Capacitor
By incorporating mounting slots and isolation structures for the terminal block within the capacitor, combined with rubber rings and insulating plates, the problems of creepage and short circuits during capacitor use are solved, improving safety and reliability and reducing the risk of electric shock.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-20
- Publication Date
- 2026-03-31
AI Technical Summary
During use, creepage can easily occur between the terminal rod and the casing of a capacitor, increasing the risk of electric shock to operators and potentially causing short circuits in the capacitor components, thus affecting safety and reliability.
A capacitor structure was designed, in which the terminal block is provided with a mounting groove and an isolation structure, the terminal rod is connected to the inside of the housing through the mounting hole to increase the creepage distance, and the insulation is improved by the rubber ring and the insulating plate to reduce the risk of short circuit.
This effectively reduces creepage between the terminal block and the casing, improves the safety and reliability of the capacitor, reduces the probability of electric shock and short circuit, and enhances the capacitor's sealing performance and installation efficiency.
Smart Images
Figure CN224067555U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of electrical equipment technology, and more particularly to a capacitor. Background Technology
[0002] A capacitor is an electronic component capable of storing electrical charge. Capacitors are widely used in power electronic equipment, extensively applied in circuits for DC blocking and AC transmission, coupling, bypassing, filtering, tuning circuits, and energy conversion. With increasing power loads, a large number of capacitors are needed to reduce power transmission losses, increase power transmission capacity, and compensate for reactive power. However, capacitors are consumables and may be damaged during use, requiring replacement.
[0003] In the prior art, the capacitor elements of a capacitor are usually housed within the housing space. These capacitor elements are typically electrically connected to an external power source via capacitor terminals. The terminals need to be inserted into the capacitor housing. During capacitor use, creepage can easily occur between the terminals and the capacitor housing, which poses a risk of electric shock to operators during use or replacement of the capacitor. Utility Model Content
[0004] This application provides a capacitor to improve the safety of the capacitor during use and replacement.
[0005] In a first aspect, this application provides a capacitor, comprising: a housing, a terminal block, and a connecting rod. The housing has a first mounting hole. The terminal block is disposed on the housing and has a mounting groove and a second mounting hole. The opening of the mounting groove faces the housing, and the second mounting hole communicates with the mounting groove. An isolation structure is provided at the bottom of the mounting groove. The second mounting hole and the first mounting hole are positioned opposite each other, and the diameter of the first mounting hole is larger than the diameter of the second mounting hole. The connecting rod includes a first end that passes through the first mounting hole and the second mounting hole and enters the interior of the housing. The isolation structure is located between the first end and the wall of the first mounting hole.
[0006] Through the above solution, this application provides a terminal block with a second mounting hole, which can provide a mounting base for the connector rod. A first mounting hole is provided on the housing, and the positions of the first mounting hole and the second mounting hole correspond. When the connector rod is inserted into the second mounting hole, it can enter the housing through the first mounting hole. In this way, the capacitor element inside the housing can be electrically connected to an external power source through the connector rod.
[0007] A mounting groove is provided on the side of the terminal block facing the housing. When the diameter of the first mounting hole is larger than the diameter of the second mounting hole, and the diameter of the first mounting hole is smaller than the groove diameter, after the terminal rod is inserted into the mounting block, there can be a certain distance between the side wall of the terminal rod and the wall of the first mounting hole. The current flowing through the terminal rod must first flow through the bottom of the groove, then through the groove wall, before flowing into the housing. Therefore, the mounting groove increases the creepage distance between the terminal rod and the housing, reducing the probability of creepage and thus improving the safety of the capacitor.
[0008] An isolation structure is installed at the bottom of the mounting slot to separate the terminal rod from the wall of the first mounting hole. When current flows into the mounting slot, it must pass over the surface of the isolation structure before flowing into the housing. This increases the distance the current travels from the terminal rod to the housing. Therefore, the isolation structure further increases the creepage distance between the terminal rod and the housing, thereby improving the safety of the capacitor and reducing the probability of accidents during use or replacement.
[0009] In one possible design, the isolation structure is a groove formed on the bottom of the mounting slot. The groove forms a ring around the second mounting hole.
[0010] Through the above solution, as the current flows through the bottom and walls of the mounting groove to the housing, it also needs to flow over the surface of the groove. Therefore, the groove increases the distance the current travels from the connecting rod to the housing, thus increasing the creepage distance between the connecting rod and the housing. This improves the safety of the capacitor and reduces the probability of accidents during use or replacement. Since current chooses the shortest path when flowing over a surface, when the annular groove surrounds the second mounting hole, the current must first pass through the isolation structure before flowing into the housing. This reduces the probability of current flowing out through gaps in the isolation structure without passing over its surface, improving the reliability of the isolation structure during use.
[0011] In one possible design, the isolation structure consists of multiple raised structures on the bottom of the mounting groove. These raised structures are connected sequentially and arranged around the edge of the second mounting hole.
[0012] Through the above scheme, as the current flows through the bottom and walls of the mounting groove to the housing, it also needs to flow through the raised surface. Therefore, the raised structure increases the distance the current travels from the connecting rod to the housing, thus increasing the creepage distance between the connecting rod and the housing. This improves the safety of the capacitor and reduces the probability of accidents during use or replacement. Since current chooses the shortest path when flowing over a surface, when multiple raised structures are connected in sequence and surround the edge of the second mounting hole, the current must first pass through the isolation structure before flowing into the housing. This reduces the probability of current flowing out through gaps in the isolation structure without passing through its surface, thus improving the reliability of the isolation structure during use.
[0013] In one possible design, a rubber ring is also included, which is fitted onto the first end.
[0014] The above solution utilizes the rubber ring, an insulating material. When the rubber ring is fitted onto the first end, it reduces the probability of a short circuit between the terminal rod and the capacitor element inside the cavity, thereby improving the reliability of the capacitor.
[0015] In one possible design, there are multiple terminal blocks, each with a rubber ring fitted at its first end. The sides of these rubber rings furthest from the terminal block are connected by a rubber plate, forming a single unit.
[0016] The above solution utilizes a rubber sheet to connect multiple rubber rings into a single unit. When current flows through the rubber rings, it must then flow through the rubber sheet before reaching the casing. This increases the creepage distance between the terminal block and the casing, thereby improving the safety of the capacitor and reducing the probability of accidents during use or replacement. Furthermore, because the rubber sheet connects multiple rubber rings simultaneously, its area is typically large, allowing it to cover the area near the first mounting hole, thus increasing the capacitor's sealing performance.
[0017] In one possible design, an insulating plate is also included, positioned on the side of the rubber plate away from the terminal block. The insulating plate has a third mounting hole, through which the first end passes.
[0018] The above solution addresses this issue by using an insulating plate to increase the force on the nut, which is relatively soft and requires a secure connection at the first end. This increases the tightening force on the nut, making the tightening process easier. Furthermore, it reduces the likelihood of the nut loosening due to unstable force during capacitor use, thus improving the capacitor's reliability. The insulating plate also increases the creepage distance between the terminal block and the casing, enhancing capacitor safety and reducing the probability of accidents during use or replacement.
[0019] In one possible design, the diameter of the first mounting hole is smaller than the diameter of the mounting groove, and a limiting element is provided on the side of the housing facing the terminal block. The limiting element contacts the groove wall of the mounting groove.
[0020] Through the above solution, the limiting component can limit the position of the terminal block, reducing the possibility of relative displacement between the terminal block and the housing, and improving the reliability of the terminal block. Furthermore, during the installation process, the limiting component can also guide the installation of the terminal block, reducing the difficulty of installation and improving installation efficiency.
[0021] In one possible design, the terminal block has a limiting groove on the side away from the housing, which communicates with the second mounting hole, making the second mounting hole stepped. The terminal rod also includes a second end, which is positioned opposite the first end and has a limiting block. The limiting block abuts against the bottom of the limiting groove.
[0022] The above solution, with the setting of the limit block, can limit the position of the terminal rod, reducing the probability of the terminal rod rotating in the second mounting hole, thereby improving the reliability of the capacitor.
[0023] In one possible design, an insulating cover is also included, which encloses the terminal block. The second end is located inside the insulating cover.
[0024] With the above solution, the insulating cover is placed on the terminal block, and the second end is located inside the insulating cover. This reduces the probability of electric shock caused by operators accidentally touching the second end of the terminal block during the use or replacement of the capacitor, thus improving the safety of the capacitor during use or replacement.
[0025] In one possible design, the capacitor also includes a capacitor element. The housing has a receiving cavity in which the capacitor element is located. A terminal is electrically connected to the capacitor element.
[0026] By employing the above method, the capacitor element is housed within the enclosure, and the casing protects it. The connecting rod allows the capacitor element within the enclosure to be electrically connected to an external power source, thus enabling the capacitor to function properly. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of the overall structure of the capacitor provided in an embodiment of this application.
[0028] Figure 2 This is a schematic diagram of the capacitor provided in the embodiment of this application without the insulating cover installed.
[0029] Figure 3 This is a schematic diagram of the structure of the housing provided in an embodiment of this application.
[0030] Figure 4 This is a schematic diagram of the terminal block provided in an embodiment of this application from one perspective.
[0031] Figure 5 This is a schematic diagram of the structure of the connector provided in an embodiment of this application.
[0032] Figure 6 A cross-sectional view of a capacitor provided in an embodiment of this application in one state.
[0033] Figure 7 This is a schematic diagram of the connection between the rubber ring and the rubber plate provided in an embodiment of this application.
[0034] Figure 8 A cross-sectional view of the capacitor provided in an embodiment of this application in another state.
[0035] Figure 9 This is a schematic diagram of the terminal block provided in an embodiment of this application from another perspective.
[0036] Explanation of reference numerals in the attached figures:
[0037] 100. Terminal block; 110. Mounting slot; 120. Second mounting hole; 130. Isolation structure; 140. Limiting slot;
[0038] 200. Connecting rod; 210. First end; 220. Second end; 221. Limit block;
[0039] 300. Rubber ring;
[0040] 400. Rubber sheet;
[0041] 500, Insulation board;
[0042] 600, Insulating cover;
[0043] 700. Housing; 710. Top cover; 711. First mounting hole; 712. Limiting component; 720. Base;
[0044] 800, Nut. Detailed Implementation
[0045] 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.
[0046] 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.
[0047] 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.
[0048] 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.
[0049] 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.
[0050] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure 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 used 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.
[0051] 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.
[0052] 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.
[0053] 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.
[0054] Figure 1 This is a schematic diagram of the overall structure of the capacitor provided in an embodiment of this application. Figure 2 This is a schematic diagram of the capacitor provided in an embodiment of this application without the insulating cover installed. Figure 1 as well as Figure 2 As shown, this application provides a capacitor including a housing 700 and a capacitor element. The housing 700 has a receiving cavity, within which the capacitor element is located. The capacitor also includes a connecting rod 200, which is electrically connected to the capacitor element.
[0055] The housing 700 includes a top cover 710 and a base 720. A receiving cavity is disposed in the base 720, and a capacitor element is installed in the receiving cavity. The top cover 710 can be placed on the base 720 to protect the capacitor element in the receiving cavity.
[0056] The connecting rod 200 allows the capacitor element inside the housing to be electrically connected to an external power source. The capacitor also includes a terminal block 100, which is mounted on the top cover 710. The connecting rod 200 is inserted into the terminal block 100 and extends into the housing. One end of the connecting rod 200 inside the housing can be electrically connected to the capacitor element, and the other end outside the housing can be electrically connected to an external power source, thus achieving electrical connection between the capacitor element and the external power source.
[0057] During capacitor use, current flows through the terminal rod 200. Part of the terminal rod 200 is inserted into the terminal block 100, while the other part is located within the receiving cavity of the housing 700. Because the terminal block 100 is typically made of insulating material, current generally does not flow into the terminal block 100 when passing through the terminal rod 200 inserted into it. However, creepage may occur between the terminal rod 200 and the terminal block 100, potentially causing the housing 700 to become energized. The terminal rod 200 located within the receiving cavity is often exposed to air; therefore, when current flows through the end of the terminal rod 200 within the receiving cavity, a short circuit may occur between it and the capacitor element within the cavity.
[0058] Figure 3 This is a schematic diagram of the structure of the housing provided in an embodiment of this application. Figure 4 This is a schematic diagram of the terminal block provided in an embodiment of this application from one viewpoint. Figures 2 to 4 As shown, this application provides a capacitor, which includes: a terminal block 100. A housing 700 is provided with a first mounting hole 711.
[0059] A terminal block 100 is disposed on the housing 700. The terminal block 100 is provided with a mounting groove 110 and a second mounting hole 120. The groove opening of the mounting groove 110 faces the housing 700. The second mounting hole 120 communicates with the mounting groove 110. An isolation structure 130 is provided at the bottom of the mounting groove 100. The second mounting hole 120 is opposite to the first mounting hole 711. The diameter of the first mounting hole 711 is larger than the diameter of the second mounting hole 120.
[0060] The terminal block 100 can be a long strip, and it can be made of insulating material. When the terminal block 100 is mounted on the housing 700, it can be placed directly on the top cover 710. The mounting groove 110 can be a blind groove structure opened along the thickness direction of the terminal block 100, and the opening of the mounting groove 110 can face the top cover 710. The isolation structure 130 can be a protrusion or groove structure with the bottom of the mounting groove 110 facing the top cover 710.
[0061] The second mounting hole 120 can be a through hole structure opened along the thickness direction of the terminal block 100. The second mounting hole 120 can be a circular hole or a square hole, etc. The second mounting hole 120 can be opened from the side of the terminal block 100 facing away from the top cover 710 and communicate with the mounting groove 110. Alternatively, the second mounting hole 120 can be opened from the bottom of the mounting groove 110. The diameter of the second mounting hole 120 can be smaller than the diameter of the mounting groove 110 so that there is enough space at the bottom of the mounting groove 110 to install the isolation structure 130.
[0062] The first mounting hole 711 can be a through hole structure opened on the top cover 710, and the setting of the first mounting hole 711 can make the receiving cavity communicate with the external environment. When the mounting base is placed on the top cover 710, the center of the first mounting hole 711 is opposite to the center of the second mounting hole 120, and at this time, the first mounting hole 711 and the second mounting hole 120 are in communication.
[0063] Figure 5 This is a schematic diagram of the structure of the connector provided in an embodiment of this application. Figure 6 A cross-sectional view of a capacitor provided in an embodiment of this application in one state. (See attached image.) Figures 3 to 6 As shown, the connector 200 includes a first end 210, which passes through the first mounting hole 711 and the second mounting hole 120 and enters the interior of the housing 700. The isolation structure 130 is located between the first end 210 and the hole wall of the first mounting hole 711.
[0064] The connector 200 can be a long rod, and can be made of conductive material. The connector 200 includes a first end 210 and a second end 220 that are positioned opposite each other. The first end 210 of the connector 200 is provided with external threads, and the second end 220 of the connector 200 is provided with a pressure plate.
[0065] When the terminal block 100 is placed on the top cover 710, the second mounting hole 120 is positioned opposite the first mounting hole 711. At this time, the first end 210 of the terminal rod 200 is passed through the second mounting hole 120 and the first mounting hole 711 in sequence, so that the first end 210 of the terminal rod 200 enters the receiving cavity. When the pressure plate provided on the second end 220 of the terminal rod 200 abuts against the side of the terminal block 100 away from the top cover 710, the terminal rod 200 is limited and cannot move further into the receiving cavity. At this time, the nut 800 is engaged with the external thread provided on the first end 210 of the terminal rod 200. After tightening the nut 800, the terminal block 100 can be fixed on the top cover 710.
[0066] The diameter of the first mounting hole 711 is larger than the diameter of the second mounting hole 120, and the diameter of the first mounting hole 711 is smaller than the diameter of the mounting groove 110. When the radial dimension of the nut 800 is smaller than the diameter of the first mounting hole 711, the nut 800 can abut against the isolation structure 130 set on the bottom of the mounting groove 110 after being tightened.
[0067] In summary, this application provides a terminal block 100 with a second mounting hole 120 to provide a mounting base for the connector 200. A first mounting hole 711 is provided on the housing 700, and the positions of the first mounting hole 711 and the second mounting hole 120 correspond. When the connector 200 is inserted into the second mounting hole 120, it can enter the housing 700 through the first mounting hole 711. Thus, the capacitor components inside the housing 700 can be electrically connected to an external power source through the connector 200.
[0068] A mounting groove 110 is provided on the side of the terminal block 100 facing the housing 700. When the diameter of the first mounting hole 711 is larger than the diameter of the second mounting hole 120, after the terminal rod 200 is inserted into the mounting block, there can be a certain distance between the side wall of the terminal rod 200 and the wall of the first mounting hole 711. The current flowing through the terminal rod 200 must first flow through the bottom of the mounting groove 110, and then through the wall of the mounting groove 110 before flowing into the housing 700. Therefore, the mounting groove 110 increases the creepage distance between the terminal rod 200 and the housing 700, reducing the probability of creepage between the terminal rod 200 and the housing 700, thus improving the safety of the capacitor.
[0069] An isolation structure 130 is provided at the bottom of the mounting groove 110, and the isolation structure 130 is used to separate the terminal rod 200 from the wall of the first mounting hole 711. When the current flows into the mounting groove 110, it must flow through the surface of the isolation structure 130 before it can flow into the housing 700. This increases the distance the current travels from the terminal rod 200 to the housing 700. Therefore, the isolation structure 130 can further increase the creepage distance between the terminal rod 200 and the housing 700, thereby improving the safety of the capacitor and reducing the probability of safety accidents during use or replacement.
[0070] For example, the bottom of the mounting groove 110 can be the side wall of the mounting groove 110 opposite to the groove opening, and the groove wall of the mounting groove 110 can be the other side walls of the mounting groove excluding the bottom.
[0071] The isolation structure 130 can be configured in several ways. Two of them will be explained in detail below with reference to the attached drawings.
[0072] The first setting method: such as Figure 3 As shown, the isolation structure 130 can be a groove provided on the bottom of the mounting groove 110. The groove can form an annular shape around the second mounting hole 120.
[0073] The second mounting hole 120 communicates with the mounting groove 110, and both the second mounting hole 120 and the mounting groove 110 are opened along the thickness direction of the terminal block 100, so that the second mounting hole 120 is connected to the bottom of the mounting groove 110. When the groove is set at the bottom of the mounting groove 110, it needs to avoid the second mounting hole 120. The groove can be set at the bottom of the mounting groove 110 by grooving or engraving after the terminal block 100 is formed, or the groove can be integrally formed with the terminal block 100 during the forming process.
[0074] The groove can be a blind groove structure opened on the bottom of the mounting groove 110. The groove opening direction can be the same as the groove opening direction of the mounting groove 110. The groove has a groove bottom and groove walls. The groove bottom can be the side wall of the groove opposite to the groove opening, and the groove walls can be the other side walls of the groove except for the groove bottom.
[0075] When the first setting is selected, the current needs to flow through the bottom and wall of the mounting groove 110 to the housing 700, and also through the surface of the groove. Therefore, the setting of the groove can increase the current flow distance from the terminal rod 200 to the housing 700. This can increase the creepage distance between the terminal rod 200 and the housing 700, thereby improving the safety of the capacitor and reducing the probability of safety accidents during the use or replacement of the capacitor.
[0076] Since current will choose the shortest distance when flowing through the surface of an object, when the annular groove surrounds the second mounting hole 120, the current can pass through the isolation structure 130 before flowing into the housing 700. This reduces the probability of current flowing out from the gap in the isolation structure 130 without passing through the surface of the isolation structure 130 due to the gap in the isolation structure 130, and improves the reliability of the isolation structure 130 during use.
[0077] For example, the surface of the groove can be the bottom of the groove and the wall of the groove.
[0078] The second configuration: The isolation structure 130 can be multiple raised structures provided on the bottom of the mounting groove 110. The multiple raised structures are connected in sequence and arranged around the edge of the second mounting hole 120.
[0079] The raised structure can be a circular raised structure, a square raised structure, or an irregularly shaped raised structure. The raised structure can be set at the bottom of the mounting groove 110 by snap-fit or adhesive after the terminal block 100 is formed, or the raised structure can be integrally formed with the terminal block 100 during the forming process.
[0080] In one possible embodiment, the protrusion structure may also be an annular protrusion surrounding the second mounting hole 120.
[0081] One sidewall of the protruding structure can be connected to the bottom of the mounting groove 110, and the other sidewalls of the protruding structure can be the surface of the protruding structure.
[0082] When the second configuration is selected, the current needs to flow through the bottom and wall of the mounting groove 110 to the housing 700, and also through the surface of the raised structure. Therefore, the raised structure can increase the distance the current travels from the connecting rod 200 to the housing 700. This increases the creepage distance between the connecting rod 200 and the housing 700, thereby improving the safety of the capacitor and reducing the probability of safety accidents during use or replacement.
[0083] Since current will choose the shortest distance when flowing through the surface of an object, when multiple protrusions are connected in sequence and surround the edge of the second mounting hole 120, the current can pass through the isolation structure 130 before flowing into the housing 700. This reduces the probability of current flowing out of the gap in the isolation structure 130 without passing through the surface of the isolation structure 130 due to the gap in the isolation structure 130, and improves the reliability of the isolation structure 130 during use.
[0084] As can be seen from the above description, regardless of the arrangement of the isolation structure 130, it must be arranged in a ring around the second mounting hole 120 in order to ensure the reliability of the isolation structure 130 during use.
[0085] Figure 7 This is a schematic diagram illustrating the connection between the rubber ring and the rubber sheet, as provided in an embodiment of this application. Figures 3 to 7 As shown, the capacitor also includes a rubber ring 300, which is sleeved on the first end 210.
[0086] Rubber Ring 300 is a ring-shaped seal made of rubber material.
[0087] In some possible embodiments, the sidewall of the rubber ring 300 may contact the wall of the first mounting hole 711.
[0088] Since the diameter of the mounting groove 110 is larger than the diameter of the first mounting hole 711, after the terminal block 100 is installed on the top cover 710, there will be a gap between the groove wall of the mounting groove 110 and the hole wall of the first mounting hole 711. At this time, the side wall of the rubber ring 300 contacts the hole wall of the first mounting hole 711, which can increase the sealing at the first mounting hole 711, thereby increasing the sealing of the housing 700.
[0089] Figure 6 The state shown is the state of the capacitor when the rubber ring 300 is fitted onto the first end 210 and the nut 800 is not tightened. Figure 7 As shown, when the connecting rod 200 passes through the first mounting hole 711 and enters the receiving cavity, the rubber ring 300 can be fitted onto the first end 210, and the rubber ring 300 can be located between the nut 800 and the bottom of the mounting groove 110.
[0090] Figure 8 A cross-sectional view of the capacitor provided in an embodiment of this application in another state. Figure 8 The state shown is the state of the capacitor when the rubber ring 300 is fitted onto the first end 210 and the nut 800 is tightened, as follows: Figure 4 , Figure 5 as well as Figure 8 As shown, since the terminal block 100 is usually made of a harder material, while the rubber ring 300 is usually made of a softer material, when the nut 800 is tightened, the rubber ring 300 will be squeezed against the bottom of the mounting groove 110. The bottom of the mounting groove 110 is provided with an isolation structure 130. When the rubber ring 300 is squeezed against the bottom of the groove, it can fill the gap in the mounting groove 110 caused by the isolation structure 130. By filling the gap with the rubber ring 300, the distribution of the electric field in the isolation structure 130 can be changed, thereby increasing the creepage distance between the terminal rod 200 and the housing 700 and improving the safety of the capacitor.
[0091] In summary, the rubber ring 300 is an insulating material. When the rubber ring 300 is fitted onto the first end 210, it can reduce the probability of a short circuit between the connecting rod 200 and the capacitor element in the receiving cavity, thereby improving the reliability of the capacitor.
[0092] like Figure 4 as well as Figures 5 to 7 As shown, there are multiple terminal blocks 200, and each terminal block 200 has a rubber ring 300 fitted on its first end 210. The side of the multiple rubber rings 300 away from the terminal block 100 is connected by a rubber plate 400, so that the multiple rubber rings 300 form a whole.
[0093] In the prior art, capacitors often use multiple capacitor elements stacked one on top of the other. Each column of capacitor elements is connected to the terminal bar 200 by a wire. Multiple columns of capacitor elements need to be connected to multiple terminal bars 200 respectively.
[0094] When there are multiple terminals 200, in order to improve the safety and reliability of the capacitor during use or disassembly, a rubber ring 300 can be fitted on the first end 210 of each terminal 200.
[0095] The rubber plate 400 can be a plate-shaped structure made of rubber provided on the side of the rubber ring 300 away from the bottom of the mounting groove 110. The rubber plate 400 can be connected to multiple rubber rings 300 simultaneously, so that the multiple rubber rings 300 and the rubber plate 400 can form a whole. The rubber plate 400 can be provided with a through hole for the first end 210 to pass through, and the through hole can correspond to the position of the first mounting hole 711.
[0096] Through the above configuration, multiple rubber rings 300 are connected by a rubber plate 400 to form a whole. When the nut 800 is tightened, the rubber plate 400 will be in contact with the housing 700. After the current flows through the rubber rings 300, it must also flow through the rubber plate 400 before reaching the housing 700. This increases the creepage distance between the terminal rod 200 and the housing 700, thereby improving the safety of the capacitor and reducing the probability of safety accidents during use or replacement. Furthermore, since the rubber plate 400 needs to connect multiple rubber rings 300 simultaneously, the area of the rubber plate 400 is usually large. This allows the rubber plate 400 to cover the area near the first mounting hole 711, thereby increasing the sealing performance of the capacitor.
[0097] like Figure 4 , Figure 7 as well as Figure 8As shown, the capacitor also includes an insulating plate 500, which is disposed on the side of the rubber plate 400 away from the terminal block 100. The insulating plate 500 has a third mounting hole, through which the first end 210 passes.
[0098] The insulating plate 500 can be a single plate-like structure made of insulating material, and the insulating plate 500 is usually relatively rigid. The third mounting hole can be a through hole structure provided on the insulating plate 500 along the thickness direction of the insulating plate 500. The third mounting hole corresponds to the position of the first mounting hole 711, and the number of the third mounting holes also corresponds to the number of the first mounting holes 711. When the connecting rod 200 is inserted into the receiving cavity, the first end 210 passes through the third mounting hole.
[0099] With the above-described configuration, since the rubber plate 400 is relatively soft and the first end 210 needs to be securely connected to the nut 800, the insulating plate 500 increases the force on the nut 800, making the tightening process easier. Furthermore, during capacitor use, it reduces the probability of the nut 800 loosening due to unstable force, thus improving the capacitor's reliability. The insulating plate 500 also increases the creepage distance between the terminal rod 200 and the housing 700, thereby improving the capacitor's safety and reducing the probability of accidents during use or replacement.
[0100] like Figures 2 to 4 As shown, a limiting member 712 is provided on the side of the housing 700 facing the terminal block 100. The limiting member 712 is in contact with the groove wall of the mounting groove 110.
[0101] The limiting member 712 can be a limiting protrusion provided on the side of the top cover 710 facing the terminal block 100. The limiting member 712 can be provided on the top cover 710 by snap-fit or adhesive after the top cover 710 is formed, or the limiting member 712 can be integrally formed with the top cover 710 during the forming process.
[0102] The limiting member 712 can also be arranged in a ring around the edge of the first mounting hole 711. Since the diameter of the first mounting hole 711 is smaller than the diameter of the mounting groove 100, when the terminal block 100 is placed on the top cover 710, the mounting groove 110 can cover the first mounting hole 711. At this time, the limiting member 712 is in contact with the groove wall of the mounting groove 110.
[0103] In summary, the limiting member 712 can limit the position of the terminal block 100, reducing the possibility of relative displacement between the terminal block 100 and the housing 700, and improving the reliability of the terminal block 100. Furthermore, during the installation of the terminal block 100, the limiting member 712 can also guide the installation, reducing the difficulty of installation and improving the installation efficiency.
[0104] Figure 9 This is a schematic diagram of the terminal block provided in an embodiment of this application from another perspective. (See diagram below.) Figure 3 , Figure 5 as well as Figure 9 As shown, the terminal block 100 has a limiting groove 140 on the side away from the housing 700. The limiting groove 140 communicates with the second mounting hole 120, making the second mounting hole 120 step-shaped. The terminal rod 200 also includes a second end 220, which is opposite to the first end 210. The second end 220 is provided with a limiting block 221. The limiting block 221 abuts against the bottom of the limiting groove 140.
[0105] The limiting groove 140 can be a blind groove structure provided on the terminal block 100. The groove opening direction of the limiting groove 140 is opposite to the groove opening direction of the mounting groove 110. The limiting groove 140 can be set on the terminal block 100 by carving or grooving after the terminal block 100 is formed, or the limiting groove 140 can be integrally formed with the terminal block 100 during the forming process. One side of the groove wall of the limiting groove 140 communicates with the second mounting hole 120, and a stepped shape can be formed between the bottom of the limiting groove 140 and the wall of the second mounting hole 120.
[0106] The limiting block 221 can be a protrusion structure provided on the side wall of the connector 200. The limiting block 221 can be set on the connector 200 by means of snap-fit or adhesion after the connector 200 is formed, or the limiting block 221 can be integrally formed with the connector during the forming process. The limiting block 221 is also connected to the side of the pressure plate facing the terminal block 100. When the connector 200 is inserted into the second mounting hole 120, the limiting block 221 can enter into the limiting groove 140 and abut against the bottom of the limiting groove 140. At this time, the pressure plate abuts against the side of the terminal block 100 away from the top cover 710.
[0107] In summary, in the prior art, the terminal rod 200 is generally cylindrical, and the second mounting hole 120 is generally circular. When the terminal rod 200 is inserted into the second mounting hole 120, it is prone to rotation within the second mounting hole 120, which may lead to unstable capacitor wiring. The limiting block 221, however, can limit the position of the terminal rod 200, reducing the probability of rotation within the second mounting hole 120, thereby improving the reliability of the capacitor.
[0108] like Figure 1 , Figure 2 as well as Figure 5 As shown, the capacitor also includes an insulating cover 600, which covers the terminal block 100. The second end 220 is located inside the insulating cover 600.
[0109] The insulating cover 600 can be a cover structure installed on the top cover 710. The insulating cover 600 is usually made of insulating material. When the terminal rod 200 is inserted into the terminal block 100, the insulating cover 600 can cover the terminal block 100 and the second end 220 of the terminal rod 200. The insulating cover 600 may also have a hollow part so that external wires can extend into the interior of the insulating cover 600 and make electrical connection with the second end 220.
[0110] In summary, the insulating cover 600 is installed over the terminal block 100, and the second end 220 is located inside the insulating cover 600. This reduces the probability of electric shock caused by operators accidentally touching the second end 220 of the terminal rod 200 during the use or replacement of the capacitor, thus improving the safety of the capacitor during use or replacement.
Claims
1. A capacitor characterized by, The utility model relates to a shell is provided with first mounting hole, wiring holder is located on the shell, wiring holder is provided with installation groove and second mounting hole, the mouth of installation groove is towards the shell, second mounting hole communicates with installation groove, the groove bottom of installation groove is equipped with isolation structure, second mounting hole is opposite with first mounting hole position, the aperture of first mounting hole is bigger than the aperture of second mounting hole, wiring rod includes first end, first end passes through first mounting hole and second mounting hole and enters to the inside of shell, isolation structure is located between first end and the hole wall of first mounting hole. The isolation structure is a groove provided on the groove bottom of the installation groove; The groove forms a ring around the second mounting hole. The isolation structure is a plurality of protruding structures provided on the groove bottom of the installation groove; 2. The capacitor of claim 1, wherein The plurality of protruding structures are sequentially connected and arranged around the edge of the second mounting hole. It further includes a rubber ring, the rubber ring is sleeved on the first end.
3. The capacitor of claim 1, wherein The wiring rod has a plurality of, the first end of the plurality of wiring rods is sleeved with a rubber ring; The plurality of rubber rings are connected by a rubber plate on the side away from the wiring holder, so that the plurality of rubber rings form a whole.
4. The capacitor of claim 1, wherein It further includes an insulating plate, the insulating plate is arranged on the side of the rubber plate away from the wiring holder; 5. The capacitor of claim 4, wherein The first end passes through the third mounting hole. The aperture of the first mounting hole is smaller than the groove diameter of the installation groove, and the side of the shell towards the wiring holder is provided with a limiting piece; 6. The capacitor of claim 5, wherein The limiting piece is in contact with the groove wall of the installation groove. The side of the wiring holder away from the shell is provided with a limiting groove, the limiting groove communicates with the second mounting hole, so that the second mounting hole forms a stepped shape; 7. The capacitor of claim 1, wherein The wiring rod further includes a second end, the second end is opposite to the first end, and the second end is provided with a limiting block; The limiting block is in contact with the groove bottom of the limiting groove.
8. The capacitor of any one of claims 1-7, wherein, It further includes an insulating cover, the insulating cover covers the wiring holder; The second end is located in the insulating cover. It further includes a capacitor element; 9. The capacitor of claim 8, wherein The shell has a containing cavity, and the capacitor element is located in the containing cavity; The wiring rod is electrically connected with the capacitor element.
10. The capacitor of claim 1, wherein