Single-body double-loop direct current contactor

Abstract

The utility model relates to the technical field of direct-current contactors, and particularly provides a single-body double-loop direct-current contactor, which comprises an iron cup, the iron cup is provided with an upper cavity and a lower cavity, and a guide plate is arranged between the upper cavity and the lower cavity; a static contact is arranged at the upper end of the upper cavity, and a movable contact is arranged at the lower end of the upper cavity; a driving mechanism is arranged in the iron cup and is used for driving the movable contact to movably contact with the static contact so as to control the on-off of current; the number of the movable contacts is two, a connecting block is arranged between the two movable contacts, and the output end of the driving mechanism is connected to the connecting block. According to the utility model, the two movable contacts and the two groups of static contacts matched with the movable contacts are arranged in one direct current contactor, and the two movable contacts are connected through the connecting block, so that the on-off of double direct current loops can be controlled by synchronous action, the effect of controlling the switch by the double loops is achieved, and the market application requirement is met.

Description

Technical Field

[0001] The utility model relates to the technical field of DC contactors, in particular to a single-body double-circuit DC contactor. Background Art

[0002] A DC contactor is a contactor used in a DC circuit, mainly used to control DC circuits (main circuits, control circuits, excitation circuits, etc.).

[0003] In order to meet the market demand for dual-circuit control switches, the traditional technology uses "twin" DC contactors, please refer to Figure 1 That is, two products are assembled into one housing, and two sets of control coils are connected in parallel. This method has a response time difference when the two sets of control coils drive the two products, and the use effect is not good; and the assembled DC contactor is large in size. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a single double-circuit DC contactor to solve the problems of response time difference and large size in the prior art when an assembled DC contactor is used to drive two products through two sets of control coils.

[0005] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides a single-body double-circuit DC contactor, including an iron cup, wherein the iron cup has an upper cavity and a lower cavity, and a guide plate is arranged between the upper cavity and the lower cavity; a static contact is arranged at the upper end of the upper cavity, and a moving contact is arranged at the lower end;

[0006] A driving mechanism is arranged in the iron cup, and the driving mechanism is used to drive the moving contact to movably contact the static contact to control the on-off of the current;

[0007] There are two moving contacts, a connecting block is provided between the two moving contacts, and the output end of the driving mechanism is connected to the connecting block;

[0008] The static contacts are provided with two groups, each group of static contacts corresponds to one moving contact for contact and conduction, and each group of static contacts has two static contacts;

[0009] The two moving contacts have the same structure, both comprising a vertical shaft and a long rectangular contact movably sleeved on the vertical shaft. When the moving contact movably contacts the stationary contact, the long rectangular contact contacts the two stationary contacts at the same time.

[0010] In one embodiment of the present invention, the driving mechanism comprises:

[0011] A moving iron core, wherein the moving iron core is disposed in the lower cavity;

[0012] The coil is placed in the lower cavity, and the moving iron core is movably placed in the space surrounded by the coil;

[0013] A shaft, wherein the lower end of the shaft extends into the lower cavity to pass through the moving iron core, and the upper end of the shaft extends into the upper cavity to pass through the connecting block;

[0014] The magnetic conductive sheet is arranged on the guide plate.

[0015] In one embodiment of the utility model, a reaction spring is arranged on the rod body of the shaft located in the lower cavity, and the upper end of the reaction spring is connected to the guide plate, and the lower end is connected to the moving iron core.

[0016] In one embodiment of the utility model, a contact spring is provided on the outer side of the vertical shaft, the upper end of the contact spring is connected to the long rectangular contact, and the lower end is connected to the connecting block.

[0017] In one embodiment of the utility model, a fixing ring is provided at the upper end of the iron cup, and the static contact is assembled on the fixing ring; and an upper cover is provided at the upper end of the fixing ring.

[0018] In an embodiment of the present invention, a shell is sleeved on the outside of the iron cup.

[0019] As described above, the single-body double-circuit DC contactor of the utility model has the following beneficial effects:

[0020] The utility model places two moving contacts and two groups of static contacts used in conjunction with the moving contacts in a DC contactor. The two moving contacts are connected by a connecting block to realize synchronous action control of the on and off of dual DC circuits, thereby achieving the effect of dual-circuit control switch and meeting market application needs. Compared with the assembled DC contactor used in traditional technology, the structure is more compact and smaller in size, and the problem of response time difference caused by two groups of control coils being connected in parallel can be avoided, thereby achieving the purpose of stable synchronization and better use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Shown is a schematic diagram of the external structure of an assembled DC contactor disclosed in the prior art.

[0022] Figure 2 Shown is a schematic structural diagram of a single-body double-circuit DC contactor disclosed in the present utility model.

[0023] Figure 3 Shown is a schematic diagram of the exploded structure of a single-body double-circuit DC contactor disclosed in the present utility model.

[0024] Figure 4 Shown is a schematic cross-sectional structure diagram of a single-body double-circuit DC contactor disclosed in the present utility model.

[0025] Component number description

[0026] Iron cup 1; upper cavity 11; lower cavity 12; guide plate 13; static contact 2; static contact 21; moving contact 3; vertical axis 31; long rectangular contact 32; connecting block 4; moving iron core 5; coil 6; shaft 7; contact spring 8; reaction spring 9; housing 10; fixing ring 14; upper cover 15; magnetic conductive sheet 16. DETAILED DESCRIPTION

[0027] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0028] See also Figures 2 to 4 It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change in the proportion relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the utility model without affecting the effects and purposes that can be achieved by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the utility model without substantially changing the technical content.

[0029] See also Figure 2-4 The utility model provides a single double-circuit DC contactor, including an iron cup 1, wherein the iron cup 1 has an upper cavity 11 and a lower cavity 12, and a guide plate 13 is provided between the upper cavity 11 and the lower cavity 12; a static contact 2 is provided at the upper end of the upper cavity 11, and a moving contact 3 is provided at the lower end; a fixing ring 14 is provided at the upper end of the iron cup 1, and the static contact 2 is assembled on the fixing ring 14; an upper cover 15 is provided at the upper end of the fixing ring 14; and a shell 10 is sleeved on the outside of the iron cup 1.

[0030] A driving mechanism is arranged in the iron cup 1, and the driving mechanism includes a moving iron core 5, a coil 6, a shaft 7, and a magnetic conductive sheet 16. The moving iron core 5 is placed in the lower cavity 12; the coil 6 is placed in the lower cavity 12, and the moving iron core 5 is movably placed in the space surrounded by the coil 6; the lower end of the shaft 7 extends into the lower cavity 12 to pass through the moving iron core 5, and the upper end extends into the upper cavity 11 to pass through the connecting block 4; the magnetic conductive sheet 16 is arranged on the guide plate 13; the driving mechanism is used to drive the moving contact 3 to movably contact the static contact 2 to control the on-off of the current. Specifically, when the control circuit applies current, a magnetic field is generated inside the coil 6, which attracts the moving iron core 5 to move toward the magnetic conductive sheet 16, so that the moving contact 3 contacts and closes with the static contact 2, thereby controlling the conduction of the circuit; when the control circuit is powered off, the magnetic field inside the coil 6 disappears, the moving contact 3 returns to its original position, and the circuit is interrupted.

[0031] There are two moving contacts 3, a connecting block 4 is provided between the two moving contacts 3, and the output end of the driving mechanism is connected to the connecting block 4; there are two groups of static contacts 2, and a single group of static contacts 2 corresponds to one moving contact 3 for contact and conduction; a single group of static contacts 2 has two static contacts 21; the two moving contacts 3 have the same structure, both including a vertical shaft 31 and a long rectangular contact 32 movably sleeved on the vertical shaft 31, and when the moving contact 3 movably contacts the static contact 2, the long rectangular contact 32 contacts with the two static contacts 21 at the same time; a contact spring 8 is provided on the outer side of the vertical shaft 31, and the upper end of the contact spring 8 is connected to the long rectangular contact 32, and the lower end is connected to the connecting block 4; the contact spring 8 is used to improve the resetting effect of the moving contact 3 when the control circuit is powered off. The utility model places two moving contacts 3 and two groups of static contacts 2 used in conjunction with the moving contacts 3 in a DC contactor. The two moving contacts 3 are connected by a connecting block 4 to realize synchronous action control of the on and off of dual DC circuits, thereby achieving the effect of dual-circuit control switch and meeting market application needs.

[0032] A reaction spring 9 is arranged on the rod of the shaft 7 located in the lower cavity 12, the upper end of the reaction spring 9 is connected to the guide plate 13, and the lower end is connected to the moving iron core 5; the reaction spring 9 is used to pull the shaft 7 to reset after the coil is powered off.

[0033] In summary, the utility model places two moving contacts 3 and two groups of static contacts 2 used in conjunction with the moving contacts 3 in a DC contactor. The two moving contacts 2 are connected by a connecting block 4 to achieve synchronous action control of the on and off of the dual DC circuits, achieving the effect of dual-circuit control switches, and meeting market application needs; compared with the assembled DC contactor used in traditional technology, the structure is more compact and smaller, and the problem of response time difference caused by the parallel connection of two groups of control coils can be avoided, achieving the purpose of stable synchronization, and the use effect is better. Therefore, the utility model effectively overcomes various shortcomings in the prior art and has a high industrial utilization value.

[0034] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A single-body double-circuit DC contactor, comprising an iron cup (1), wherein the iron cup (1) has an upper cavity (11) and a lower cavity (12), and a guide plate (13) is provided between the upper cavity (11) and the lower cavity (12); a static contact (2) is provided at the upper end of the upper cavity (11), and a moving contact (3) is provided at the lower end; A driving mechanism is arranged in the iron cup (1), and the driving mechanism is used to drive the moving contact (3) to movably contact the static contact (2) to control the on-off of the current; Features: There are two moving contacts (3), a connecting block (4) is provided between the two moving contacts (3), and the output end of the driving mechanism is connected to the connecting block (4); The static contacts (2) are provided with two groups, each group of static contacts (2) corresponds to one moving contact (3) for contact and conduction, and each group of static contacts (2) has two static contacts (21); The two movable contacts (3) have the same structure, and both comprise a vertical shaft (31) and a long rectangular contact (32) movably sleeved on the vertical shaft (31); when the movable contact (3) movably contacts the stationary contact (2), the long rectangular contact (32) contacts the two stationary contacts (21) at the same time.

2. The single-body double-circuit DC contactor according to claim 1, characterized in that: The driving mechanism comprises: A moving iron core (5), wherein the moving iron core (5) is placed in the lower cavity (12); A coil (6), wherein the coil (6) is placed in the lower cavity (12), and the moving iron core (5) is movably placed in the space surrounded by the coil (6); A shaft (7), wherein the lower end of the shaft (7) extends into the lower cavity (12) and passes through the moving iron core (5), and the upper end of the shaft (7) extends into the upper cavity (11) and passes through the connecting block (4); A magnetic conductive sheet (16), wherein the magnetic conductive sheet (16) is arranged on the guide plate (13).

3. The single-body double-circuit DC contactor according to claim 2, characterized in that: A reaction spring (9) is arranged on the rod of the shaft (7) located in the lower cavity (12); the upper end of the reaction spring (9) is connected to the guide plate (13) and the lower end is connected to the moving iron core (5).

4. The single-body double-circuit DC contactor according to claim 1, characterized in that: A contact spring (8) is arranged outside the vertical shaft (31), the upper end of the contact spring (8) is connected to a long rectangular contact (32), and the lower end is connected to a connecting block (4).

5. The single-body double-circuit DC contactor according to claim 1, characterized in that: A fixing ring (14) is arranged at the upper end of the iron cup (1), and the static contact (2) is assembled on the fixing ring (14); and an upper cover (15) is arranged at the upper end of the fixing ring (14).

6. The single-body double-circuit DC contactor according to claim 1, characterized in that: The outer portion of the iron cup (1) is sleeved with an outer shell (10).

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