A switch movable contact with high strength shaft pin

Abstract

The utility model relates to switchgear technical field discloses a switch movable contact with high -strength axle pin, including movable contact body and the equalizing cover that fixed connection in movable contact body outside, the bottom end rotation connection of movable contact body has static contact body, the inboard fixed connection of equalizing cover has disc spring, the top fixed connection of static contact body has the pivot, solved the movable contact of existing switch in actual use operation process, because equalizing cover connecting axle root part is fillet, its outer diameter is greater than disc spring inner diameter, causes the phenomenon of press -in wear between both, so equalizing cover connecting axle is easy to break, leads to product quality reduction, service life greatly shortens the problem, realized the function that can prevent the press -in wear of pivot and equalizing cover to occur in the process of using, improved use effect.

Description

Technical Field

[0001] This utility model relates to the field of switchgear technology, specifically to a switch moving contact with a high-strength shaft pin. Background Technology

[0002] The moving contact of a switch is a movable part in a switching device that can perform opening and closing operations and realize circuit on / off control. In a switching device, the moving contact is usually connected to the operating mechanism. The operating mechanism provides power to move the moving contact. When the operating mechanism applies force, the moving contact will move towards the stationary contact until the two make contact and realize the circuit connection. However, some problems still occur in the actual use of existing switch moving contacts.

[0003] For example, patent application number CN201020181785.4 relates to a grounding switch moving contact used in high and low voltage switchgear. This grounding switch moving contact includes a pair of parallel copper contact pieces. A notch is formed at the corner of the contact piece closest to the stationary contact. This notch is filled by a copper-tungsten alloy filler block welded together, which is resistant to sintering. In actual use, existing switch moving contacts suffer from wear and tear due to the rounded corners at the root of the equalizing cover shaft, which has an outer diameter larger than the inner diameter of the disc spring. This causes the equalizing cover shaft to break easily, resulting in reduced product quality and a significantly shortened service life.

[0004] To address the aforementioned problems, a switch moving contact with a high-strength pivot pin is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a switch moving contact with a high-strength shaft pin. By using this device, the problem of existing switch moving contacts being prone to breakage during actual use is solved. This is because the root of the equalizing cover shaft is rounded, and its outer diameter is larger than the inner diameter of the disc spring, which leads to jamming and wear between the two. As a result, the equalizing cover shaft is prone to breakage, leading to reduced product quality and a significantly shortened service life.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a switch moving contact with a high-strength shaft pin, comprising a moving contact body and a pressure equalization cover fixedly connected to the outside of the moving contact body, a stationary contact body rotatably connected to the bottom end of the moving contact body, a disc spring fixedly connected to the inner side of the pressure equalization cover, and a rotating shaft fixedly connected to the top end of the stationary contact body.

[0007] Preferably, the stationary contact body is rotatably connected to the bottom of the moving contact body via a rotating shaft.

[0008] The above-mentioned structural design connects the stationary contact body and the moving contact body through a rotating shaft, allowing them to open and close flexibly to achieve circuit switching. This connection method not only ensures the stable cooperation between the moving and stationary contacts, but also enhances the overall structural strength through the rigid support of the rotating shaft. It avoids component damage caused by uneven force in traditional connection methods, and lays a structural foundation for reducing clamping wear in the future.

[0009] Preferably, the stationary contact body has a self-lubricating coating on both the left and right sides near the top.

[0010] With the above-mentioned structural design, a self-lubricating coating is provided on both sides of the top of the stationary contact body. The low friction characteristics of the coating reduce the direct friction loss between it and the inner wall of the moving contact body. When the moving contact and the stationary contact rotate relative to each other, the self-lubricating coating can reduce the friction coefficient of the contact surface, avoid hard wear between metals, reduce the heat generated by friction, extend the service life of the components, and improve the operating stability of the switch moving contact.

[0011] Preferably, the self-lubricating coating is in contact with the inner wall of the moving contact body, and an arc-shaped groove is provided on the outer side of the rotating shaft.

[0012] With the above-mentioned structural design, the self-lubricating coating is in direct contact with the inner wall of the moving contact body, which further enhances the lubrication effect and ensures that the frictional resistance remains at a low level during rotation. The arc-shaped groove on the outside of the shaft reduces stress concentration at the contact point between the shaft and the moving contact body by optimizing the shaft structure. This combination of "lubrication and friction reduction + structural stress relief" design can reduce mechanical wear and improve the fatigue resistance of the shaft, effectively preventing the shaft from breaking due to long-term stress.

[0013] Preferably, multiple sets of arc-shaped grooves are provided, and the arc-shaped grooves are located at the contact position between the moving contact body and the rotating shaft.

[0014] With the above-mentioned structural design, multiple sets of arc-shaped grooves are distributed at the contact position between the moving contact body and the rotating shaft. This can further optimize the stress state of the shaft by dispersing stress. Each set of arc-shaped grooves can share the local pressure, avoiding cracks or breakage in a single part due to excessive stress. Especially for traditionally vulnerable areas such as the root of the rotating shaft, the synergistic effect of multiple sets of arc-shaped grooves significantly improves the overall strength and fracture resistance of the shaft pin, and extends the service life of the moving contact of the switch.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. This application proposes a high-strength pivot pin for a switch, which solves the problem that existing switch pivot pins, due to the rounded corner at the root of the equalizing cover connecting shaft and its outer diameter being larger than the inner diameter of the disc spring, experience jamming and wear between them during actual use. This leads to the easy breakage of the equalizing cover connecting shaft, resulting in reduced product quality and a significantly shortened service life. In this application, the entire structure can be installed in a designated position. The rotating shaft inside the stationary contact body improves the overall structural strength of the shaft. The shaft is made of 45# steel plate, which has high strength and hardness, making it less prone to wear and breakage during use. The small rounded corner at the root of the shaft negligibles the jamming phenomenon with the disc spring, further enhancing the overall strength of the shaft. The self-lubricating coating uses PTFE, achieving self-lubrication under dry friction conditions. Furthermore, an arc groove is provided on the outer side of the shaft to suppress stress concentration at the root of the pivot pin, further avoiding the risk of breakage. This effectively prevents jamming and wear of the shaft and equalizing cover during use, improving the overall performance. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a cross-sectional view of the overall structure of this utility model;

[0019] Figure 3 For the present utility model Figure 3 Enlarged structural diagram at point A in the middle;

[0020] Figure 4 This is a structural diagram of the self-lubricating coating and arc-shaped groove of this utility model.

[0021] In the figure: 1. Moving contact body; 2. Equalizing cover; 3. Stationary contact body; 4. Disc spring; 5. Rotating shaft; 51. Self-lubricating coating; 52. Arc groove. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0024] Combination Figures 1-4A switch moving contact with a high-strength shaft pin includes a moving contact body 1 and a pressure equalization cover 2 fixedly connected to the outside of the moving contact body 1. A stationary contact body 3 is rotatably connected to the bottom end of the moving contact body 1. A disc spring 4 is fixedly connected to the inner side of the pressure equalization cover 2. A rotating shaft 5 is fixedly connected to the top end of the stationary contact body 3.

[0025] The present invention will be further described below with reference to the embodiments. Example 1

[0026] To address the problem that existing switch moving contacts, due to the rounded corners at the root of the equalizing cover 2 connecting shaft and its outer diameter being larger than the inner diameter of the disc spring 4, experience jamming and wear between them during actual operation, leading to easy breakage of the equalizing cover 2 connecting shaft, resulting in reduced product quality and significantly shortened service life, this embodiment discloses the following technical solution, specifically as follows: Figures 1-4 As shown, the stationary contact body 3 is rotatably connected to the bottom of the moving contact body 1 via a rotating shaft 5. Self-lubricating coatings 51 are provided on both the left and right sides near the top of the stationary contact body 3, and these coatings 51 contact the inner wall of the moving contact body 1. An arc-shaped groove 52 is provided on the outer side of the rotating shaft 5; multiple sets of arc-shaped grooves 52 are provided. These grooves are positioned at the contact points between the moving contact body 1 and the rotating shaft 5. During use, the entire structure can be installed in a designated location. Due to the rotating shaft 5 inside the stationary contact body 3, the overall structural strength of the rotating shaft 5 is improved. The rotating shaft 5 adopts... The material used is No. 45 steel plate, which has high strength and hardness, making it less prone to wear and breakage during use. The radius of the shaft 5 is small, and the jamming phenomenon with the disc spring 4 is negligible, thus improving the overall strength of the shaft 5. The self-lubricating coating 51 is made of PTFE material, which achieves self-lubrication under dry friction conditions. In addition, an arc groove 52 is provided on the outer side of the shaft 5, which can suppress the stress concentration phenomenon at the root of the shaft pin and further avoid the risk of breakage failure. This achieves the function of preventing jamming and wear of the shaft 5 and the pressure equalizing cover 2 during use, thus improving the performance.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A switch moving contact with a high-strength pivot pin, comprising a moving contact body (1) and a pressure equalization cover (2) fixedly connected to the outside of the moving contact body (1), wherein a stationary contact body (3) is rotatably connected to the bottom end of the moving contact body (1), characterized in that: A disc spring (4) is fixedly connected to the inner side of the equalizing cover (2), and a rotating shaft (5) is fixedly connected to the top of the stationary contact body (3).

2. A switch moving contact with a high-strength shaft pin according to claim 1, characterized in that: The stationary contact body (3) is rotatably connected to the bottom of the moving contact body (1) via a rotating shaft (5).

3. A switch moving contact with a high-strength shaft pin according to claim 1, characterized in that: The stationary contact body (3) has a self-lubricating coating (51) on both the left and right sides near the top.

4. A switch moving contact with a high-strength shaft pin according to claim 3, characterized in that: The self-lubricating coating (51) is in contact with the inner wall of the moving contact body (1), and an arc groove (52) is provided on the outer side of the rotating shaft (5).

5. A switch moving contact with a high-strength shaft pin according to claim 4, characterized in that: Multiple sets of arc-shaped grooves (52) are provided, and the arc-shaped grooves (52) are provided at the contact position between the moving contact body (1) and the rotating shaft (5).

Images