Contact module structure of switch
By introducing a limiting clamping boss structure into the contact module, the problem of incomplete opening caused by the rebound of the moving contact is solved, which effectively dissipates the electric arc and reduces wear, thereby improving the service life and reliability of the disconnecting switch.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2026-03-24
AI Technical Summary
In existing disconnect switches with large-angle contact modules, the moving contact rebounds after hitting the wall, causing the circuit breaker to fail to open properly, which affects product performance and service life.
The structure of the limiting clamping boss is adopted to restrict the movement of the moving contact group, ensuring that the moving contact can slowly reach the final opening position and guide the arc to dissipate along the designed route.
This reduces wear between the moving and stationary contacts, extends the product's service life, and improves the reliability and safety of the tripping mechanism.
Smart Images
Figure CN121726262A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of low-voltage electrical appliance technology, specifically relating to a contact module structure for a switch. Background Technology
[0002] As a switching device, a disconnecting switch is mainly used for "isolating power supplies, switching operations, and connecting and disconnecting small current circuits". When the disconnecting switch is in the open position, there is an insulation distance between the contacts that meets the specified requirements and a clear disconnection mark; when the disconnecting switch is in the closed position, it is a switching device that can carry the current under normal circuit conditions and the current under abnormal conditions (such as short circuit) within a specified time.
[0003] With the improvement of product performance indicators, taking DC operating environments as an example, the rated operating voltage has increased to DC 1500V, and the performance requirements for products are becoming increasingly higher. When the existing disconnector operating mechanism completes the rotation, it also drives the rotating shaft in the conductive module to rotate, and relies on the inertia of the force transmitted by the operating mechanism to complete the subsequent rotation to achieve a 100° opening angle for the moving contact. However, in the existing technology, due to the inertia of excessive operating force, the moving contact is prone to rebound after touching the wall, thus failing to reach the preset large opening angle (100°), resulting in incomplete tripping. Summary of the Invention
[0004] The purpose of this invention is to address the defect in existing large-angle contact modules where the moving contact rebounds after contacting the wall, leading to incomplete tripping. This invention provides a contact module structure for a switch where a limiting clamping boss blocks the arc escaping between the moving and stationary contacts, allowing the arc to elongate, thin, and dissipate along a designed path. The limiting clamping boss also forces the moving contact assembly inward, stopping its movement, reducing wear on the housing, and extending the product's service life.
[0005] Technical solution
[0006] To achieve the above-mentioned technical objectives, the present invention provides a contact module structure for a switch, which includes a moving contact. During the rotation of the moving contact, it can contact and disengage with the stationary contact, thereby enabling the main circuit of the switch to be in a closed or open state. The feature is that during the rotation of the moving contact, the moving contact piece group in the moving contact can be limited and clamped by a limiting boss to slowly reach the final open position.
[0007] In some embodiments, the limiting clamping boss is arranged in the contact module housing on the side away from the closing position of the moving and stationary contacts, and the limiting clamping boss is located on the movement trajectory of the contact head of the moving contact in the moving contact group.
[0008] In some designs, the limiting clamping boss is provided with a slope that gradually increases in the same direction as the contact parting motion trajectory of the moving contact piece in the moving contact piece group.
[0009] In some embodiments, the movable contact assembly is inserted into a rotating housing, which is installed in a movable contact mounting slot in the contact module housing and is rotatable. The movable contact assembly can rotate synchronously with the rotating housing.
[0010] In some embodiments, both ends of the movable contact assembly extend out of the rotating housing, and at least one end of the movable contact assembly can be limited by a limiting clamping boss.
[0011] In some embodiments, the movable contact assembly includes an upper movable contact and a lower movable contact, and the limiting clamping boss includes an upper limiting clamping boss and a lower limiting clamping boss. The ends of the upper and lower movable contacts that extend out of the rotating housing can be limited and clamped by the upper limiting clamping boss and the lower limiting clamping boss.
[0012] Beneficial effects
[0013] This invention provides a contact module structure for a switch, comprising a moving contact 1. During rotation, the moving contact 1 can contact and disengage with a stationary contact, thereby placing the main circuit of the switch in a closed or open state. During rotation, the moving contact 1's moving contact piece group is limited and slowly reaches the final open position by a limiting clamping boss. This limiting clamping boss can block the arc escaping between the moving and stationary contacts, allowing the arc to elongate, thin, and dissipate along a designed path. The limiting clamping boss also causes the moving contact piece group to be clamped inwards, stopping its movement, reducing wear on the housing, and extending the product's service life. Attached Figure Description
[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0015] Appendix Figure 1 This is a schematic diagram of the contact module in the closed state in an embodiment of the present invention.
[0016] Appendix Figure 2 This is a schematic diagram of the contact module in the open state in an embodiment of the present invention.
[0017] Appendix Figure 3 This is a schematic diagram of the moving contact assembly in an un-limited and un-clamped state in an embodiment of the present invention.
[0018] Appendix Figure 4 This is a schematic diagram of the moving contact assembly in a limited and clamped state in an embodiment of the present invention. Detailed Implementation
[0019] 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.
[0020] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.
[0021] 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 at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0022] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is 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 can mean that the first feature is 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.
[0023] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.
[0024] Example
[0025] As attached Figure 1 and2 As shown, a contact module structure for a switch includes a moving contact 1. During rotation, the moving contact 1 can contact and disengage from a stationary contact, thereby placing the main circuit of the switch in a closed or open state. A moving contact assembly 101 is inserted into a rotating housing 4. The rotating housing 4 is installed in a moving contact mounting slot 301 within the contact module housing 3 and is rotatable. The moving contact assembly 101 rotates synchronously with the rotating housing 4. During rotation, the moving contact 1 can be slowly stopped by a limiting clamping boss 2 to reach the final open position. Both ends of the moving contact assembly 101 extend out of the rotating housing 4, and at least one end of the moving contact assembly 101 can be stopped and clamped by the limiting clamping boss 2.
[0026] Specifically, it is as shown in the attached document. Figure 2 As shown, the limiting clamping boss 2 is arranged in the contact module housing 3 on the side away from the closing position of the moving and stationary contacts. The limiting clamping boss 2 is located on the movement trajectory of the contact head of the moving contact in the moving contact assembly 101. The limiting clamping boss 2 is provided with a slope that gradually increases in the same direction as the contact parting movement trajectory of the moving contact in the moving contact assembly 101. The moving contact assembly 101 includes an upper moving contact 101a and a lower moving contact 101b, and the limiting clamping boss 2 includes an upper limiting clamping boss 201 and a lower limiting clamping boss 202. During the opening process, as shown in the attached diagram... Figure 3 As shown, before the upper moving contact 101a and the lower moving contact 101b have contacted the upper limit clamping boss 201 and the lower limit clamping boss 202, the moving contact 1 continues to rotate until the circuit is open, as shown in the attached diagram. Figure 4 As shown, the ends of the upper movable contact 101a and the lower movable contact 101b that extend out of the rotating housing 4 can be limited and clamped by the upper limit clamping boss 201 and the lower limit clamping boss 202.
[0027] This invention provides a contact module structure for a switch, comprising a moving contact 1. During rotation, the moving contact 1 can contact and disengage from a stationary contact 5, thereby placing the main circuit of the switch in a closed or open state. During rotation, the moving contact 1's moving contact piece assembly 101 is limited by a limiting clamping boss 2, slowly reaching the final open position. This limiting clamping boss blocks any arc escaping between the moving and stationary contacts, allowing the arc to elongate, thin, and dissipate along a designed path. The limiting clamping boss also forces the moving contact piece assembly 101 inwards, stopping its movement, reducing wear on the housing, and extending the product's service life.
[0028] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0029] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
Claims
1. A contact module structure for a switch, comprising a moving contact (1), wherein the moving contact (1) is capable of contacting and disengaging from a stationary contact during rotation, thereby placing the main circuit of the switch in a closed or open state, characterized in that: During the rotation of the moving contact (1), the moving contact piece group (101) in the moving contact (1) can be limited and clamped by the limiting boss (2) to slowly reach the final opening position.
2. The contact module structure of a switch as described in claim 1, characterized in that: The limiting clamping boss (2) is arranged in the contact module housing (3) on the side away from the closing position of the moving and stationary contacts. The limiting clamping boss (2) is located on the movement trajectory of the contact head of the moving contact in the moving contact group (101).
3. The contact module structure of a switch as described in claim 2, characterized in that: The limiting clamping boss (2) is provided with a slope that gradually increases in the same direction as the contact parting motion trajectory of the moving contact piece in the moving contact piece group (101).
4. The contact module structure of a switch as described in claim 2, characterized in that: The movable contact assembly (101) is inserted into the rotating housing (4). The rotating housing (4) is installed in the movable contact mounting groove (301) in the contact module housing (3) and can rotate. The movable contact assembly (101) can rotate synchronously with the rotating housing (4).
5. The contact module structure of a switch as described in claim 2, characterized in that: Both ends of the movable contact assembly (101) extend out of the rotating housing (4), and at least one end of the movable contact assembly (101) can be limited by the limiting clamping boss (2).
6. The contact module structure of a switch as described in claim 5, characterized in that: The movable contact assembly (101) includes an upper movable contact (101a) and a lower movable contact (101b). The limiting clamping boss (2) includes an upper limiting clamping boss (201) and a lower limiting clamping boss (202). The ends of the upper movable contact (101a) and the lower movable contact (101b) that extend out of the rotating housing (4) can be limited and clamped by the upper limiting clamping boss (201) and the lower limiting clamping boss (202).