A direct current contactor

Abstract

The utility model relates to a kind of direct current contactors, by respectively setting up in coil framework both ends with moving iron core and static core, when energization, coil magnetic field is efficiently acted on moving iron core, drives it to move to static core quickly, realizes contact closure, when power-off, reset spring provides stable uniform spring force, so that moving iron core is reset quickly, accurately, ensure that contact can reliably separate, control panel can accurately control the on-off of coil, to effectively regulate and control the action of moving iron core and static core, guarantee contactor stable and reliable operation, in addition, coil framework integrally formed with passageway column, the passageway column constructs coil power supply lead passageway between contactor internal control panel and coil, moving iron core and contact support are respectively provided with the first notch and the second notch matched with passageway column, passageway column can be embedded in integral structure, without additional space occupation, guarantee the compactness of contactor structure.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, and in particular to a DC contactor. Background Technology

[0002] DC contactors are core electrical control components in industrial automation, power systems, and new energy vehicles, undertaking the critical tasks of circuit switching and control. However, existing DC contactor technology has many limitations. In terms of contact operation performance, traditional designs have slow response speeds and poor stability, and are prone to jitter during closing and opening, which not only accelerates contact wear and reduces service life, but may also damage internal components due to electric arcing, affecting system control accuracy and response speed. In terms of signal transmission, there is a lack of dedicated channels, relying on simple wire connections, which makes them susceptible to external electromagnetic interference, resulting in inaccurate and unstable signals. In complex electromagnetic environments, this can easily lead to malfunctions in the control system. Structurally, the components are loosely arranged, the overall size is large, occupies a lot of installation space, and is not conducive to heat dissipation. In addition, this structural layout also makes the terminals lack effective isolation, which can easily cause electric shock to operators during installation and maintenance. At the same time, the reliability of the connection between the terminals and the wires is poor. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a DC contactor that is compact in structure, reliable in performance, easy to install and highly safe.

[0004] To achieve the above objectives, this utility model employs a DC contactor comprising a housing, inside which are disposed a contact support and a control board. The contact support contains an iron core assembly, which includes a coil frame installed within the contact support. A coil is wound around the coil frame. One end of the coil frame has a moving iron core sleeved on the outer wall of the coil, and the other end has a stationary iron core sleeved on the outer wall of the coil. A return spring is sleeved on the exterior of both the moving and stationary iron cores. Moving contact bridge assemblies are disposed on both sides of the contact support, with terminals at opposite ends of the moving contact bridge assemblies. A channel post is integrally formed on the coil frame. The moving iron core and the contact support are respectively provided with a first slot and a second slot that match the channel post on the coil frame.

[0005] The beneficial effects of the above structure are as follows: by respectively fitting the moving iron core and the stationary iron core onto both ends of the coil frame, when energized, the coil magnetic field acts efficiently on the moving iron core, driving it to move rapidly towards the stationary iron core, thus achieving contact closure. When de-energized, the return spring provides stable and uniform elastic force, enabling the moving iron core to quickly and accurately reset, ensuring reliable contact separation. The control board can precisely control the energization and de-energization of the coil, thereby effectively regulating the movement of the moving and stationary iron cores and ensuring stable and reliable operation of the contactor. In addition, the coil frame is integrally formed with a channel post, which constructs a coil power lead channel between the internal control board of the contactor and the coil. The moving iron core and the contact support are respectively provided with a first slot and a second slot that match the channel post. The channel post can be embedded in the overall structure without occupying additional space, ensuring the compactness of the contactor structure.

[0006] This utility model is further configured with a housing including a base and a bottom cover on the base. A middle cover is installed on the base, located between the base and the bottom cover. A slot is formed on the middle cover corresponding to the position of the channel post. The control board is mounted on the middle cover, the contact support is installed inside the middle cover, the iron core assembly is disposed within the contact support, and the terminal block is installed inside the base and extends outward through a wiring groove formed on the base. By adopting a layered design of base, middle cover, and bottom cover, a stable and clearly defined support structure is provided for the various components inside the contactor. The terminal block is installed inside the base and extends outward through the wiring groove.

[0007] This utility model is further equipped with a partition on the bottom wall of the base for isolating the terminals. By isolating the terminals from each other with the partition, a safety barrier is formed at the physical level, which greatly reduces the possibility of operators accidentally touching multiple terminals or live areas, and effectively improves the safety of contactor use.

[0008] This utility model is further configured such that the base has first threaded mounting interfaces on both sides, and the bottom cover has corresponding second threaded mounting interfaces on both sides of the base, for fixing the DC contactor to the equipment. The threaded mounting interfaces on both sides of the base and bottom cover provide a clear positioning reference for the contactor installation. During installation, operators can quickly and accurately place the contactor in the correct position based on the interface positions and the mounting holes on the equipment, avoiding repeated adjustments and installation errors caused by inaccurate positioning, thus improving installation efficiency and accuracy. Attached Figure Description

[0009] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the present utility model.

[0010] Figure 2 This is a front view of the internal structure of the shell according to an embodiment of the present utility model.

[0011] Figure 3 This is an exploded view of the contact support and core assembly of this utility model embodiment.

[0012] Figure 4 This is an exploded view of the internal assembly structure of the iron core assembly according to an embodiment of this utility model.

[0013] Figure 5 This is a schematic diagram of the top structure of the middle cover in an embodiment of this utility model.

[0014] Figure 6 This is a schematic diagram of the base bottom wall structure according to an embodiment of the present utility model. Detailed Implementation

[0015] like Figures 1-6 As shown, an embodiment of this utility model provides a DC contactor, including a housing 1. Inside the housing 1, there is a contact support 2 and a control board 3. Inside the contact support 2, there is an iron core assembly 4. The iron core assembly 4 includes a coil frame 41 installed inside the contact support 2. A coil 42 is wound on the coil frame 41. One end of the coil frame 41 is provided with a moving iron core 43 sleeved on the outer wall of the coil 42, and the other end is provided with a stationary iron core 44 sleeved on the outer wall of the coil 42. A return spring 45 is sleeved on the outside of the moving iron core 43 and the stationary iron core 44. Moving contact bridge assemblies 5 are provided inside both sides of the contact support 2. The opposite ends of the moving contact bridge assemblies 5 are provided with terminals 6. A channel post 411 is integrally formed on the coil frame 41. The moving iron core 43 and the contact support 2 are respectively provided with a first slot 431 and a second slot 21 that match the channel post 411 on the coil frame 41. This matching design can ensure that the iron core assembly 4 is accurately installed and positioned inside the contact support 2.

[0016] The housing 1 includes a base 11 and a bottom cover 12 covering the base 11. A middle cover 13 is installed on the base 11 between the base 11 and the bottom cover 12. A slot 131 is provided on the middle cover 13 at the position corresponding to the channel post 411, so that the relevant circuit of the control board 3 can be connected to the channel post 411 through the slot to realize signal transmission. The control board 3 is installed on the middle cover 13. The contact support 2 is installed inside the middle cover 13. The iron core assembly 4 is located inside the contact support 2. The terminal 6 is installed inside the base 11 and extends outward through the wiring slot opened on the base 11. The terminal 6 is also connected to the terminal lug 61. A partition 111 for isolating the terminal 6 is also provided on the bottom wall of the base 11. The partition 111 is cross-shaped. The base 11 has a first threaded mounting interface 112 on both sides. The bottom cover 12 has a corresponding second threaded mounting interface 121 on both sides of the base 11 with the first threaded mounting interface 112, for fixing the DC contactor on the equipment.

[0017] Of course, in addition to the above embodiments, this utility model may have other various embodiments. Without departing from the essential technical solution of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, and these changes or modifications are equivalent to the technical solution in this patent. Therefore, these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. A direct current contactor characterized by: The device includes a housing, inside which are a contact support and a control board. The contact support contains an iron core assembly, which includes a coil frame installed within the contact support. A coil is wound around the coil frame. One end of the coil frame has a moving iron core sleeved on the outer wall of the coil, and the other end has a stationary iron core sleeved on the outer wall of the coil. A return spring is sleeved on the outside of both the moving and stationary iron cores. Moving contact bridge assemblies are located on both sides of the contact support, with terminals at opposite ends of the moving contact bridge assemblies. A channel post is integrally formed on the coil frame. The moving iron core and the contact support each have a first slot and a second slot that match the channel post on the coil frame.

2. The DC contactor of claim 1, wherein: The housing includes a base and a bottom cover on the base. A middle cover is installed on the base between the base and the bottom cover. A slot is provided on the middle cover corresponding to the position of the channel post. The control board is installed on the middle cover. The contact support is installed inside the middle cover. The iron core assembly is located inside the contact support. The terminal block is installed inside the base and extends outward through the terminal slot opened on the base.

3. The DC contactor of claim 2, wherein: The base is also provided with a partition for isolating the terminal blocks.

4. The DC contactor of claim 2, wherein: The base has first threaded mounting interfaces on both sides, and the bottom cover has corresponding second threaded mounting interfaces on both sides of the base, for fixing the DC contactor on the equipment.

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