Split type moving contact structure and dual-power change-over switch
By dividing the moving contact rod into upper and lower parts and increasing the cross-sectional area, the split design solves the problems of high current requirements and complex processing in the existing technology, and realizes a dual power supply switching switch with high stability and compact design.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG BSB ELECTRICAL APPLIANCES CO LTD
- Filing Date
- 2025-05-31
- Publication Date
- 2026-05-08
AI Technical Summary
In existing dual-power transfer switches, the integrated structure of the moving contact rod is difficult to meet the high current requirements, resulting in local temperature rise and increased contact resistance, which affects stability and lifespan. At the same time, the manufacturing process is complex and costly, and it is not suitable for compact designs.
The movable contact structure is split into upper and lower parts, which form an upper arc plate and a lower arc plate respectively. This increases the cross-sectional area and shunts the current, simplifies the manufacturing process, and the rotating mechanism is located inside, saving space.
It improves current carrying capacity, reduces processing difficulty and cost, adapts to compact switch designs, and enhances stability and mechanical strength.
Smart Images
Figure CN224217371U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of power switch technology, and in particular to a split moving contact structure and a dual power supply switching switch. Background Technology
[0002] In dual-power transfer switches, the moving contact is the core component that carries and switches the main circuit current. In existing technologies, the moving contact rod is mostly an integral structure, and its cross-sectional area is limited by the manufacturing process, making it difficult to meet the requirements of high current. Especially during long-term high-load operation, the current concentration can easily lead to excessive local temperature rise, which will aggravate the increase in contact resistance and affect the stability and lifespan of the switch.
[0003] In addition, due to the large thickness of the copper material, the stamping and forming process of the large cross-sectional area copper material is complicated, requiring the use of high-precision molds, and the material waste rate is high, resulting in difficult processing and high cost.
[0004] Furthermore, the integrated structure requires a large internal space to accommodate the rotating mechanism, resulting in a bulky overall size of the switch that is difficult to fit into a compact switch design. Summary of the Invention
[0005] To address the aforementioned problems, the first objective of this utility model is to provide a split-type moving contact structure. By designing the moving contact rod into upper and lower parts, the cross-sectional area of the moving contact rod is increased, current shunting is achieved, and the processing difficulty of the moving contact rod is reduced. The central ring design saves internal space and is suitable for compact switch layouts. The second objective of this utility model is to provide a dual-power switching switch with the aforementioned split-type moving contact structure.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A split-type moving contact structure, characterized in that: it includes a moving contact rod, which comprises an upper moving contact rod and a lower moving contact rod that are fixed together; the upper moving contact rod includes an upper arc plate, an upper connecting plate, and an upper mounting plate, the upper arc plate being arranged to arch upwards, two upper connecting plates being formed on both sides of the upper arc plate, and two upper mounting plates being formed on the outer ends of the two upper connecting plates respectively; the lower moving contact rod includes a lower arc plate, a lower connecting plate, and a lower mounting plate, the lower arc plate being arranged to be recessed downwards, two lower connecting plates being formed on both sides of the lower arc plate, and two lower mounting plates being formed on the outer ends of the two lower connecting plates respectively;
[0008] The upper and lower arc plates are arranged opposite each other and joined together to form a ring, and a connecting hole for connecting with the rotating mechanism is formed inside the ring; the upper and lower connecting plates, the upper and lower assembly plates are all attached to each other, and the upper moving contacts are welded to the upper ends of the upper assembly plates on both sides, and the lower moving contacts are welded to the lower ends of the lower assembly plates on both sides.
[0009] Preferably, the front and rear sides of the upper and lower arc plates extend beyond the sides of the upper and lower connecting plates, respectively.
[0010] Preferably, the upper connecting plate and the lower connecting plate are provided with a plurality of rivet holes, and rivets are inserted into the rivet holes to rivet the upper moving contact rod and the lower moving contact rod together.
[0011] Preferably, the upper connecting plates on both sides and the lower connecting plates on both sides are symmetrically arranged on both sides of the upper arc plate and the lower arc plate, respectively.
[0012] Preferably, the upper mounting plates on both sides are symmetrically arranged and bent upward to form upper obtuse angle plates, and the lower mounting plates on both sides are symmetrically arranged and bent upward to form lower obtuse angle plates.
[0013] Preferably, the upper arc plate, the upper connecting plate, and the upper assembly plate, as well as the lower arc plate, the lower connecting plate, and the lower assembly plate, are integrally formed.
[0014] Preferably, the lower end of the upper arc plate and the upper connecting plate, and the upper end of the lower arc plate and the lower connecting plate are respectively connected by arcs.
[0015] A dual power supply switching switch is characterized in that it includes a split moving contact structure as described in any one of the above, and further includes a rotating mechanism. The rotating mechanism includes a rotor mounted on a connecting hole, and the upper and lower ends of the rotor are formed with fan-shaped blocks. The upper and lower arc plates are respectively constructed with fan-shaped holes that cooperate with the fan-shaped blocks.
[0016] Preferably, the rotating mechanism further includes clamping seats disposed on both sides of the rotor, the clamping seats being clamped and installed on the outer sides of the upper connecting plate and the lower connecting plate, and the clamping seats being riveted to the upper connecting plate and the lower connecting plate.
[0017] The present invention adopts the above technical solution and has the following beneficial effects:
[0018] ① The moving contact rod is divided into an upper moving contact rod and a lower moving contact rod, with the total current split 50% between the upper and lower moving contact rods, thereby improving the current carrying capacity;
[0019] ② An upper arc plate and a lower arc plate are formed on the upper moving contact rod and the lower moving contact rod respectively, which increases the overall cross-sectional area of the moving contact rod and improves the current carrying capacity;
[0020] ③ The upper moving contact rod and the lower moving contact rod are processed separately, which simplifies the processing technology, reduces the dependence on the thickness of the copper material, and makes processing more convenient;
[0021] ④ The upper and lower arc plates work together to form a ring that connects with the rotating mechanism, so that the rotating mechanism is located inside the moving contact rod, saving internal space of the switch and adapting to a compact switch layout;
[0022] ⑤ The upper moving contact rod, the lower moving contact rod, and the clamping seat are riveted together to ensure mechanical strength and improve stability. Attached Figure Description
[0023] Figure 1 This is a three-dimensional structural diagram of a split-type moving contact structure.
[0024] Figure 2 This is a three-dimensional structural diagram of the upper moving contact rod.
[0025] Figure 3 This is a three-dimensional structural diagram of the lower moving contact rod.
[0026] Figure 4 This is a schematic diagram showing the cooperation between the split-type moving contact structure and the rotating mechanism. Detailed Implementation
[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.
[0028] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.
[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.
[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 mechanical connection or an electrical 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 utility model according to the specific circumstances.
[0031] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. Example 1:
[0032] like Figures 1-3 The diagram shows a split-type moving contact structure, including a moving contact rod, which comprises an upper moving contact rod 1 and a lower moving contact rod 2 that are fixed together. The upper moving contact rod 1 includes an upper arc plate 3, an upper connecting plate 4, and an upper mounting plate 5. The upper arc plate 3 is arranged to arch upwards. There are two upper connecting plates 4 formed on both sides of the upper arc plate 3. There are two upper mounting plates 5, each formed on the outer end of the upper connecting plates 4 on both sides. The lower moving contact rod 2 includes a lower arc plate 6, a lower connecting plate 7, and a lower mounting plate 8. The lower arc plate 6 is arranged to be recessed downwards. There are two lower connecting plates 7 formed on both sides of the lower arc plate 6. There are two lower mounting plates 8, each formed on the outer end of the lower connecting plates 7 on both sides.
[0033] The upper arc plate 3 and the lower arc plate 6 are arranged opposite each other and joined together to form a ring. A connecting hole 9 for connecting with the rotating mechanism is formed inside the ring. The upper connecting plate 4 and the lower connecting plate 7, the upper assembly plate 5 and the lower assembly plate 8 are all attached to each other. The upper moving contact 10 is welded to the upper end of the upper assembly plate 5 on both sides, and the lower moving contact 11 is welded to the lower end of the lower assembly plate 8 on both sides.
[0034] In the above technical solution, the moving contact rod includes an upper moving contact rod and a lower moving contact rod that are fixed together. The middle part of the upper moving contact rod is configured as an upwardly arched upper arc plate, and the middle part of the lower moving contact rod is configured as a downwardly recessed lower arc plate. The overall cross-sectional area of the moving contact rod is increased, and the upper and lower moving contact rods achieve current splitting (each bearing 50% of the total current), reducing the current-carrying pressure of a single moving contact rod and improving the current-carrying capacity. Furthermore, the upper and lower moving contact rods are processed separately, which simplifies the processing technology, reduces the dependence on the thickness of the copper material, and makes processing more convenient. The central annular hole formed by the splicing inside the moving contact rod facilitates precise connection with the rotating mechanism and saves internal space.
[0035] In use, the split-type moving contact rod rotates with the rotating mechanism. The upper moving contact on one side contacts the power stationary contact, and the lower moving contact, which is arranged diagonally, contacts the output stationary contact. The double-contact welding design improves switching reliability.
[0036] Furthermore, the front and rear sides of the upper arc plate 3 and the lower arc plate 6 extend beyond the sides of the upper connecting plate 4 and the lower connecting plate 7, respectively. In this technical solution, the front and rear sides of the upper and lower arc plates extend beyond the connecting plates, further increasing the cross-sectional area and improving the current carrying capacity; at the same time, the extended parts can provide additional support or limiting functions, improving stability.
[0037] Furthermore, the upper connecting plate 4 and the lower connecting plate 7 are respectively provided with a plurality of rivet holes 12, and rivets are inserted into the rivet holes 12 to rivet the upper moving contact rod 1 and the lower moving contact rod 2 together. In this technical solution, the mechanical connection of the upper and lower moving contact rods is achieved through rivet holes and rivets, ensuring a tight fit of the split structure and avoiding loosening due to vibration or temperature rise; the riveting method is simple to process, low in cost, and can replace welding to reduce the risk of thermal deformation.
[0038] Furthermore, the upper connecting plates 4 and the lower connecting plates 7 are symmetrically arranged on both sides of the upper arc plate 3 and the lower arc plate 6, respectively. In this technical solution, the symmetrically arranged connecting plates ensure uniform current distribution and reduce local temperature rise; at the same time, the symmetrical structure balances mechanical stress and prevents structural deformation or fatigue fracture caused by uneven force on one side.
[0039] Furthermore, the upper mounting plates 5 on both sides are symmetrically arranged and bent upwards to form upper obtuse-angle plates, and the lower mounting plates 8 on both sides are symmetrically arranged and bent upwards to form lower obtuse-angle plates. In this technical solution, the obtuse-angle plates formed by bending the upper and lower mounting plates facilitate contact between the moving and stationary contacts, while the obtuse-angle plates have higher bending stiffness, which can effectively resist mechanical impact or vibration during the switching of moving contacts and prevent deformation of the mounting plates; the bending angle of the obtuse-angle plates can avoid interference with other components and optimize space utilization.
[0040] Furthermore, the upper arc plate 3, the upper connecting plate 4, and the upper assembly plate 5, as well as the lower arc plate 6, the lower connecting plate 7, and the lower assembly plate 8, are all integrally formed. In this technical solution, the upper and lower moving contact rods are integrally formed, reducing connection points, lowering contact resistance and the probability of failure; the integral forming process (such as stamping) improves production efficiency and ensures the geometric accuracy of the parts, adapting to the assembly requirements of the rotating mechanism.
[0041] Furthermore, the lower end of the upper arc plate 3 and the upper connecting plate 4, as well as the upper end of the lower arc plate 6 and the lower connecting plate 7, are respectively connected by arc transitions. In this technical solution, the arc transition design between the arc plate and the connecting plate eliminates stress concentration at right angles or acute angles, improving fatigue resistance; the smooth transition can also optimize the current path and reduce eddy current losses. Example 2:
[0042] like Figure 4 The illustrated dual-power switching switch includes a split-type moving contact structure as shown in Embodiment 1, and further includes a rotating mechanism. The rotating mechanism includes a rotor 13 mounted on a connecting hole 9. The upper and lower ends of the rotor 13 are formed with sector-shaped blocks 14. The upper arc plate 3 and lower arc plate 6 are respectively constructed with sector-shaped holes 15 that mate with the sector-shaped blocks 14. In this technical solution, the matching design of the sector-shaped blocks and sector-shaped holes prevents the rotor from disengaging from the moving contact rod.
[0043] Furthermore, the rotating mechanism also includes clamping seats 16 disposed on both sides of the rotor 13. The clamping seats 16 are clamped and installed on the outer sides of the upper connecting plate 4 and the lower connecting plate 7, and are riveted to the upper connecting plate 4 and the lower connecting plate 7. In this technical solution, the clamping seats are fixed to the outer sides of the upper and lower connecting plates by riveting, which enhances the integrity of the rotating mechanism and the moving contact rod and avoids loosening of the connection due to frequent switching.
[0044] In this specific embodiment, addressing the issues of low current carrying capacity, difficult processing, and low space utilization of the integrated moving contact in existing dual-power transfer switches, the above solution divides the moving contact rod into an upper moving contact rod and a lower moving contact rod. An upper arc plate and a lower arc plate are formed on the upper and lower moving contact rods, respectively. This increases the overall cross-sectional area of the moving contact rod and diverts the total current 50% to each of the upper and lower moving contact rods, thus improving the current carrying capacity. The separate processing of the upper and lower moving contact rods simplifies the manufacturing process, reduces dependence on copper thickness, and makes processing more convenient. The upper and lower arc plates cooperate to form a ring connected to the rotating mechanism, allowing the rotating mechanism to be located inside the moving contact rod, saving internal switch space and adapting to compact switch layouts.
[0045] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0046] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.
Claims
1. A split-type moving contact structure, characterized in that: The device includes a movable contact rod, which comprises an upper movable contact rod (1) and a lower movable contact rod (2) that are fixed together. The upper movable contact rod (1) comprises an upper arc plate (3), an upper connecting plate (4), and an upper mounting plate (5). The upper arc plate (3) is arranged to arch upwards. There are two upper connecting plates (4) formed on both sides of the upper arc plate (3). There are two upper mounting plates (5) formed on the outer ends of the upper connecting plates (4) on both sides respectively. The lower movable contact rod (2) comprises a lower arc plate (6), a lower connecting plate (7), and a lower mounting plate (8). The lower arc plate (6) is arranged to be recessed downwards. There are two lower connecting plates (7) formed on both sides of the lower arc plate (6). There are two lower mounting plates (8) formed on the outer ends of the lower connecting plates (7) on both sides respectively. The upper arc plate (3) and the lower arc plate (6) are arranged opposite to each other and joined together to form a ring. A connecting hole (9) for connecting with the rotating mechanism is formed in the ring. The upper connecting plate (4) and the lower connecting plate (7), the upper assembly plate (5) and the lower assembly plate (8) are all attached to each other. The upper moving contact (10) is welded to the upper end of the upper assembly plate (5) on both sides, and the lower moving contact (11) is welded to the lower end of the lower assembly plate (8) on both sides.
2. The split-type moving contact structure according to claim 1, characterized in that: The front and rear sides of the upper arc plate (3) and the lower arc plate (6) extend out from the sides of the upper connecting plate (4) and the lower connecting plate (7), respectively.
3. The split-type moving contact structure according to claim 1, characterized in that: The upper connecting plate (4) and the lower connecting plate (7) are provided with a plurality of rivet holes (12), and rivets are inserted into the rivet holes (12) to rivet the upper moving contact rod (1) and the lower moving contact rod (2) together.
4. The split-type moving contact structure according to claim 3, characterized in that: The upper connecting plates (4) and the lower connecting plates (7) on both sides are symmetrically arranged on both sides of the upper arc plate (3) and the lower arc plate (6).
5. A split-type moving contact structure according to claim 4, characterized in that: The upper mounting plates (5) on both sides are symmetrically arranged and bent upward to form upper obtuse angle plates, and the lower mounting plates (8) on both sides are symmetrically arranged and bent upward to form lower obtuse angle plates.
6. A split-type moving contact structure according to claim 1, characterized in that: The upper arc plate (3), upper connecting plate (4), and upper assembly plate (5), as well as the lower arc plate (6), lower connecting plate (7), and lower assembly plate (8), are integrally formed.
7. A split-type moving contact structure according to claim 6, characterized in that: The lower end of the upper arc plate (3) and the upper connecting plate (4), and the upper end of the lower arc plate (6) and the lower connecting plate (7) are respectively connected by arcs.
8. A dual-power transfer switch, characterized in that: The invention includes a split-type moving contact structure as described in any one of claims 1 to 7, and further includes a rotating mechanism. The rotating mechanism includes a rotor (13) mounted on a connecting hole (9). The upper and lower ends of the rotor (13) are formed with fan-shaped blocks (14). The upper arc plate (3) and the lower arc plate (6) are respectively provided with fan-shaped holes (15) that cooperate with the fan-shaped blocks (14).
9. A dual power supply switching switch according to claim 8, characterized in that: The rotating mechanism also includes clamping seats (16) disposed on both sides of the rotor (13). The clamping seats (16) are clamped and installed on the outside of the upper connecting plate (4) and the lower connecting plate (7). The clamping seats (16) are riveted to the upper connecting plate (4) and the lower connecting plate (7).