Direct-current contactor supporting elastic sheet structure capable of reducing bounce

Abstract

The utility model discloses a direct current contactor supporting elastic sheet structure capable of reducing bounce, which relates to the technical field of direct current contactors and comprises a guide plate, a magnetic conductive sheet is mounted at the bottom of the guide plate, a movable iron core is arranged at the bottom of the guide plate, and a circular shaft is mounted on the movable iron core in a penetrating manner. A counter-force spring is installed between the movable iron core and the guide plate, the counter-force spring sleeves the outer side of a circular shaft, the top end of the circular shaft penetrates through the guide plate, a movable contact piece is installed at the position, close to the top end, of the outer side of the circular shaft, a contact spring is jointly installed between the movable contact piece and the guide plate, and the contact spring sleeves the outer side of the circular shaft. According to the direct current contactor, after the supporting elastic pieces are additionally arranged, the contact point bounce amplitude at the contact moment is reduced, contact ablation caused by bounce at the on-load connection moment can be reduced, the on-load connection service life of the direct current contactor can be remarkably prolonged, and the service life of the direct current contactor is prolonged. And the anti-adhesion capability of on-load connection of the direct-current contactor is improved.

Description

Technical Field

[0001] This utility model relates to the field of DC contactor technology, specifically to a DC contactor support spring structure that reduces bounce. Background Technology

[0002] In the DC contactor market, it is often referred to as the moving contact assembly. This part is the moving component in the DC contactor. The moving iron core moves upward, causing the moving contact to move upward and make contact with the stationary contact to conduct electricity, thus realizing the conduction of the main circuit of the DC contactor as a switching element.

[0003] Currently, the moving contact assembly structure of DC contactors on the market is relatively uniform, all adopting a bridge-type moving contact, and all featuring a contact spring at the bottom of the moving contact to provide contact pressure. While this achieves certain functions, in actual use, the support point of a single contact spring is very centrally located. During the engagement process, the moving contact bounces after contacting the stationary contact, causing significant oscillation and resulting in severe bouncing. This can easily lead to contact erosion and adhesion when connected under load. Utility Model Content

[0004] The purpose of this utility model is to provide a DC contactor support spring structure that reduces bounce, so as to solve the problem mentioned in the background art. This technical solution can support both ends of the moving contact, so that the moving contact will not swing left and right significantly, thereby improving the DC contactor's lifespan under load and its anti-adhesion capability under load.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a DC contactor support spring structure for reducing bounce, comprising a guide plate, a magnetic sheet installed at the bottom of the guide plate, and a moving iron core provided at the bottom of the guide plate. A circular shaft is installed through the moving iron core, and a reaction spring is installed between the moving iron core and the guide plate. The reaction spring is sleeved on the outside of the circular shaft. The top of the circular shaft passes through the guide plate, and a moving contact piece is installed near the top of the outer side of the circular shaft. A contact spring is installed between the moving contact piece and the guide plate, and the contact spring is sleeved on the outside of the circular shaft. A support spring is installed between the bottom of the moving contact piece and the top of the guide plate.

[0006] Preferably, the support spring includes a base plate with a circular hole. The base plate is mounted on the top of the guide plate, and the circular shaft passes through the circular hole. Two support plates are fixedly mounted on the base plate. Each of the two support plates has a side groove, and the two side grooves are respectively engaged with the two ends of the movable contact plate.

[0007] Preferably, a pad is attached to the top of the substrate, and the top of the pad is fixedly connected to the bottom of the reaction spring.

[0008] Preferably, the pad is circular, and the outer diameter of the pad is larger than the inner diameter of the circular hole.

[0009] Preferably, both of the support plates are inclined.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] By incorporating a support spring, positioned below the moving contact, the support spring stabilizes the moving contact when it bounces back from the contact point, preventing it from swaying significantly from side to side. Furthermore, the increased support spring reduces the contact bounce amplitude at the moment of contact, minimizing contact erosion caused by bounce during load switching. This significantly extends the load switching life of the DC contactor and enhances its anti-sticking capability during load switching. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the planar structure of the support spring after installation.

[0013] Figure 2 This is a three-dimensional structural diagram of the support spring sheet after installation of this utility model;

[0014] Figure 3 This is a schematic diagram of the structure of the supporting spring sheet of this utility model.

[0015] In the diagram: 1. Moving iron core; 2. Guide plate; 3. Reaction spring; 4. Magnetic sheet; 5. Round shaft; 6. Contact spring; 7. Moving contact piece; 8. Support spring piece; 81. Base plate; 82. Round hole; 83. Support piece; 84. Side groove; 9. Pad block. Detailed Implementation

[0016] 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.

[0017] Please see Figures 1 to 3This utility model provides a technical solution: a DC contactor support spring structure to reduce bounce, including a guide plate 2, a magnetic sheet 4 installed at the bottom of the guide plate 2, and a moving iron core 1 at the bottom of the guide plate 2. A round shaft 5 is installed through the moving iron core 1, and a reaction spring 3 is installed between the moving iron core 1 and the guide plate 2. The reaction spring 3 is sleeved on the outside of the round shaft 5. The top of the round shaft 5 passes through the guide plate 2, and a moving contact piece 7 is installed near the top of the round shaft 5. A contact spring 6 is installed between the moving contact piece 7 and the guide plate 2. The contact spring 6 is sleeved on the outside of the round shaft 5, and a support spring 8 is installed between the bottom of the moving contact piece 7 and the top of the guide plate 2.

[0018] Specifically, when the moving contact 7 bounces back during a collision, the supporting spring 8, being connected to both ends of the moving contact 7, plays a stabilizing role, preventing the moving contact 7 from swinging significantly from side to side, thus improving stability. It can also reduce contact erosion caused by bouncing during the moment of connection under load, significantly improving the lifespan of the DC contactor under load and enhancing its anti-adhesion capability during connection under load.

[0019] As an optional implementation, the support spring 8 includes a base plate 81 with a circular hole 82. The base plate 81 is mounted on the top of the guide plate 2, and the circular shaft 5 passes through the circular hole 82. Two support plates 83 are fixedly mounted on the base plate 81. Each of the two support plates 83 has a side groove 84, and the two side grooves 84 are respectively engaged with the two ends of the movable contact plate 7.

[0020] Specifically, the substrate 81 is fitted onto the outside of the circular shaft 5, and the two support pieces 83 are respectively snapped into the two ends of the moving contact piece 7 to complete the installation of the support spring piece 8. The installation is convenient and can also play a stabilizing role.

[0021] As an optional implementation, a pad 9 is attached to the top of the substrate 81, and the top of the pad 9 is fixedly connected to the bottom of the reaction spring 3.

[0022] Specifically, by setting the pad 9, the substrate 81 can be stably positioned on the guide plate 2, making subsequent operations more stable.

[0023] As an optional implementation, the pad 9 is circular, and the outer diameter of the pad 9 is larger than the inner diameter of the circular hole 82.

[0024] Specifically, the above settings enable the pad 9 to provide a good limiting effect on the substrate 81.

[0025] As an optional implementation, both support plates 83 are inclined.

[0026] Specifically, this arrangement makes the fixing points of the two support plates 83 and the base plate 81 arranged in a triangular shape, forming a triangular force-bearing point, which improves stability.

[0027] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 based on the specific circumstances.

[0029] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A DC contactor support spring structure for reducing bounce, comprising a guide plate (2), characterized in that: A magnetic sheet (4) is installed at the bottom of the guide plate (2), and a moving iron core (1) is provided at the bottom of the guide plate (2). A round shaft (5) is installed through the moving iron core (1), and a reaction spring (3) is installed between the moving iron core (1) and the guide plate (2). The reaction spring (3) is sleeved on the outside of the round shaft (5). The top of the round shaft (5) passes through the guide plate (2), and a moving contact piece (7) is installed near the top of the outside of the round shaft (5). A contact spring (6) is installed between the moving contact piece (7) and the guide plate (2). The contact spring (6) is sleeved on the outside of the round shaft (5). A support spring piece (8) is installed between the bottom of the moving contact piece (7) and the top of the guide plate (2).

2. The DC contactor support spring structure for reducing bounce according to claim 1, characterized in that: The support spring (8) includes a base plate (81), on which a circular hole (82) is provided. The base plate (81) is mounted on the top of the guide plate (2), and the circular shaft (5) passes through the circular hole (82). Two support plates (83) are fixedly installed on the base plate (81). Each of the two support plates (83) has a side groove (84), and the two side grooves (84) are respectively engaged with the two ends of the movable contact plate (7).

3. The DC contactor support spring structure for reducing bounce according to claim 2, characterized in that: A pad (9) is attached to the top of the substrate (81), and the top of the pad (9) is fixedly connected to the bottom of the reaction spring (3).

4. The DC contactor support spring structure for reducing bounce according to claim 3, characterized in that: The pad (9) is circular, and the outer diameter of the pad (9) is larger than the inner diameter of the circular hole (82).

5. A DC contactor support spring structure for reducing bounce according to claim 2, characterized in that: Both of the support plates (83) are inclined.

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