CN211719522U

CN211719522U - Totally enclosed type contactor

Info

Publication number: CN211719522U
Application number: CN202020007140.2U
Authority: CN
Inventors: 吕斌; 吕光聪; 唐邵柯
Original assignee: ZHEJIANG YANGMING AUTO PARTS CO Ltd
Current assignee: ZHEJIANG YANGMING AUTO PARTS CO Ltd
Priority date: 2020-01-03
Filing date: 2020-01-03
Publication date: 2020-10-20
Anticipated expiration: 2030-01-03

Abstract

The utility model discloses a totally enclosed type contactor, it includes the casing, be equipped with the cavity in the casing, the one end of casing is equipped with mounting flange, the other end of casing is equipped with two high current double-screw bolts and two low current double-screw bolts, be equipped with in the cavity and remove drive assembly, be equipped with two and the corresponding moving contact in high current double-screw bolt position on removing drive assembly, the one end of high current double-screw bolt all is located the outside of casing with the one end of low current double-screw bolt, the other end of high current double-screw bolt all runs through the casing with the other end of low current double-screw bolt and is located the cavity, the one end that the high current double-screw bolt is located the cavity is equipped with the static contact with moving contact assorted, the one end that the low current double-screw. The utility model has the advantages that: the sealing performance of the shell is improved; preventing contact erosion.

Description

Totally enclosed type contactor

Technical Field

The utility model belongs to the technical field of the relevant technique of contactor and specifically relates to indicate a totally enclosed type contactor.

Background

The contactor in the automobile application is an important part in an automobile control circuit, is used for controlling the on-off function of a high-power electrical appliance, and needs to bear a heavy current load of 400A. In the prior art, the sealing performance of a contactor used for an automobile cannot meet the requirement, and a contact is easy to ablate, so that the service life of a switch is shortened, and the requirement of a customer cannot be met.

SUMMERY OF THE UTILITY MODEL

The utility model relates to an overcome among the prior art not enough that the contactor leakproofness can not reach the requirement, the contact ablates easily, provide a totally enclosed type contactor that the leakproofness is good and the contact is difficult for ablating.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a cavity is arranged in the shell, a mounting flange is arranged at one end of the shell, two high-current studs and two low-current studs are arranged at the other end of the shell, a movable driving assembly is arranged in the cavity, two moving contacts corresponding to the high-current studs are arranged on the movable driving assembly, one ends of the high-current studs and one ends of the low-current studs are located outside the shell, the other ends of the high-current studs and the low-current studs penetrate through the shell and are located in the cavity, fixed contacts matched with the moving contacts are arranged at one ends of the high-current studs and the low-current studs, one ends of the low-current studs located in the cavity are electrically connected with the movable driving assembly, and the high-current studs and the low-current studs are integrally formed with the shell through injection molding.

The high-current stud and the low-current stud are arranged in the cavity in a penetrating mode, a fixed contact matched with the fixed contact is arranged at one end, located in the cavity, of the high-current stud, one end of the low-current stud is electrically connected with the moving driving assembly, and the high-current stud and the low-current stud are integrated into a whole through injection molding. The external circuit leads a small current into the mobile driving component through the low-current stud, a moving contact on the mobile driving component is close to and contacted with the fixed contact, and the moving contact is communicated with the fixed contact; the high-current stud and the low-current stud are integrated with the shell through injection molding, and the purposes of good sealing performance and difficulty in ablation of contacts are achieved.

Preferably, two reinforcing plates corresponding to the high-current studs one to one are arranged in the cavity, and the reinforcing plates are positioned at one ends of the two high-current studs and the two low-current studs on the shell and positioned on the side faces of the high-current studs. The design is favorable for meeting the requirement of torque after the high-current stud is injected, and the service life of the contactor is prolonged.

Preferably, the connecting surfaces of the high-current stud and the low-current stud and the shell are respectively provided with a plurality of shaft shoulders with different diameters. The design is beneficial to improving the sealing performance between the high-current stud and the shell and between the low-current stud and the shell.

Preferably, the high current stud is made of copper, and the low current stud is made of iron. The design is favorable for realizing that a high-current stud conducts large current, a low-current stud conducts small current, the moving driving assembly is powered by the small current to generate driving force, the moving contact moves to be communicated with the fixed contact to generate large current, and the moving contact is conducted through the high-current stud.

Preferably, the movable driving assembly comprises an iron sheet, an electromagnetic coil and a connecting sheet, the iron sheet is fixedly connected with the side wall of the cavity, two arc extinguishing devices corresponding to the static contact positions are arranged on one side of the iron sheet, the electromagnetic coil is located on the other side of the iron sheet, the arc extinguishing devices are installed at one ends close to the high-current stud and the low-current stud, the electromagnetic coil is installed at one end far away from the high-current stud and the low-current stud, an iron core is arranged in the electromagnetic coil and is connected with the electromagnetic coil in a sliding mode, a connecting rod is arranged on the iron core, one end of the connecting rod is fixedly connected with the iron core, the other end of the connecting rod penetrates through the iron sheet and is fixedly connected with the connecting sheet, the connecting rod is connected with the iron sheet in a sliding mode. The contactor has the advantages that the contact of the contactor is in a normally open state, the electromagnetic coil generates a magnetic field after being electrified through the low-current stud, the magnetic field magnetizes the iron core, the iron core generates attraction with the upper iron sheet after being magnetized, the iron core drives the connecting sheet to move upwards through the connecting rod after the attraction overcomes the spring force of the spring I, and the two movable contacts on the connecting sheet respectively communicate the two stationary contacts; when the contactor is powered off, the magnetism of the iron core disappears, the first spring enables the iron core and the connecting sheet to reset, and the two contacts are disconnected; the process of switching on and switching off the current of the moving contact and the static contact is usually accompanied with the generation and extinguishing of electric arcs, the electric arcs are a gas discharge phenomenon, the contacts are easy to ablate, meanwhile, certain harm is caused to electric appliances, and the arc extinguishing device is beneficial to reducing the burning loss of the electric arcs to the contacts and limiting the space of electric arc expansion.

Preferably, one of the low current studs is electrically connected to the positive pole of the solenoid coil and the other low current stud is electrically connected to the negative pole of the solenoid coil. The design is convenient for an external circuit to electrify the electromagnetic coil through the low-current stud to generate a magnetic field.

Preferably, the arc extinguishing device comprises a grid plate and a lever, a rotating support is arranged on the side wall of the cavity, a rotating shaft is arranged on the lever, the lever is rotatably connected with the rotating support through the rotating shaft, the grid plate is fixedly connected with the end portion of the lever, the grid plate is located between the moving contact and the static contact, a second spring is arranged at one end, provided with the grid plate, of the lever, one end of the second spring is connected with the side wall of the cavity, and the other end of the second spring is connected with the lever. When the electromagnetic coil is electrified, the iron core drives the connecting sheet to move upwards through the connecting rod, and the second spring contracts to drive the grid plate to reset, so that a moving contact on the connecting sheet is in contact communication with a static contact on the high-current stud; when the electromagnetic coil is powered off, the iron core drives the connecting sheet to move downwards through the connecting rod, the moving contact is disconnected with the static contact, two ends of the connecting sheet are in contact with the lever, the connecting sheet and the grid plate are respectively positioned on two sides of the rotating support at the moment, the spring II is stretched according to the lever principle, and the grid plate moves between the moving contact and the static contact to play a role in arc extinction and prevent the contact from being ablated.

The utility model has the advantages that: the sealing performance of the shell is improved; preventing contact erosion; the service life of the contactor is prolonged.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a cross-sectional view A-A of the solenoid of FIG. 1 when not energized;

FIG. 3 is a cross-sectional view A-A of the solenoid of FIG. 1 when energized;

fig. 4 is a sectional view of B-B in fig. 1.

In the figure: 1. the novel arc extinguishing device comprises a shell, a cavity, a mounting flange, a high-current stud, a low-current stud, a moving driving assembly, a moving contact, a fixed contact, a reinforcing plate, a shaft shoulder, an iron sheet, an electromagnetic coil, a connecting sheet, an arc extinguishing device, an iron core, a connecting rod, a spring I, a grid plate, a lever, a rotating support and a spring II, wherein the cavity is 2, the mounting flange is 3, the high-current stud is 4, the low-current stud is 5, the moving driving assembly is 6, the moving contact is 7, the fixed contact is 8.

Detailed Description

The invention is further described with reference to the accompanying drawings and the detailed description.

As shown in the figures 1 and 2, respectively, in the embodiment shown in fig. 3, a fully-sealed contactor includes a housing 1, a cavity 2 is provided in the housing 1, one end of the housing 1 is provided with a mounting flange 3, the other end of the housing 1 is provided with two high-current studs 4 and two low-current studs 5, a moving driving assembly 6 is provided in the cavity 2, the moving driving assembly 6 is provided with two moving contacts 7 corresponding to the high-current studs 4, one end of each of the high-current studs 4 and one end of each of the low-current studs 5 are both located outside the housing 1, the other end of each of the high-current studs 4 and the other end of each of the low-current studs 5 both penetrate through the housing 1 and are located in the cavity 2, one end of each of the high-current studs 4 located in the cavity 2 is provided with a stationary contact 8 matched with the moving contacts 7, one end of each of the low-current studs 5 located in the cavity 2 is electrically.

As shown in fig. 2, 3 and 4, two reinforcing plates 9 corresponding to the high-current studs 4 one by one are arranged in the cavity 2, and the reinforcing plates 9 are located at one end of the casing 1 where the two high-current studs 4 and the two low-current studs 5 are arranged, and are located on the side surfaces of the high-current studs 4. The connecting surfaces of the high current stud 4 and the low current stud 5 and the shell 1 are respectively provided with a plurality of shaft shoulders 10 with different diameters. The high-current stud 4 is made of copper, and the low-current stud 5 is made of iron.

As shown in fig. 2 and 3, the moving driving assembly 6 includes an iron sheet 11, an electromagnetic coil 12 and a connecting sheet 13, the iron sheet 11 is fixedly connected with the side wall of the cavity 2, one side of the iron sheet 11 is provided with two arc extinguishing devices 14 corresponding to the positions of the static contacts 8, the electromagnetic coil 12 is located at the other side of the iron sheet 11, the arc extinguishing devices 14 are installed at one ends close to the high-current stud 4 and the low-current stud 5, the electromagnetic coil 12 is installed at one end far away from the high-current stud 4 and the low-current stud 5, an iron core 15 is arranged in the electromagnetic coil 12, the iron core 15 is slidably connected with the electromagnetic coil 12, the iron core 15 is provided with a connecting rod 16, one end of the connecting rod 16 is fixedly connected with the iron core 15, the other end of the connecting rod 16 penetrates through the iron sheet 11 and is fixedly connected with the connecting, one end of the first spring 17 is fixedly connected with the connecting sheet 13, and the other end of the first spring 17 is fixedly connected with the iron sheet 11.

As shown in fig. 4, one of the low current studs 5 is electrically connected to the positive pole of the electromagnetic coil 12, and the other low current stud 5 is electrically connected to the negative pole of the electromagnetic coil 12.

As shown in fig. 2 and 3, the arc extinguishing device 14 includes a grid plate 18 and a lever 19, a rotating bracket 20 is disposed on a side wall of the cavity 2, a rotating shaft is disposed on the lever 19, the lever 19 is rotatably connected to the rotating bracket 20 through the rotating shaft, the grid plate 18 is fixedly connected to an end of the lever 19, the grid plate 18 is located between the movable contact 7 and the stationary contact 8, a second spring 21 is disposed at one end of the lever 19 where the grid plate 18 is mounted, one end of the second spring 21 is connected to the side wall of the cavity 2, and the other end of the second spring 21 is connected to the lever 19.

The working principle is as follows: the high-current stud 4 and the low-current stud 5 are integrated with the shell 1 through injection molding, and shaft shoulders 10 with different diameters are arranged on the connecting surfaces of the high-current stud 4, the low-current stud 5 and the shell 1, so that the sealing performance between the high-current stud 4 and the shell 1 and between the low-current stud 5 and the shell 1 is improved, and contacts are not easy to ablate.

The contact of the contactor is in a normally open state, the electromagnetic coil 12 generates a magnetic field after being electrified through the low-current stud 5, the magnetic field magnetizes the iron core 15, the iron core 15 generates suction force with the upper iron sheet 11 after being magnetized, after the suction force overcomes the spring force of the first spring 17, the iron core 15 drives the connecting sheet 13 to move upwards through the connecting rod 16, at the moment, the second spring 21 contracts to drive the grid plate 18 to reset, and the moving contact 7 on the connecting sheet 13 is convenient to be in contact communication with the static contact 8 on the high-current stud 4; when the electromagnetic coil 12 is powered off, the magnetism of the iron core 15 disappears, the first spring 17 enables the iron core 15 and the connecting sheet 13 to reset, the two contacts are disconnected, two ends of the connecting sheet 13 are in contact with the lever 19, the connecting sheet 13 and the grid plate 18 are respectively positioned on two sides of the rotating support 20, the second spring 21 is stretched according to the lever principle, and the grid plate 18 moves between the movable contact 7 and the static contact 8 to play a role in arc extinction and prevent the contact from being ablated.

Claims

1. A fully-sealed contactor is characterized by comprising a shell (1), wherein a cavity (2) is arranged in the shell (1), one end of the shell (1) is provided with a mounting flange (3), the other end of the shell (1) is provided with two high-current studs (4) and two low-current studs (5), a movable driving assembly (6) is arranged in the cavity (2), the movable driving assembly (6) is provided with two movable contacts (7) corresponding to the high-current studs (4), one ends of the high-current studs (4) and one ends of the low-current studs (5) are both positioned outside the shell (1), the other ends of the high-current studs (4) and the low-current studs (5) penetrate through the shell (1) and are positioned in the cavity (2), one end of the high-current studs (4) positioned in the cavity (2) is provided with a fixed contact (8) matched with the movable contacts (7), the low current stud (5) is located one end in cavity (2) and is connected with removal drive assembly (6) electricity, high current stud (4) and low current stud (5) all form an organic whole through moulding plastics with casing (1).

2. A totally enclosed contactor according to claim 1, characterized in that two reinforcing plates (9) are provided in said cavity (2) in one-to-one correspondence with the high current studs (4), said reinforcing plates (9) being located at one end of the housing (1) where the two high current studs (4) and the two low current studs (5) are provided, and being located at the side of the high current studs (4).

3. A totally enclosed contactor according to claim 1 or 2, characterized in that the high current stud (4) and the low current stud (5) are provided with shoulders (10) of different diameters on the connecting surfaces with the housing (1).

4. A contactor of the type as claimed in claim 1 or 2, characterized in that the high current stud (4) is made of copper and the low current stud (5) is made of iron.

5. The fully-sealed contactor according to claim 1, wherein the moving driving assembly (6) comprises an iron sheet (11), an electromagnetic coil (12) and a connecting sheet (13), the iron sheet (11) is fixedly connected with the side wall of the cavity (2), one side of the iron sheet (11) is provided with two arc extinguishing devices (14) corresponding to the positions of the static contacts (8), the electromagnetic coil (12) is positioned at the other side of the iron sheet (11), the arc extinguishing devices (14) are arranged at one ends close to the high-current stud (4) and the low-current stud (5), the electromagnetic coil (12) is arranged at one end far away from the high-current stud (4) and the low-current stud (5), an iron core (15) is arranged in the electromagnetic coil (12), the iron core (15) is connected with the electromagnetic coil (12) in a sliding manner, the iron core (15) is provided with a connecting rod (16), the iron sheet fixing device is characterized in that one end of the connecting rod (16) is fixedly connected with the iron core (15), the other end of the connecting rod (16) penetrates through the iron sheet (11) and is fixedly connected with the connecting sheet (13), the connecting rod (16) is connected with the iron sheet (11) in a sliding mode, the moving contact (7) is installed on the connecting sheet (13), the connecting rod (16) is sleeved with a first spring (17), one end of the first spring (17) is fixedly connected with the connecting sheet (13), and the other end of the first spring (17) is fixedly connected with the iron sheet (11).

6. The totally enclosed contactor according to claim 5, wherein one of the low current studs (5) is electrically connected to the positive pole of the electromagnetic coil (12) and the other low current stud (5) is electrically connected to the negative pole of the electromagnetic coil (12).

7. The fully-sealed contactor according to claim 5 or 6, wherein the arc extinguishing device (14) comprises a grid plate (18) and a lever (19), a rotating support (20) is arranged on the side wall of the cavity (2), a rotating shaft is arranged on the lever (19), the lever (19) is rotatably connected with the rotating support (20) through the rotating shaft, the grid plate (18) is fixedly connected with the end portion of the lever (19), the grid plate (18) is located between the movable contact (7) and the fixed contact (8), a second spring (21) is arranged at one end of the lever (19) where the grid plate (18) is installed, one end of the second spring (21) is connected with the side wall of the cavity (2), and the other end of the second spring (21) is connected with the lever (19).