阅读说明：本技术 直流接触器辅助机构 (DC contactor auxiliary mechanism ) 是由 邱广庭 彭涛 文艳慧 顾春朋 于 2020-06-24 设计创作，主要内容包括：本发明公开了一种直流接触器辅助机构,直流接触器包括灭弧腔和设置于灭弧腔外的驱动线圈,该辅助机构包括一弹性安装于灭弧腔外壁上的第一永磁铁和一亦安装于灭弧腔外壁上的信号输出件,且在驱动线圈处于未通电状态或者通电状态时,第一永磁铁能够相应与信号输出件相接触或者断开接触,进而使得信号输出件相应处于导通状态或者断开状态。该直流接触器辅助机构的结构简单、新颖、合理,工作时的安全性、精准性和稳定性高,且使用寿命长。(The invention discloses an auxiliary mechanism of a direct current contactor, wherein the direct current contactor comprises an arc extinguishing cavity and a driving coil arranged outside the arc extinguishing cavity, the auxiliary mechanism comprises a first permanent magnet and a signal output piece, the first permanent magnet is elastically arranged on the outer wall of the arc extinguishing cavity, the signal output piece is also arranged on the outer wall of the arc extinguishing cavity, and when the driving coil is in an unpowered state or a powered state, the first permanent magnet can be correspondingly contacted with or disconnected from the signal output piece, so that the signal output piece is correspondingly in a conducting state or a disconnected state. The direct current contactor auxiliary mechanism is simple, novel and reasonable in structure, high in safety, accuracy and stability during working, and long in service life.)

1. The utility model provides a direct current contactor complementary unit, direct current contactor include arc-extinguishing chamber (1) and set up in the outer drive coil in arc-extinguishing chamber (1), its characterized in that: the auxiliary mechanism comprises a first permanent magnet (20) and a signal output piece (21), wherein the first permanent magnet is elastically installed on the outer wall of the arc extinguishing chamber (1), the signal output piece (21) is also installed on the outer wall of the arc extinguishing chamber (1), and when the driving coil is in an unpowered state or a powered state, the first permanent magnet (20) can be correspondingly contacted with or disconnected from the signal output piece (21), so that the signal output piece (21) is correspondingly in a conducting state or a disconnecting state.

2. The dc contactor assist mechanism of claim 1, wherein: the arc extinguishing chamber is provided with a ceramic tube (10), a magnetic pole plate (11) and a connecting ring (12), wherein the ceramic tube (10) is of a hollow cylinder structure with an open lower side, and the magnetic pole plate (11) is hermetically and fixedly connected to the lower side of the ceramic tube (10) through the connecting ring (12), namely the ceramic tube (10), the magnetic pole plate (11) and the connecting ring (12) jointly enclose the arc extinguishing chamber (1);

in addition, a mounting groove which extends vertically and is opened on the top surface of the ceramic tube (10) is arranged on the outer wall of the ceramic tube, the first permanent magnet (20) is elastically mounted in the mounting groove, the signal output part (21) is provided with two soft copper sheets, the two soft copper sheets are vertically and fixedly mounted in the mounting groove, meanwhile, the lower ends of the two soft copper sheets also extend below the first permanent magnet (20), and the upper ends of the two soft copper sheets also extend out of the upper opening of the mounting groove to serve as signal output ends;

when the driving coil is in a non-electrified state, the first permanent magnet (20) can elastically abut against the lower ends of the two soft copper sheets so as to enable the two soft copper sheets to be communicated; and when the driving coil is in a power-on state, the first permanent magnet (20) can be disconnected with the lower ends of the two soft copper sheets, so that the two soft copper sheets are disconnected.

3. The dc contactor assist mechanism of claim 2, wherein: the structure for realizing that the first permanent magnet (20) is elastically installed in the installation groove is as follows: the auxiliary mechanism further comprises an installation block (22), a limiting block (23), a spring (24) and a stop sheet, wherein the installation block (22) is embedded in the installation groove in a tight fit manner, an installation gap for movably installing the first permanent magnet (20) is further formed between one side of the installation block (22) and the inner wall of the installation groove, the limiting block (23) is installed in the installation gap in a tight fit manner, the limiting block (23) is also arranged above the first permanent magnet (20), the spring (24) is arranged between the limiting block (23) and the first permanent magnet (20), the upper end and the lower end of the spring (24) are correspondingly positioned and connected with the lower side of the limiting block (23) and the upper side of the first permanent magnet (20) respectively, namely the spring (24) provides downward elasticity for the first permanent magnet (20), so that the first permanent magnet (20) can elastically press against the lower ends of the two soft copper sheets when the driving coil is in a non-electrified state; the stop piece is positioned and arranged at the upper opening of the mounting groove so as to stop and limit the mounting block (22) and the limiting block (23);

realize two the equal vertical and location of soft copper sheet install the structure in the mounting groove does: two slots which respectively extend along the vertical direction are arranged on the mounting block (22), and the two soft copper sheets are respectively and correspondingly inserted into the two slots.

4. The dc contactor assist mechanism of claim 3, wherein: the two soft copper sheets are respectively provided with a copper sheet A (210) which is vertically arranged and is in an inverted L shape and a copper sheet B (211) which is transversely arranged and is in an L shape, wherein the two copper sheets A (210) are correspondingly inserted into the two slots respectively, and the upper sides of the two copper sheets A (210) extend out of the upper opening of the mounting slot to be used as signal output ends; one ends of the two copper sheets B (211) are respectively and correspondingly connected with the bottom ends of the two copper sheets A (210) in an integrated mode, the other ends of the two copper sheets B (211) extend below the first permanent magnet (20), and when the driving coil is in a non-electrified state, the other ends of the two copper sheets B (211) are respectively in contact with the first permanent magnet (20).

5. The dc contactor assist mechanism of claim 2, wherein: the structure for realizing that the first permanent magnet (20) can be respectively disconnected with the lower ends of the two soft copper sheets is as follows: the direct current contactor also comprises a movable iron core (3) movably arranged in a space enclosed by the driving coils and a push rod (4) vertically arranged, the lower end of the push rod (4) is tightly matched and inserted in the movable iron core (3), and the upper end of the push rod (4) is movably inserted in the arc extinguishing cavity (1); the auxiliary mechanism further comprises a second permanent magnet (25), the second permanent magnet (25) is arranged in the arc extinguishing chamber (1) and is connected with the upper end of the push rod (4) in a positioning mode, the second permanent magnet (25) is also arranged opposite to the first permanent magnet (20), and the polarity of the two opposite side faces of the second permanent magnet (25) and the first permanent magnet (20) is the same;

when the driving coil is in a power-on state, the second permanent magnet (25) can move upwards along with the push rod (4), and at the moment, the first permanent magnet (20) can move upwards elastically under the action of a repulsive force generated between the first permanent magnet and the second permanent magnet (25) so as to be disconnected from the lower ends of the two soft copper sheets.

6. The dc contactor assist mechanism of claim 5, wherein: the structure for realizing the positioning connection of the second permanent magnet (25) and the upper end of the push rod (4) is as follows: the auxiliary mechanism further comprises a connecting block (26) which is made of plastic materials and is fixedly connected to the upper end of the push rod (4), and the second permanent magnet (25) is positioned and embedded on the connecting block (26).

Technical Field

The invention relates to the technical field of direct current contactors, and particularly provides an auxiliary mechanism of a direct current contactor.

Background

In order to judge the working state of the contactor, if the on-off signal is directly collected from the main contact loop and belongs to high-voltage work, the safety consideration has a large risk. And through increasing auxiliary contact mechanism in the contactor, then can avoid high-pressure detection problem, security when improving the product and using.

Because of the sealing design of the direct current contactor, the contactors on the market almost completely seal the auxiliary contact mechanism inside the ceramic cavity, but the adoption of the design mode has the following defects: firstly, arc ablation substances generated in the process of opening and closing a main contact of the contactor fall on an auxiliary contact mechanism, so that the service life of the auxiliary contact mechanism is influenced; secondly, the auxiliary contact mechanism is arranged in the ceramic cavity, so that the risk of being ablated by electric arc exists; and thirdly, when the auxiliary contact mechanism outputs the on-off signal, a welding point needs to be added outside the ceramic shell, so that the risk of welding and air leakage of the product is increased.

In view of the above, the present invention is particularly proposed.

Disclosure of Invention

In order to overcome the defects, the invention provides an auxiliary mechanism of a direct current contactor, which is simple, novel and reasonable in structure, high in safety, accuracy and stability during working and long in service life.

The technical scheme adopted by the invention for solving the technical problem is as follows: the direct current contactor auxiliary mechanism comprises an arc extinguishing cavity and a driving coil arranged outside the arc extinguishing cavity, the auxiliary mechanism comprises a first permanent magnet and a signal output piece, the first permanent magnet is elastically installed on the outer wall of the arc extinguishing cavity, the signal output piece is also installed on the outer wall of the arc extinguishing cavity, and when the driving coil is in an unpowered state or a powered state, the first permanent magnet can be correspondingly contacted with or disconnected from the signal output piece, so that the signal output piece is correspondingly in a conducting state or a disconnected state.

As a further improvement of the invention, the arc extinguishing chamber is provided with a ceramic tube, a magnetic pole plate and a connecting ring, wherein the ceramic tube is of a hollow cylinder structure with an open lower side, and the magnetic pole plate is sealed and fixedly connected to the lower side of the ceramic tube through the connecting ring, namely the ceramic tube, the magnetic pole plate and the connecting ring jointly surround the arc extinguishing chamber;

in addition, a mounting groove which extends vertically and is opened on the top surface of the ceramic tube is arranged on the outer wall of the ceramic tube, the first permanent magnet is elastically mounted in the mounting groove, the signal output part is provided with two soft copper sheets, the two soft copper sheets are vertically and fixedly mounted in the mounting groove, meanwhile, the lower ends of the two soft copper sheets also extend below the first permanent magnet, and the upper ends of the two soft copper sheets also extend out of the upper opening of the mounting groove to serve as a signal output end;

when the driving coil is in a non-electrified state, the first permanent magnet can elastically abut against the lower ends of the two soft copper sheets so as to enable the two soft copper sheets to be communicated; and when the driving coil is in a power-on state, the first permanent magnet can be disconnected with the lower ends of the two soft copper sheets, so that the two soft copper sheets are disconnected.

As a further improvement of the present invention, the structure for elastically mounting the first permanent magnet in the mounting groove is: the auxiliary mechanism further comprises an installation block, a limiting block, a spring and a stopping sheet, wherein the installation block is embedded in the installation groove in a close fit manner, an installation gap for movably installing the first permanent magnet is formed between one side of the installation block and the inner wall of the installation groove, the limiting block is installed in the installation gap in a close fit manner, the limiting block is also arranged above the first permanent magnet, the spring is arranged between the limiting block and the first permanent magnet, the upper end and the lower end of the spring are respectively and correspondingly positioned and connected with the lower side of the limiting block and the upper side of the first permanent magnet, namely the spring provides downward elastic force for the first permanent magnet, so that the first permanent magnet can be elastically abutted against the lower ends of the two soft copper sheets when the driving coil is in a non-electrified state; the stop piece is positioned and arranged at the upper opening of the mounting groove so as to stop and limit the mounting block and the limiting block;

realize two the equal vertical and location of soft copper sheet install the structure in the mounting groove does: two slots which respectively extend along the vertical direction are arranged on the mounting block, and the two soft copper sheets are respectively and correspondingly inserted into the two slots.

As a further improvement of the invention, each of the two soft copper sheets has a vertically arranged and inverted L-shaped copper sheet a and a horizontally arranged and L-shaped copper sheet B, wherein the two copper sheets a are respectively and correspondingly inserted into the two slots, and the upper sides of the two copper sheets a also extend out of the upper opening of the mounting slot to serve as signal output ends; one ends of the two copper sheets B are respectively and correspondingly connected with the bottom ends of the two copper sheets A into a whole, the other ends of the two copper sheets B are respectively extended below the first permanent magnet, and when the driving coil is in a non-electrified state, the other ends of the two copper sheets B are respectively in contact with the first permanent magnet.

As a further improvement of the present invention, a structure that the first permanent magnet can be respectively disconnected from the lower ends of the two soft copper sheets is implemented as follows: the direct current contactor also comprises a movable iron core movably arranged in a space enclosed by the driving coils and a push rod vertically arranged, the lower end of the push rod is tightly matched and inserted in the movable iron core, and the upper end of the push rod is movably inserted in the arc extinguishing cavity; the auxiliary mechanism also comprises a second permanent magnet, the second permanent magnet is arranged in the arc extinguishing chamber and is connected with the upper end of the push rod in a positioning way, the second permanent magnet is also arranged opposite to the first permanent magnet, and the polarity of the two opposite side surfaces of the second permanent magnet and the first permanent magnet is the same;

therefore, when the driving coil is in a power-on state, the second permanent magnet can move upwards along with the push rod, and at the moment, the first permanent magnet can elastically move upwards under the action of a repulsive force generated between the first permanent magnet and the second permanent magnet, so that the first permanent magnet is disconnected from the lower ends of the two soft copper sheets.

As a further improvement of the present invention, the structure for realizing the positioning connection between the second permanent magnet and the upper end of the push rod is: the auxiliary mechanism further comprises a connecting block which is made of plastic materials and is fixedly connected to the upper end of the push rod, and the second permanent magnet is positioned and embedded on the connecting block.

The invention has the beneficial effects that: on one hand, the auxiliary mechanism of the direct current contactor can accurately judge the connection and disconnection states of the contact mechanism, so that the stability of the direct current contactor during working is greatly improved; on the other hand, most parts of the auxiliary mechanism are arranged outside the arc extinguishing cavity, so that the adverse effect of electric arcs on the auxiliary mechanism can be effectively reduced, the safety, the accuracy and the stability of the auxiliary mechanism during working are improved, and the service life of the auxiliary mechanism is prolonged.

Drawings

Fig. 1 is a schematic partial perspective view of a dc contactor equipped with the auxiliary mechanism of the present invention;

FIG. 2 is a schematic top view of the DC contactor shown in FIG. 1;

FIG. 3 is a schematic view of the cross-sectional structure A-A shown in FIG. 2;

FIG. 4 is a schematic view of the auxiliary mechanism of the present invention in an operating state when the drive coil is not energized;

fig. 5 is a schematic view of the auxiliary mechanism according to the present invention in an operating state when the driving coil is in a power-on state;

fig. 6 is a schematic structural diagram of the soft copper sheet according to the present invention.

The following description is made with reference to the accompanying drawings:

1-arc extinguishing chamber; 10-a ceramic tube; 11-a magnetic pole plate; 12-a connecting ring; 20-a first permanent magnet; 21-signal output element; 210-copper sheet A; 211-copper sheet B; 22-mounting block; 23, a limiting block; 24-a spring; 25-a second permanent magnet; 26, connecting blocks; 3, a movable iron core; 4-push rod.

Detailed Description

The following description of the embodiments of the present invention is provided by way of specific embodiments, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein.

It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions of the present invention, so that the present invention has no technical significance. The terms "first", "second", "a" and "B" used herein are for the sake of clarity only, and are not intended to limit the scope of the present invention.