Moving contact mechanism and dual-power change-over switch
Through the integrated molding of the contact seat lower case and the elastic part installation design, the complex assembly of the dynamic contact assembly in the existing dual power switch is solved, and the stable contact and reliable closing of the dynamic contacts and the static contacts are achieved, which improves the electrical performance and service life of the switch.
Patent Information
- Application Number
- CN202422065123.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-26
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-08-26
AI Technical Summary
In existing dual power switches, the assembly of the dynamic contact assembly is complicated, and the assembly of parts leads to poor consistency, and the dynamic contacts and static contacts cannot contact in parallel, which affects electrical performance and increases mold cost and low assembly efficiency.
The contact seat lower shell is integrated with the design of the integrated molding of the contact seat lower shell, and the movable contact assembly is directly installed on the feature boss of the contact seat lower shell through elastic parts. Combined with the limit groove and support structure, it ensures parallel contacts and stable closings between the movable contacts and the static contacts, reducing the risk of jumping and arcing.
The stable contact between the moving contact and the static contact is achieved, which reduces assembly complexity, improves part consistency and assembly efficiency, reduces the risk of ablation of arc contacts, and enhances the reliability of the switch.
Smart Images
Figure CN223273137U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of contactors, in particular to a moving contact mechanism and a dual power supply conversion switch. Background Art
[0002] In existing dual-power switches, the moving contact assembly consists of a first moving contact and a second moving contact at each end. When the contact holder of the dual-power switch rotates clockwise or counterclockwise, driven by a shaft, it connects with the first stationary contact to conduct the first power source, or with the second stationary contact to conduct the second power source, respectively, to switch between the standby power sources. Existing dual-power switches have two independent springs connected together, one for each side, to provide the final pressure when the moving and static contacts make contact. To facilitate the assembly of the four independent springs, a hooking mechanism is required within the inner wall of the contact support, making the production process of the contact support overly complex. Assembly also requires coordination of multiple parts, resulting in low assembly efficiency and a unique shape, increased mold costs, and increased instability.
[0003] Therefore, the present invention needs to provide a contact mounting base that is integrally formed, does not require assembly, has good parts consistency, and has better positioning and support effects on the moving contact assembly, thereby avoiding the moving contact being unable to make parallel contact with the static contact due to the assembly of parts, resulting in a moving contact mechanism with reduced electrical performance. Utility Model Content
[0004] The purpose of the present utility model is to provide a moving contact mechanism to solve the above-mentioned problems existing in the prior art.
[0005] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:
[0006] A moving contact mechanism includes a contact base lower shell, wherein the interior of the contact base lower shell has a cavity and the contact base lower shell is formed in one piece.
[0007] A moving contact assembly and an elastic assembly, wherein the moving contact assembly is installed at the lower part of the contact base lower shell, and the elastic assembly includes a first elastic member and a second elastic member, wherein the first elastic member and the second elastic member are respectively located on both sides of the moving contact assembly, and one end of the first elastic member and the second elastic member are connected to the moving contact assembly, and the other end of the first elastic member and the second elastic member are connected to the contact base lower shell.
[0008] Furthermore, the contact base lower shell includes a movable contact base lower shell body, and a groove is further provided at the lower end of the contact base lower shell body. The groove is concave toward the center of the contact base lower shell, and the groove is used to install the movable contact assembly.
[0009] Furthermore, a fixed shaft is provided on the upper portion of the contact base lower shell, and the fixed shaft is used to fix the first elastic member and the second elastic member. A limiting ring is also provided on the inner surface of the contact base lower shell, and the limiting ring is used to fix the moving contact assembly.
[0010] Furthermore, the first elastic member and the second elastic member each include a first spring body and a second spring body, the lower ends of the first spring body and the second spring are connected to each other, the upper ends of the first spring body and the second spring body are also provided with an extension rod, the upper end of the extension rod is also provided with a hook, and the hook is used to fix the shaft connection.
[0011] Furthermore, the moving contact assembly includes a connecting portion, and a first straight arm and a second straight arm are provided at both ends of the connecting portion. Moving silver points are also provided on the first straight arm and the second straight arm.
[0012] Furthermore, the connecting portion is a U-shaped structure, and an extension piece is provided at the lower end of the connecting portion. The extension piece is provided with a recess, and the recess is used for welding a flexible connection.
[0013] Furthermore, limiting grooves are provided on both sides of the lower shell of the contact base, and the limiting grooves are used to limit the moving contact assembly.
[0014] Furthermore, it also includes a first contact air blowing member and a second contact air blowing member, wherein the first contact air blowing member and the second contact air blowing member are respectively located on the first straight arm and the second straight arm close to the moving silver point.
[0015] Furthermore, an upper shell is provided on the upper portion of the contact base lower shell, and the upper shell is fixed to the contact base lower shell by fixing bolts.
[0016] The utility model also includes a dual power supply transfer switch, which includes the above-mentioned moving contact mechanism.
[0017] The utility model also provides a contactor, comprising the above-mentioned contactor quick wiring structure.
[0018] The beneficial effects of the utility model are:
[0019] Since the lower shell of the contact seat is made of one-piece molding, it does not need to be assembled, the parts are consistent, and the positioning and support effects of the moving contact are better, avoiding the inability of the moving contact to make parallel contact with the static contact due to the assembly of parts. In addition, the moving contact body is directly installed on the characteristic boss of the lower shell of the contact seat through a tension spring. The assembly is easy and the structure is simple. At the same time, fewer parts are involved, which reduces the complexity of assembly. The contact is freely limited through the middle groove of the contact and the support contact with the lower shell of the contact seat and both sides. When closing, the support point of the contact seat on the other side is used as the fulcrum. After the moving and static contacts come into contact, radial sliding will occur. This action reduces the bounce of the contact, makes its closing action more stable and reliable, and reduces the risk of arcing contact ablation. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is an exploded view of the contact mechanism of the utility model;
[0021] Figure 2 This is a schematic structural diagram of the movable contact assembly of the utility model;
[0022] Figure 3 This is a schematic diagram of the elastic member structure of the utility model;
[0023] Figure 4 This is a schematic diagram of the lower shell of the contact seat of the utility model;
[0024] Figure 5 This is a schematic diagram of the lower shell of the contact seat of the utility model;
[0025] Figure 6 This is a schematic diagram of the double-open position of the contacts;
[0026] Figure 7 This is a schematic diagram of the contact closing position.
[0027] Reference numerals:
[0028] Contact base lower shell 1, contact base upper shell 2, moving contact assembly 3, moving silver points 4, 4', first contact air blowing member 5, second contact air blowing member 5', first elastic member 6, second elastic member 6';
[0029] Support bosses 1-1, 1-2, contact limiting features 1-3, fixed shafts 1-4, 1-5;
[0030] The moving contact assembly 3 includes: a concave surface 3-1, elastic member fixing points 3-2 and 3-3, and a flexible connection welding point 3-4;
[0031] Support boss contact surfaces 5-1, 5-1′;
[0032] Hook parts 6-1, 6-1', connecting parts 6-2, 6-2'. DETAILED DESCRIPTION
[0033] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0034] Among them, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.
[0035] 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 the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.
[0036] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.
[0037] In addition, numerous specific details are provided in the detailed description below to better illustrate the present application. Those skilled in the art will appreciate that the present application can be practiced without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art are not described in detail in order to highlight the main purpose of the present application.
[0038] like Figures 1 to 7 As shown, a moving contact mechanism includes a contact base lower shell 1, wherein the interior of the contact base lower shell 1 has a cavity and the contact base lower shell is formed in one piece.
[0039] The moving contact assembly 3 and the elastic assembly are installed in the lower part of the contact base lower shell. The elastic assembly includes a first elastic member 6 and a second elastic member 6′. The first elastic member 6 and the second elastic member 6′ are respectively located on both sides of the moving contact assembly, and one end of the first elastic member 6 and the second elastic member 6′ is connected to the moving contact assembly 3, and the other end of the first elastic member 6 and the second elastic member 6′ is connected to the contact base lower shell 1.
[0040] Through the above method, it can be known that, since the contact base lower shell 1 of the utility model is made in an integral molding manner, no assembly is required, the parts have good consistency, and the positioning and support effects on the moving contact assembly are better, avoiding the moving contact from being unable to contact parallel to the static contact due to the assembly of parts. In addition, the moving contact assembly is directly installed on the characteristic boss of the contact base lower shell through an elastic member, which is easy to assemble and has a simple structure. At the same time, it involves fewer parts, which reduces the complexity of assembly; through the middle groove of the contact and the support contact with the contact base lower shell and both sides, there is more free limitation, so that when closing, the support point of the contact base on the other side is used as the fulcrum, and radial sliding will occur after the moving and static contacts come into contact. This action reduces the bounce of the contact, makes its closing action more stable and reliable, and reduces the risk of arcing contact ablation.
[0041] In addition, it is worth noting that the contact base lower shell includes a movable contact base lower shell body, and the lower end of the contact base lower shell body is also provided with a groove, and the groove is concave toward the center of the contact base lower shell, and the movable contact assembly is installed in the groove. The contact base lower shell is rotated counterclockwise by the square shaft, and the square shaft moves counterclockwise at the same time. After the moving and static contacts come into contact, the support boss contact surface 5-1' of the first contact air blowing member starts to swing with the contact base lower shell support boss 1-1 as the fulcrum, and the concave surface 3-1 of the connecting part of the movable contact assembly is in contact with the contact. The contact limiting features 1-3 of the lower shell 1 of the seat are coordinated (through the middle groove of the contact and the contact seat lower shell and the support contacts on both sides, multiple free limits are achieved, so that the support point of the contact seat on the other side is used as the fulcrum when closing, and radial sliding will occur after the moving and static contacts come into contact. This action reduces the bounce of the contact, makes its closing action more stable and reliable, and reduces the risk of arcing contact erosion). As the square shaft angle is rotated into place and the closing is completed, the contact surface 5-1 of the second contact air blow piece boss and the support boss 1-2 of the lower shell 1 of the contact seat are separated to the maximum position. At this time, the elastic part is stretched to the maximum state to provide final pressure to the contact.
[0042] In order to fix the first elastic member and the second elastic member on the contact base lower shell, specifically, in this embodiment, the upper part of the contact base lower shell is also provided with a fixed shaft, and the fixed shaft is connected to the upper part of the contact base lower shell through an integral molding manner, and the two ends of the fixed shaft are respectively fixed on the inner surfaces of both sides of the contact base lower shell, and the fixed shaft is used to fix the first elastic member and the second elastic member. A limiting ring is also provided on the inner surface of the contact base lower shell, and the limiting ring is used to fix the moving contact assembly.
[0043] Specifically, the first elastic member 6 and the second elastic member 6' each include a first spring body and a second spring body, the lower ends of the first spring body and the second spring are connected to each other to form connecting portions 6-2 and 6-2', the upper ends of the first spring body and the second spring body are further provided with an extension rod, the upper ends of the extension rod are further provided with a hook, the hook is used to fix the shaft connection, and the first elastic member and the second elastic member provide final pressure to the moving contact assembly when the switch is opened or closed;
[0044] The lower ends of the first spring body and the second spring body are fixed to the moving contacts 3-2 and 3-3 through the connecting parts 6-2 and 6-2'; the hook parts 6-1 and 6-1' are fixed to the elastic part connecting bosses 1-4 and 1-5 of the lower shell 1 of the contact seat; after the elastic part is fixed, the contact air blowing parts 5 and 5' support boss contact surfaces 5-1 and 5-1' are in contact with the support bosses 1-1 and 1-2 of the lower shell 1 of the contact seat.
[0045] In addition, in this embodiment, the moving contact assembly 3 includes a connecting portion, and a first straight arm and a second straight arm are provided at both ends of the connecting portion. The first straight arm and the connecting portion, and the connecting portion and the second straight arm are formed into one piece with each other to avoid deformation or breakage of the moving contact assembly due to force, thereby extending the service life. In addition, moving silver points 4 and 4' are provided on the first straight arm and the second straight arm, and the moving silver points 4 and 4' are fixed to the upper surfaces of the first straight arm and the second straight arm by welding.
[0046] In addition, it should be noted that the connecting portion is a U-shaped structure, and an extension piece is provided at the lower end of the connecting portion. The extension piece is provided with a recess, and the recess is used for welding the flexible connection. The provision of the recess facilitates the welding of the flexible connection.
[0047] In order to prevent the moving contact assembly from swinging left and right when the mechanism is opened and closed, limiting grooves are provided on both sides of the lower shell of the contact seat. Therefore, the moving contact assembly is limited by the provided limiting grooves.
[0048] In addition, it is worth mentioning that it also includes a first contact air blowing member 5 and a second contact air blowing member 5′. The first contact air blowing member 5 and the second contact air blowing member 5′ are respectively located on the first straight arm and the second straight arm on the side close to the moving silver point 4, 4′. The first contact air blowing member 5 and the second contact air blowing member 5′ will generate insulating gas under the action of the surrounding high temperature and high pressure environment, blowing the arc into the arc extinguishing cavity, and the arc extinguishing grid will cut the arc entering the arc extinguishing cavity, thereby reducing the voltage and extinguishing the arc.
[0049] In order to prevent the arc from flying out from the upper end of the contact base lower shell 1, an upper shell 2 is further provided on the upper part of the contact base lower shell 1. The upper shell 2 is fixed to the contact base lower shell 1 by fixing bolts. In this embodiment, the upper shell 2 is set to an arc shape. During installation, it is buckled on the upper end of the contact base lower shell 1 and firmly fixed with bolts.
[0050] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be considered within the scope of protection of the present invention.
Claims
1. A moving contact mechanism, characterized in that: The contact base lower shell comprises a cavity inside the contact base lower shell and is formed in one piece. A moving contact assembly and an elastic assembly, wherein the moving contact assembly is installed at the lower part of the contact base lower shell, and the elastic assembly includes a first elastic member and a second elastic member, wherein the first elastic member and the second elastic member are respectively located on both sides of the moving contact assembly, and one end of the first elastic member and the second elastic member are connected to the moving contact assembly, and the other end of the first elastic member and the second elastic member are connected to the contact base lower shell.
2. The moving contact mechanism according to claim 1, characterized in that: The contact base lower shell includes a movable contact base lower shell body. A groove is further provided at the lower end of the contact base lower shell body. The groove is concave toward the center of the contact base lower shell and is used to install the movable contact assembly.
3. The moving contact mechanism according to claim 2, characterized in that: A fixed shaft is further provided on the upper portion of the contact base lower shell, and the fixed shaft is used to fix the first elastic member and the second elastic member. A limiting ring is further provided on the inner surface of the contact base lower shell, and the limiting ring is used to fix the moving contact assembly.
4. The moving contact mechanism according to claim 3, characterized in that: The first elastic member and the second elastic member each include a first spring body and a second spring body, the lower ends of the first spring body and the second spring are connected to each other, the upper ends of the first spring body and the second spring body are also provided with an extension rod, the upper end of the extension rod is also provided with a hook, and the hook is used to fix the shaft connection.
5. The moving contact mechanism according to claim 1, characterized in that: The moving contact assembly includes a connecting portion, and a first straight arm and a second straight arm are provided at both ends of the connecting portion. The first straight arm and the second straight arm are also provided with moving silver points.
6. The moving contact mechanism according to claim 5, characterized in that: The connecting portion is a U-shaped structure, and an extension piece is provided at the lower end of the connecting portion. A recess is provided on the extension piece, and the recess is used for welding a flexible connection.
7. The moving contact mechanism according to claim 1, characterized in that: Limiting grooves are further provided on both sides of the lower shell of the contact seat, and the limiting grooves are used to limit the moving contact assembly.
8. The moving contact mechanism according to claim 7, characterized in that: An upper shell is further provided on the upper portion of the contact base lower shell, and the upper shell is fixed to the contact base lower shell by fixing bolts.
9. The moving contact mechanism according to claim 5, characterized in that: It also includes a first contact air blowing member and a second contact air blowing member, wherein the first contact air blowing member and the second contact air blowing member are respectively located on the first straight arm and the second straight arm close to the moving silver point.
10. A dual power transfer switch, characterized in that: Comprising a moving contact mechanism, the dual power conversion switch is the same as the moving contact mechanism described in any one of claims 1 to 9.