, second contact piece; 3311, second bend; 4, main body busbar; 5, connector. Detailed Implementation

[0035] 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, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0038] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for 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. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0040] The conductive components of a drawer-type circuit breaker typically include a busbar, a body bar, and electrical connectors for electrically connecting the two. Traditional electrical connectors usually employ a bridge-type contact or a bundle-shaped clamp structure that clamps the two ends of the two phases. The busbar and the body bar are connected by clamping and contacting the two ends of such structures to achieve electrical connection between them.

[0041] However, this type of structure has many dynamic contact points at the contact connection between the busbar and the main body. These dynamic contact points are prone to loosening after vibration or oxidation, resulting in high contact resistance, causing the conductive components to overheat and affecting the safe use of the drawer-type circuit breaker.

[0042] Based on this, embodiments of this application provide a conductive component and a drawer-type circuit breaker, which can reduce the contact resistance in the conductive circuit to improve the reliability and stability of the circuit breaker.

[0043] 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.

[0044] Please refer to Figures 1 to 3 This embodiment provides a conductive component 100, including a busbar 1, a clamping member 2, a conductive busbar 3, and a main body busbar 4. The clamping member 2 includes a first base plate 21, a first side plate 22, and a second side plate 23. The first side plate 22 and the second side plate 23 are disposed opposite to each other on the two sides of the first base plate 21 and enclose to form a first clamping cavity. The first base plate 21 is fixedly connected to the busbar 1.

[0045] The conductive busbar 3 includes a second base plate 31, a third side plate 32, and a fourth side plate 33. The third side plate 32 and the fourth side plate 33 are disposed opposite to each other on the two sides of the second base plate 31 and enclose a second clamping cavity. The conductive busbar 3 is installed in the first clamping cavity, and the opening of the second clamping cavity faces the same direction as the opening of the first clamping cavity. The second base plate 31 is fixedly connected to the first base plate 21. The main body busbar 4 can be inserted and removed from the second clamping cavity, and when the main body busbar 4 is inserted into the second clamping cavity, its two sides respectively contact the third side plate 32 and the fourth side plate 33 for electrical conduction.

[0046] Busbar 1 serves as the core current input or output carrier of the conductive component 100, enabling electrical connection between the conductive component 100 and the external or internal circuit of the drawer-type circuit breaker. Clamping member 2 serves as the connection transition and fixing carrier between busbar 1 and conductive busbar 3, enabling stable assembly and conductive connection between the two, while also providing structural support for conductive busbar 3.

[0047] The conductive busbar 3 serves as a conductive transfer and clamping carrier between the clamping member 2 and the main body busbar 4. It is used to transfer the current conducted by the clamping member 2 to the main body busbar 4, or conversely, to transfer the current input to the main body busbar 4 to the clamping member 2 and the busbar 1. The main body busbar 4 serves as a movable conductive component of the conductive assembly 100. It is used to realize the electrical connection between the conductive assembly 100 and the internal circuit of the drawer-type circuit breaker, and undertakes the function of current switching or transfer according to the working state of the circuit breaker (opening, closing).

[0048] Specifically, refer to Figures 2 to 4 The first base plate 21 is a flat plate structure, serving as the bearing base for the clamping member 2. Its dimensions are adapted to the connection area of ​​the busbar 1 and the second base plate 31 of the conductive busbar 3. The first side plate 22 and the second side plate 23 are symmetrically arranged plate structures, which are vertically or obliquely connected to the long edges of the two sides of the first base plate 21, forming a first clamping cavity with a one-way opening together with the first base plate 21.

[0049] The side of the first base plate 21 furthest from the opening of the first clamping cavity (i.e., the outer surface of the first base plate 21) is fixedly connected to the busbar 1. The specific connection method can be selected according to the actual application scenario, such as bolt fastening, welding, or riveting. The above-mentioned fixed connection method can avoid the drawbacks of dynamic contact between the clamping part 2 and the busbar 1, forming a stable conductive path, thereby reducing the contact resistance in the structure.

[0050] Furthermore, the clamping component 2 is integrally molded, and the integrated structural design avoids the problem of increased contact resistance caused by assembly gaps in traditional split structures, simplifying the production process and reducing manufacturing costs. At the same time, the clamping component 2 is generally made of a metal material with conductive properties and a certain mechanical strength (such as copper alloy, copper-silver composite material, etc.), which can optimize conductive contact performance to meet the requirements of low temperature rise and high reliability.

[0051] Additionally, refer to Figures 2 to 4The conductive busbar 3 has a similar structure to the clamping member 2. The second base plate 31 is also a flat plate structure. The third side plate 32 and the fourth side plate 33 are symmetrically arranged on both long edges of the second base plate 31, forming a second clamping cavity together with the second base plate 31. The difference between the conductive busbar 3 and the clamping member 2 is that the overall size of the conductive busbar 3 is smaller than that of the clamping member 2, and the inner cavity size of the first clamping cavity matches the overall size of the conductive busbar 3, so as to realize the nested assembly of the conductive busbar 3 in the first clamping cavity.

[0052] The conductive busbar 3 is installed in the first clamping cavity, and the opening of the second clamping cavity is in the same direction as the opening of the first clamping cavity (both facing the insertion and removal direction of the main body busbar 4), ensuring that the main body busbar 4 can be smoothly inserted into the second clamping cavity of the conductive busbar 3.

[0053] Furthermore, the conductive busbar 3 is fixedly connected to the first base plate 21 within the first clamping cavity via the second base plate 31. The specific fixing connection method can be bolt fastening, welding, etc. The above-mentioned fixing connection method can avoid the situation where the conductive busbar 3 and the clamping member 2 are not tightly connected, so as to form a stable conductive path and thereby reduce the contact resistance in the structure.

[0054] The conductive busbar 3 is also integrally molded, which avoids the problem of increased contact resistance caused by assembly gaps in split structures, simplifies the production process, and reduces manufacturing costs. At the same time, the conductive busbar 3 is also made of a metal material with conductive properties and a certain mechanical strength (such as copper alloy, copper-silver composite material, etc.), which can optimize conductive contact performance to meet the requirements of low temperature rise and high reliability.

[0055] During use, the main body of the conductive component 100 can be inserted into and removed from the second clamping cavity along the opening direction of the second clamping cavity. When the circuit breaker is in the closed state, the main body of the component 4 is inserted into the second clamping cavity, forming a conductive path through close contact with the third side plate 32 and the fourth side plate 33, transmitting current through the conductive busbar 3 and the clamping member 2 to the busbar 1, or vice versa, to other components inside the circuit breaker. When the circuit breaker is in the open state, the main body of the component 4 is pulled out of the second clamping cavity, cutting off the conductive path.

[0056] By adopting a dynamic engagement consisting of unidirectional insertion and removal of the main body 4, the contact instability problem caused by the relative movement of multiple components in the traditional structure is avoided. At the same time, the two sides of the main body 4 are in close contact with the third side plate 32 and the fourth side plate 33 of the conductive busbar 3, respectively. Compared with the multi-contact point dispersed contact mode in the traditional two-phase two-end clamping structure, this embodiment significantly reduces the number of dynamic contact points, further improving the long-term stability and low-temperature rise performance of the conductive component 100.

[0057] This embodiment effectively improves the assembly stability and electrical connection stability between the busbar 1, the clamping member 2, and the busbar 3 through the fixed connection between the clamping member 2 and the busbar 1, and the nested fixed assembly between the busbar 3 and the clamping member 2. This avoids the problem of increased contact resistance caused by poor contact at multiple dynamic contact points in traditional systems. Simultaneously, the second clamping cavity formed on the busbar 3 directly engages with the main body busbar 4 in a plug-in manner. Compared to the traditional two-phase two-end clamping structure, this single-phase clamping design significantly reduces the number of dynamic contact points, effectively lowering the risk of increased contact resistance in the conductive component 100 due to poor contact.

[0058] Reference Figures 2 to 4 In some examples, the first side plate 22 and the second side plate 23 both form a first acute angle with the first base plate 21, and the third side plate 32 and the fourth side plate 33 both form a second acute angle with the second base plate 31.

[0059] The above scheme can form a first clamping cavity by enclosing the clamping member 2, while the first side plate 22 and the second side plate 23 have elastic deformation space. The same applies to the third side plate 32 and the fourth side plate 33. In this way, when the main body row 4 is inserted into the second clamping cavity, the conductive row 3 and the main body row 4 can be tightly connected without the need for other auxiliary fixing structures. It has the characteristics of simple structure and stable assembly, which is conducive to reducing the temperature rise of the conductive component 100.

[0060] Specifically, refer to Figures 2 to 4 The first side plate 22 and the second side plate 23 of the clamping member 2 are both inclined in the direction toward the inside of the first clamping cavity, that is, the two side plates are in an inwardly converging posture. The first side plate 22 and the second side plate 23 after being inclined maintain a first acute angle with the first bottom plate 21, so as to jointly enclose and form a first clamping cavity with a trapezoidal cross section (the width of the opening end is greater than the width of the bottom).

[0061] The third side plate 32 and the fourth side plate 33 of the conductive busbar 3 are inclined in the direction toward the inside of the second clamping cavity. The inclined third side plate 32 and the fourth side plate 33 maintain the second acute angle with the second bottom plate 31 to enclose and form the second clamping cavity with a trapezoidal cross section. The inclination direction and structural shape of the third side plate 32 and the fourth side plate 33 are consistent with the first side plate 22 and the second side plate 23 of the clamping member 2, forming a nested structure to ensure the coordination of the overall structure.

[0062] The trapezoidal first clamping cavity of the clamping member 2 and the outer shape of the conductive busbar 3 form an interference fit tendency. When the conductive busbar 3 is inserted into the first clamping cavity, the inclined first side plate 22 and second side plate 23 will generate a lateral pre-tightening force on the conductive busbar 3. Combined with the fixed connection between the second base plate 31 and the first base plate 21, the conductive busbar 3 and the clamping member 2 fit together without gap, reducing the risk of increased contact resistance due to assembly loosening.

[0063] After the main body 4 is inserted, the trapezoidal second clamping cavity of the conductive busbar 3 has the inclined third side plate 32 and fourth side plate 33 tightly attached to the two sides of the main body 4 under the action of elastic deformation. The presence of clamping force can effectively break the oxide film on the surface of the main body 4 and reduce the risk of poor contact caused by oxidation of the surface of the main body 4.

[0064] Furthermore, the angle value of the first acute angle is 30°-60°, and the angle value of the second acute angle is the same as that of the first acute angle.

[0065] The first acute angle can be in the range of 30°-60°, preferably 45°, which avoids the first side plate 22 and the second side plate 23 being too tilted due to the angle being too small, causing interference with the conductive busbar 3 during assembly, and also prevents the clamping force from being too large due to the angle being too large.

[0066] The angle of the second acute angle, combined with the thickness design of the insertion end of the main body row 4, is the same as that of the first acute angle, so that the opening width of the second clamping cavity is slightly larger than the thickness of the main body row 4, which facilitates the smooth insertion of the main body row 4. At the same time, the inclined side plate will guide the main body row 4 during the insertion process, guiding the main body row 4 to be accurately inserted into the second clamping cavity and avoiding jamming during insertion and removal.

[0067] Reference Figures 2 to 4 In some examples, the third side plate 32 includes a plurality of first contact pieces 321 spaced apart, and the fourth side plate 33 includes a plurality of second contact pieces 331 spaced apart. The plurality of first contact pieces 321 and the plurality of second contact pieces 331 are arranged in a one-to-one correspondence, and there is a preset distance between the clamping end of the first contact piece 321 and the clamping end of the second contact piece 331. The preset distance is less than the thickness of the body row 4.

[0068] Multiple independent contact pieces can adapt to the positional displacement of the main body row 4 or minor unevenness on the surface of the main body row 4 through their respective elastic deformation. When the main body row 4 is displaced during insertion or removal, or when there are slight protrusions or depressions on its surface, individual contact pieces can adjust their own deformation to fit against the main body row 4, avoiding incomplete contact caused by local non-fitting. At the same time, even if a few contact pieces fail due to wear or oxidation, the remaining contact pieces can still work normally, ensuring the continuity of the conductive path and improving the reliability of the conductive components.

[0069] Specifically, multiple first contact pieces 321 and the third side plate 32 are integrally formed and lie in the same plane. Multiple second contact pieces 331 and the fourth side plate 33 are also integrally formed and lie in the same plane. This integrated design not only eliminates the assembly process between the contact pieces and the side plate, reducing the risk of poor contact due to assembly errors, but also ensures the conductive continuity between the contact pieces and the side plate, avoiding the additional contact resistance caused by separate connections. The structure of the first contact piece 321 is exactly the same as that of the second contact piece 331; both are elongated elastic conductive sheets, and their material, size, and thickness are identical.

[0070] Multiple first contact pieces 321 on the third side plate 32 are evenly spaced along the length of the second base plate 31. Multiple second contact pieces 331 on the fourth side plate 33 are arranged in a one-to-one correspondence with the first contact pieces 321. That is, the projection position of each second contact piece 331 on the second base plate 31 is completely aligned with the projection position of the corresponding first contact piece 321 on the second base plate 31, forming paired contact units. This symmetrical arrangement ensures that the clamping force on both sides of the body row 4 is uniform and symmetrical after insertion, avoiding displacement or poor contact of the body row 4 due to uneven force.

[0071] Furthermore, the segmented structure distributes the frictional force during the insertion of the main body bar 4 across multiple contact pieces. Compared to the surface friction of an integral side plate, this multi-point distributed friction significantly reduces insertion and extraction resistance, facilitating the operation of the drawer-type circuit breaker. Simultaneously, the contact pieces are made of a highly elastic material, maintaining good elasticity even after multiple insertions and extractions, reducing wear caused by friction and deformation, and extending the service life of the conductive bar 3 and the main body bar 4.

[0072] Additionally, the preset spacing refers to the straight-line distance between the clamping end of the first contact piece 321 and the corresponding clamping end of the second contact piece 331. The preset spacing is less than the thickness of the body row 4, and the difference between the two can be 0.5mm-2mm. For example, if the thickness of the body row 4 is 5mm, the preset spacing can be set to 3mm-4.5mm. When the body row 4 is inserted into the second clamping cavity, it will compress the clamping ends of the first contact piece 321 and the second contact piece 331, causing the contact pieces to elastically deform outward until the contact pieces are completely in contact with both sides of the body row 4. At this time, the elastic restoring force generated by the deformation of the contact pieces is converted into a clamping force on the body row 4, ensuring that there is no gap between the contact pieces and the body row 4.

[0073] Reference Figures 2 to 4 In some examples, the first side plate 22 includes a plurality of first pressure plates 221 spaced apart, the plurality of first pressure plates 221 being arranged one-to-one with a plurality of first contact plates 321, and the first pressure plates 221 abutting against the side of the first contact plate 321 away from the second contact plate 331.

[0074] By setting first pressure plates 221 on the first side plate 22 that correspond one-to-one with the first contact plates 321, not only can the rigidity of the first contact plates 321 be enhanced and the contact pressure compensated to ensure stable contact between the main body 4 and the first contact plates 321, but the current conduction path can also be optimized and the vibration resistance performance improved. In synergy with the multiple first contact plates 321 of the conductive busbar 3, the problems of unreliable contact and large resistance loss can be effectively solved.

[0075] Specifically, the first pressure plate 221 and the first side plate 22 are integrally formed, and multiple first pressure plates 221 are arranged at intervals on the first side plate 22, forming a comb-like structure similar to multiple first contact pieces 321 and the third side plate 32. Each first pressure plate 221 abuts against the side of the corresponding first contact piece 321 away from the second contact piece 331.

[0076] The length and width of each first pressure plate 221 are adapted to the corresponding first contact plate 321 so as to avoid interference between the first pressure plate 221 and other components while fully transmitting the clamping force, which is conducive to the stable cooperation between the clamping member 2 and the conductive busbar 3.

[0077] Reference Figures 2 to 4 When the main body 4 is inserted into the second clamping cavity, the first contact piece 321 is compressed and undergoes elastic deformation. The abutment of the first pressure piece 221 can provide additional rigid support for the first contact piece 321, reducing the possibility that the first contact piece 321 will have difficulty recovering from deformation and that the clamping force will decrease due to long-term use. At the same time, the first pressure piece 221 can also supplement the pressure required to clamp the main body 4 for the first contact piece 321, which has insufficient elasticity, to ensure that the conductive bar 3 and the main body 4 maintain close contact.

[0078] In some examples, the second side plate 23 includes a plurality of second pressure plates 231 spaced apart, the plurality of second pressure plates 231 being arranged one-to-one with a plurality of second contact plates 331, and the second pressure plates 231 abutting against the side of the second contact plates 331 away from the first contact plate 321.

[0079] The symmetrical contact between the second pressure plate 231 and the first pressure plate 221 causes the two sides of the body row 4 to be subjected to clamping forces of equal magnitude and opposite direction, forming a bidirectional clamping. This balanced force ensures that the body row 4 is in the center position in the second clamping cavity, avoiding poor contact on one side due to skewness, and at the same time, it keeps the pressure of each contact point consistent, which is beneficial to improving the electrical connection stability of the conductive component 100.

[0080] The arrangement and structure of the second pressure plate 231 are the same as those of the first pressure plate 221, and the cooperation between the multiple second pressure plates 231 and the multiple second contact pieces 331 is the same as the cooperation between the multiple first pressure plates 221 and the multiple first contact pieces 321. Specifically, the second pressure plate 231 and the second side plate 23 are an integral structure, and the multiple second pressure plates 231 are arranged at intervals on the second side plate 23, forming a comb-like structure like the multiple second contact pieces 331 and the fourth side plate 33. Each first pressure plate 221 abuts against the side of the corresponding second contact piece 331 away from the first contact piece 321.

[0081] Similarly, when the main body 4 is inserted into the second clamping cavity, the second contact piece 331 is compressed and undergoes elastic deformation. The contact of the second pressure piece 231 can provide additional rigid support for the second contact piece 331, reducing the possibility that the second contact piece 331 will have difficulty recovering from deformation and that the clamping force will decrease due to long-term use. At the same time, the second pressure piece 231 can also supplement the pressure required to clamp the main body 4 for the second contact piece 331, which has insufficient elasticity, further ensuring that the conductive busbar 3 and the main body 4 maintain close contact.

[0082] The first pressure plate 221 and the second pressure plate 231 can form a mutually cooperating clamping system. When the main body row 4 is inserted into the second clamping cavity of the conductive row 3, the first pressure plate 221 and the second pressure plate 231 deform synchronously and provide a balanced abutment force, ensuring that the contact pressure between the first contact piece 321 and the main body row 4, and between the second contact piece 331 and the main body row 4, is always within the set range. When the main body row 4 expands and contracts due to temperature changes, the first pressure plate 221 and the second pressure plate 231 can elastically adjust to adapt to its size changes synchronously, thereby enabling the first contact piece 321 and the second contact piece 331 to change accordingly, so as to maintain stable contact with the main body row 4 and effectively improve the reliability of the conductive component 100.

[0083] Reference Figures 2 to 4 In some examples, the first contact piece 321 has a first bending portion 3211, which bends away from the second contact piece 331. The second contact piece 331 has a second bending portion 3311, which bends away from the first contact piece 321.

[0084] The first bending portion 3211 and the second bending portion 3311 can form a guide structure between the first side plate 22 and the second side plate 23, which facilitates the insertion of the body row 4 into the second clamping cavity. On the other hand, while maintaining stable contact, they can reduce the contact area between the clamping member 2 and the body row 4, thereby reducing the contact resistance.

[0085] Specifically, the first bending portion 3211 is located at the clamping end of the first contact piece 321 away from the second base plate 31, and the second bending portion 3311 is located at the clamping end of the second contact piece 331 away from the second base plate 31. Since both the first bending portion 3211 and the second bending portion 3311 bend in a direction away from each other, the clamping end of the first contact piece 321 and the clamping end of the second contact piece 331 form a "trumpet mouth" shaped guide structure. The guide structure can guide the body row 4 during the insertion process. Even if there is a slight positional deviation of the body row 4, the insertion trajectory can be automatically corrected by the guiding effect of the first bending portion 3211 and the second bending portion 3311, ensuring that the body row 4 smoothly enters the preset clamping position, which greatly improves assembly efficiency and fault tolerance.

[0086] Meanwhile, the first bending portion 3211 and the second bending portion 3311 can prevent the sharp parts of the first contact piece 321 and the second contact piece 331 from directly contacting the main body row 4, reducing the scratch damage to the surface of the main body row 4 during insertion and removal, protecting the integrity of the conductive contact surface of the main body row 4, and reducing the risk of increased contact resistance due to contact surface damage.

[0087] When the first contact piece 321 is subjected to stress and deformation, the first bending portion 3211 can disperse the stress concentrated at the root of the first contact piece 321, avoiding fatigue fracture at the root of the first contact piece 321 due to long-term repeated deformation, thus extending the service life of the first contact piece 321. The same applies to the second bending portion 3311 and the second contact piece 331.

[0088] The symmetrical arrangement of the first bending portion 3211 and the second bending portion 3311 can ensure the consistency of the deformation of the first contact piece 321 and the second contact piece 331, ensuring that the body row 4 is subjected to balanced force during the clamping process, and further improving the stability of the conductive contact.

[0089] Furthermore, the bending angles of the first bending portion 3211 and the second bending portion 3311 are both greater than 30° and less than 60°.

[0090] By limiting the bending angle of the first bending portion 3211 and the second bending portion 3311 to this angle range, the first contact piece 321 and the second contact piece 331 can achieve the functions of the first bending portion 3211 and the second bending portion 3311 with a small deformation, thereby reducing the risk of damage to the first contact piece 321 and the second contact piece 331 due to excessive bending angle.

[0091] Correspondingly, the first pressing plate 221 and the second pressing plate 231 are also provided with bending portions. The bending portion of the first pressing plate 221 corresponds to the first bending portion 3211 of the first contact piece 321, and the bending portion of the second pressing plate 231 corresponds to the second bending portion 3311 of the second contact piece 331. This arrangement can further improve the tightness of the fit between the first pressing plate 221 and the first contact piece 321, as well as the tightness of the fit between the second pressing plate 231 and the second contact piece 331, thereby improving the reliability of the fit between the clamping member 2 and the conductive busbar 3, and thus improving the electrical connection stability between the conductive busbar 3 and the main body busbar 4.

[0092] Reference Figures 3 to 5 In some examples, the preset distance between at least one first contact piece 321 located on both sides of the third side plate 32 and the corresponding second contact piece 331 is smaller than the preset distance between the remaining first contact pieces 321 and the corresponding second contact pieces 331.

[0093] Specifically, among the plurality of first contact pieces 321 distributed along the length of the third side plate 32, the predetermined distance between at least one first contact piece 321 located at its two side edges (which may be 1-2 near the two ends of the first side plate 22) and the corresponding second contact piece 331 is significantly smaller than the predetermined distance between the remaining first contact pieces 321 located in the middle region of the third side plate 32 and the corresponding second contact piece 331. For example, referring to... Figure 5 The preset spacing of the middle contact piece is L1 (1.5mm), and the preset spacing of the two edge contact pieces can be set to L2 (1.0-1.2mm). The specific difference can be adjusted according to the rated short-time withstand current parameters of the circuit breaker.

[0094] Electric field simulation and experimental verification show that the distribution of electro-repulsive force is not uniform. Because the contact pieces on both sides are closer to the boundary of the conductive circuit and there is no electric field shielding effect from other contact pieces around them, the electro-repulsive force they experience is significantly greater than that on the contact pieces in the middle. If all contact pieces use the same preset spacing, the contact pieces on both sides are prone to excessive deformation under the action of larger electro-repulsive force, resulting in contact gaps between them and the main body, causing faults such as arcing and burning, which seriously affects the short-time withstand performance of the circuit breaker.

[0095] Based on the above characteristics, by reducing the preset distance between the first contact piece 321 and the second contact piece 331, which are located opposite each other on both sides of the clamping member 2, the body row 4 can obtain a greater initial clamping force at this position. A smaller distance means a more significant interference fit, and the first contact piece 321 and the second contact piece 331 have a greater degree of elastic deformation, resulting in a stronger clamping force. This can effectively counteract the electrodynamic repulsion force during a short circuit, preventing the first contact piece 321 from separating from the body row 4 and the second contact piece 331 from the body row 4 at this position, thus ensuring the continuity and reliability of the contact.

[0096] On the other hand, the strong clamping force of the contact pieces on both sides can provide a positioning effect for the body row 4, restrict the lateral displacement of the body row 4 under the action of electric power, and thus drive the middle contact piece to maintain a stable fit with the body row 4.

[0097] Reference Figures 3 to 6 In some examples, the third side plate 32 further includes a plurality of third contact pieces (not shown in the figure), which are spaced apart on both sides of the third side plate 32, and the width of the third contact pieces is greater than the width of the first contact piece 321. The fourth side plate 33 further includes a plurality of fourth contact pieces (not shown in the figure), which are spaced apart on both sides of the second side plate 23, and the width of the fourth contact pieces is greater than the width of the second contact piece 331, and the plurality of fourth contact pieces are configured in a one-to-one correspondence with the plurality of third contact pieces.

[0098] By providing widened third and fourth contact pieces at the two sides of the first side plate 22, the clamping force is enhanced by increasing the structural dimensions, thereby overcoming the greater electric repulsive force on the two sides of the clamping member 2, so that the body row 4 can be stably clamped on the clamping member 2.

[0099] Specifically, the third contact pieces are spaced apart at the two edges of the third side plate 32, and the width of the third contact pieces is greater than the width of the first contact pieces 321. For example, the width of the first contact piece 321 can be 5-8mm, and the width of the third contact piece can be set to 10-15mm. The specific dimensions can be adapted to the overall specifications of the clamping member 2 and the required clamping force. The third contact pieces, the third side plate 32, and the first contact pieces 321 are integrally formed from the same material to ensure structural integrity and electrical continuity.

[0100] Under the same material and degree of deformation, the wider third contact piece has a higher moment of inertia and can generate a greater restoring force during elastic deformation. That is, the clamping force increases significantly with the increase of width, which can effectively compensate for the large electric repulsion force on the third contact pieces on both sides of the third side plate 32 under short-circuit conditions and avoid contact separation due to excessive repulsion force.

[0101] Meanwhile, the widened design of the third contact piece optimizes the current conduction path. Since the edge contact pieces on both sides are at critical positions for current distribution in the conductive circuit, the widened third contact piece increases the conductive cross-sectional area, reduces its own resistance loss, and minimizes localized overheating caused by current concentration. Furthermore, the wider contact piece has a larger contact area with the main body row 4, further reducing contact resistance.

[0102] In addition, the third contact piece is only set on both sides of the first side plate 22 and arranged at intervals. This can enhance the performance of key positions while avoiding redundancy in the overall structure. The middle area of ​​the third side plate 32 still uses the first contact piece 321 of conventional width, which can ensure the uniformity of the overall clamping and control the overall weight and material cost of the clamping part 2.

[0103] The fourth contact pieces are also spaced apart on both sides of the fourth side plate 33, and their number and arrangement correspond perfectly with the third contact pieces on the third side plate 32, forming a pair of clamping units. The width of the fourth contact piece is greater than the width of the other second contact pieces 331 on the fourth side plate 33, and its width dimension is consistent with that of the third contact pieces. The fourth contact piece, the fourth side plate 33, and the second contact pieces 331 are integrally formed using the same conductive material to ensure the structural integrity and conductive continuity with the fourth side plate 33.

[0104] The third contact pieces on both sides of the third side plate 32 are widened to enhance the clamping force and resist the electric repulsion force during short circuits. The fourth contact pieces on the corresponding positions of the fourth side plate 33 are designed with the same width, so that the clamping units on both sides can form clamping forces of equal size and opposite direction. This ensures that the main body row 4 is subjected to completely symmetrical force in the clamping state, and avoids the main body row 4 from shifting or tilting due to excessive clamping force on one side, thereby preventing problems such as poor local contact or uneven contact resistance.

[0105] The widened structure of the fourth contact piece also enhances the conductivity and burn-resistance at the edge. At the same time, the larger contact area can disperse the local high temperature generated by the short-circuit arc, slow down the oxidation and ablation rate of the contact piece surface, and improve the short-term current withstand capability and service life of the clamping component 2.

[0106] In contrast, refer to Figures 3 to 6 The first side plate 22 is provided with a third pressure plate 222 corresponding to the third contact piece, and the second side plate 23 is provided with a fourth pressure plate 232 corresponding to the fourth contact piece. The matching form between the third pressure plate 222 and the third contact piece is the same as the matching form between the first pressure plate 221 and the first contact piece 321. The matching form between the fourth pressure plate 232 and the fourth contact piece is the same as the matching form between the second pressure plate 231 and the second contact piece 331. They have the same technical effect and will not be described in detail here.

[0107] Reference Figure 3 and Figure 4 In some examples, the busbar 1, the first base plate 21, and the second base plate 31 are all provided with fixing holes and are interconnected. The fixing holes are provided with connectors 5 to fix the busbar 1, the clamping member 2, and the conductive busbar 3.

[0108] The integrated connection between busbar 1, clamping member 2 and conductive busbar 3 through fixing holes and connector 5 solves the problem of multiple dynamic contact points and unreliable connection in traditional structures. It effectively improves the electrical connection stability between clamping member 2 and busbar 1, and between conductive busbar 3 and busbar 1, thereby reducing the risk of increased contact resistance and keeping the temperature rise of conductive component 100 stable.

[0109] In this embodiment, the busbar 1, the first base plate 21, and the second base plate 31 are all provided with fixing holes. The connector 5 is simultaneously inserted into the fixing holes of the three to achieve a fixed connection between them, so that a large area of ​​direct metal contact is formed between the mating surfaces, eliminating contact gaps and effectively reducing contact resistance. At the same time, the connector 5 (especially conductive bolts and rivets) can serve as an auxiliary conductive path to divert the current on the mating surfaces, further reducing overall resistance loss, reducing Joule heat generation, and helping to achieve the low temperature rise target.

[0110] Furthermore, the integrated fixed connection makes the busbar 1, clamping member 2, and conductive busbar 3 form a rigid whole, which significantly increases the natural frequency of the structure and greatly enhances its vibration resistance.

[0111] The symmetrical distribution and precise alignment of the fixing holes eliminate the need for complex adjustment procedures during assembly. Operators can quickly complete the assembly by visual alignment or using simple tooling.

[0112] In an alternative embodiment, the busbar 1, the clamping member 2, and the conductive busbar 3 can also be fixed as a whole by riveting or welding. These two connection methods have higher connection strength, and welding can also eliminate the contact resistance between the fixing hole and the connector 5, resulting in better conductivity.

[0113] This application also provides a drawer-type circuit breaker, including the conductive component 100 described above.

[0114] By using the conductive component 100 provided in this embodiment, the total resistance of the conductive component 100 is effectively reduced by reducing dynamic contact points and adopting a low-resistance fixed connection design, which helps to reduce temperature rise. The reduction in temperature rise directly extends the service life of the circuit breaker.

[0115] Furthermore, the conductive component 100 provided in this embodiment effectively solves the problem that multiple dynamic contact points in traditional drawer-type circuit breakers are prone to false contact due to vibration and oxidation, which in turn leads to electric arcing and component ablation, thereby enhancing the reliability of the drawer-type circuit breaker and reducing the failure risk of the drawer-type circuit breaker.

[0116] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A conductive component, characterized in that, include: Mother bar; The clamping member includes a first base plate, a first side plate, and a second side plate. The first side plate and the second side plate are disposed opposite to each other on the two sides of the first base plate and enclose a first clamping cavity. The first base plate is fixedly connected to the busbar. The conductive bus includes a second base plate, a third side plate, and a fourth side plate. The third side plate and the fourth side plate are disposed opposite to each other on the two sides of the second base plate and enclose each other to form a second clamping cavity. The conductive busbar is installed in the first clamping cavity, and the opening of the second clamping cavity faces the same direction as the opening of the first clamping cavity. The second base plate is fixedly connected to the first base plate. The main body is capable of being inserted into and removed from the second clamping cavity, and when the main body is inserted into the second clamping cavity, its two sides are in contact with the third side plate and the fourth side plate respectively, and are electrically conductive.

2. The conductive component according to claim 1, characterized in that, The first side plate and the second side plate both form a first acute angle with the first bottom plate, and the third side plate and the fourth side plate both form a second acute angle with the second bottom plate.

3. The conductive component according to claim 2, characterized in that, The third side plate includes a plurality of first contact pieces spaced apart, and the fourth side plate includes a plurality of second contact pieces spaced apart. The plurality of first contact pieces and the plurality of second contact pieces are arranged in a one-to-one correspondence, and there is a preset distance between the clamping end of the first contact piece and the clamping end of the second contact piece. The preset distance is less than the thickness of the body row.

4. The conductive component according to claim 3, characterized in that, The first side plate includes a plurality of first pressure plates spaced apart, the plurality of first pressure plates being arranged one-to-one with the plurality of first contact plates, and the first pressure plates abutting against the side of the first contact plate away from the second contact plate.

5. The conductive component according to claim 3, characterized in that, The second side plate includes a plurality of second pressure plates spaced apart, the plurality of second pressure plates being arranged one-to-one with the plurality of second contact plates, and the second pressure plates abutting against the side of the second contact plate away from the first contact plate.

6. The conductive component according to any one of claims 3-5, characterized in that, The first contact piece has a first bent portion, which bends away from the second contact piece; the second contact piece has a second bent portion, which bends away from the first contact piece.

7. The conductive component according to any one of claims 3-5, characterized in that, The preset distance between at least one first contact piece located on both sides of the third side plate and the corresponding second contact piece is smaller than the preset distance between the remaining first contact pieces and the corresponding second contact pieces.

8. The conductive component according to any one of claims 3-5, characterized in that, The third side plate further includes a plurality of third contact pieces, which are spaced apart on both sides of the third side plate, and the width of the third contact pieces is greater than the width of the first contact pieces; the fourth side plate further includes a plurality of fourth contact pieces, which are spaced apart on both sides of the second side plate, and the width of the fourth contact pieces is greater than the width of the second contact pieces, and the plurality of fourth contact pieces are configured in a one-to-one correspondence with the plurality of third contact pieces.

9. The conductive component according to claim 1, characterized in that, The busbar, the first base plate, and the second base plate are all provided with fixing holes and are interconnected. The fixing holes are provided with connectors to fix the busbar, the clamping member, and the conductive bar.

10. A drawer-type circuit breaker, characterized in that, Includes the conductive component as described in any one of claims 1-9.

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