CN216818229U

CN216818229U - Normally closed contact contactor

Info

Publication number: CN216818229U
Application number: CN202123152319.0U
Authority: CN
Inventors: 谢宪陪
Original assignee: Juen Electrical Shanghai Co ltd
Current assignee: Juen Electrical Shanghai Co ltd
Priority date: 2021-12-15
Filing date: 2021-12-15
Publication date: 2022-06-24
Anticipated expiration: 2031-12-15

Abstract

A normally closed contact contactor comprises a shell, wherein an outer cover is arranged above the shell, an outer iron core is fixedly arranged at the bottom of an inner cavity of the shell, a coil assembly body is fixedly arranged in the inner cavity of the outer iron core, a moving shaft is movably arranged in the middle of the coil assembly body, a coil cover is arranged above the outer iron core, a small shaft is arranged in the middle of the upper surface of the moving shaft, the small shaft penetrates through the coil cover and is provided with a moving contact, and a first spring is sleeved on the outer surface of the small shaft; a static contact is fixedly arranged on the surface of the outer cover; the lower extreme of static contact and the upper surface movable contact of moving contact, the one end of wire is connected to the binding post of the coil assembly body, and the other end of wire passes the enclosing cover and is connected with external power source. The movable contact and the static contact are in a contact state all the time under the action of the first spring, when the coil assembly body is powered on, the moving shaft moves downwards under the action of electromagnetic force, and then the movable contact is driven to move downwards by the small shaft, so that the movable contact and the static contact are separated.

Description

Normally closed contact contactor

Technical Field

The utility model relates to the technical field of contact contactors, in particular to a normally closed contact contactor.

Background

A common contactor in the market is a contact normally-open contactor, the contactor needs to be closed under the condition that a coil is electrified, and the contactor is disconnected after the coil is powered off. And some special operating mode contactors need be in closure state always, just can let the contactor segmentation occasionally, and the general contactor in this kind of condition market need be to coil circular telegram always, extravagant electric energy.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the normally closed contact contactor provided by the utility model overcomes the defects of the prior art, is reasonable in design, enables the lower parts of a movable contact and a static contact to be always in a contact state under the elastic action of a first spring, and when a coil assembly body is electrified, a moving shaft can move downwards under the action of electromagnetic force, and then drives the movable contact to move downwards through a small shaft, so that the movable contact is separated from the static contact; the buffer is performed through the elastic action of the second spring so as to prevent the damage of the equipment caused by overlarge downward moving force of the moving shaft; meanwhile, an upward elastic acting force on the movable shaft after power failure can be ensured under the elastic action of the second spring, so that the movable contact and the fixed contact can be stably contacted and closed when power failure occurs.

In order to achieve the purpose, the utility model is realized by the following technical scheme:

a normally closed contact contactor comprises a shell, wherein an outer cover is fixedly arranged above the shell, an outer iron core is fixedly arranged at the bottom of an inner cavity of the shell, a coil assembly body is fixedly arranged in the inner cavity of the outer iron core, a moving shaft is movably arranged in the middle of the coil assembly body, a coil cover is arranged above the outer iron core, a small shaft is arranged in the middle of the upper surface of the moving shaft, the small shaft penetrates through the coil cover and is fixedly provided with a moving contact, a first spring is sleeved on the outer surface of the small shaft, and the first spring is positioned between the moving contact and the upper surface of the coil cover;

two through holes are formed in the surface of the outer cover, and static contacts are fixedly arranged in the two through holes; the lower end of the static contact is movably contacted with the upper surface of the moving contact, the wiring terminal of the coil assembly body is connected with one end of a wire, and the other end of the wire penetrates through the outer cover and is connected with an external power supply.

Preferably, a placing groove is formed in the lower end of the moving shaft, a second spring is arranged in the placing groove, and the second spring is abutted to the bottom of the inner cavity of the outer iron core.

Preferably, the outer surface of the moving contact is fixedly provided with a convex block, the lower surface of the outer cover is fixedly provided with a circuit board, the input end of the circuit board is fixedly provided with a contact switch, the sensing end of the contact switch corresponds to the upper surface of the convex block, and the output end of the circuit board is connected with an external control system through a wire.

Preferably, a contact cavity is fixedly installed between the lower surface of the outer cover and the upper surface of the coil cover, the moving contact and the static contact are both located in the contact cavity, a conduit groove is formed in the surface of the outer cover, the interior of the conduit groove is communicated with the inner cavity of the contact cavity through a conduit, and a conduit cap is installed on the outer surface of the conduit groove in a sealing mode.

Preferably, a magnet is fixedly mounted on the side surface of the contact chamber.

The utility model provides a normally closed contact contactor. The method has the following beneficial effects: when the coil assembly is electrified, the moving shaft moves downwards under the action of electromagnetic force, and then the moving contact is driven to move downwards through the small shaft, so that the moving contact is separated from the static contact; the buffer is realized through the elastic action of the second spring, so that the damage to the equipment caused by the excessive downward force of the moving shaft is prevented; meanwhile, an upward elastic acting force on the movable shaft after power failure can be ensured under the elastic action of the second spring, so that the movable contact and the fixed contact can be stably contacted and closed when power failure occurs.

Drawings

In order to more clearly illustrate the present invention or the prior art solutions, the drawings that are needed in the description of the prior art will be briefly described below.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an expanded view of the structure of the present invention;

FIG. 3 is a schematic view of the structure above the coil cover of the present invention;

FIG. 4 is a first cross-sectional view of the present invention;

FIG. 5 is a second cross-sectional view of the present invention;

the reference numbers in the figures illustrate:

1. a housing; 2. an outer cover; 3. an outer core; 4. a coil assembly; 5. a movable shaft; 6. a coil cover; 7. a small shaft; 8. a moving contact; 9. a first spring; 10. static contact; 11. a wire; 12. a second spring; 13. a bump; 14. a circuit board; 15. a contact switch; 16. a contact chamber; 17. a catheter cap; 18. and a magnet.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings.

In a first embodiment, as shown in fig. 1 to 5, a normally closed contact contactor includes a housing 1, an outer cover 2 is fixedly installed above the housing 1, an outer iron core 3 is fixedly installed at the bottom of an inner cavity of the housing 1, a coil assembly 4 is fixedly installed in an inner cavity of the outer iron core 3, a movable shaft 5 is movably installed in the middle of the coil assembly 4, a coil cover 6 is arranged above the outer iron core 3, a small shaft 7 is arranged in the middle of the upper surface of the movable shaft 5, the small shaft 7 penetrates through the coil cover 6 and is fixedly installed with a movable contact 8, a first spring 9 is sleeved on the outer surface of the small shaft 7, and the first spring 9 is located between the movable contact 8 and the upper surface of the coil cover 6;

two through holes are formed in the surface of the outer cover 2, and static contacts 10 are fixedly arranged in the two through holes; the lower extreme of static contact 10 and the upper surface movable contact of moving contact 8, the binding post of coil assembly body 4 connects the one end of wire 11, and the other end of wire 11 passes enclosing cover 2 and is connected with external power source.

The working principle is as follows:

when the coil assembly body 4 is electrified through the conducting wire 11, the moving shaft 5 positioned in the middle of the coil assembly body 4 moves downwards under the action of electromagnetic force, then the moving contact 8 is driven by the small shaft 7 to move downwards, the moving contact 8 is separated from the static contact 10, and the moving contact 8 compresses the first spring 9 downwards; when the power is off, the suction force of the moving shaft 5 disappears, and the moving contact 8 moves upwards again under the elastic action of the first spring 9 and is contacted and closed with the static contact 10 again; the coil assembly 4 is separated from the contact chamber by providing the coil cover 6 to prevent mutual influence.

In the second embodiment, as a further preferable mode of the first embodiment, a placing groove is formed at the lower end of the moving shaft 5, a second spring 12 is arranged in the placing groove, and the second spring 12 is abutted against the bottom of the inner cavity of the outer iron core 3. Therefore, when the coil assembly 4 is powered on and the moving shaft 5 moves downwards, the buffer can be realized through the elastic action of the second spring 12, so that the damage to equipment caused by the overlarge downward movement force of the moving shaft 5 can be prevented; meanwhile, an upward elastic acting force on the moving shaft 5 after power failure can be ensured through the elastic action of the second spring 12, so that the moving contact 8 and the static contact 10 can be stably contacted and closed during power failure.

In a third embodiment, as a further preferable solution of the first embodiment, a convex block 13 is fixedly installed on an outer surface of the movable contact 8, a circuit board 14 is fixedly installed on a lower surface of the outer cover 2, a contact switch 15 is fixedly installed on an input end of the circuit board 14, a sensing end of the contact switch 15 corresponds to an upper surface of the convex block 13, and an output end of the circuit board 14 is connected with an external control system through a wire. When power is off, the moving contact 8 is in an upward supporting state under the elastic action of the first spring 9, so that the lug 13 is in contact with the sensing end of the contact switch 15, and after power is on, the moving contact 8 drives the lug 13 to move downwards, so that the sensing end of the contact switch 15 is disconnected, and then a signal is output to an external control system through the circuit board 14, so that a worker can timely make feedback.

In a third embodiment, as a further preferred scheme of the first embodiment, a contact cavity 16 is fixedly installed between the lower surface of the outer cover 2 and the upper surface of the coil cover 6, the moving contact 8 and the static contact 10 are both located in the contact cavity 16, a conduit groove is formed in the surface of the outer cover 2, the interior of the conduit groove is communicated with an inner cavity of the contact cavity 16 through a conduit, and a conduit cap 17 is hermetically installed on the outer surface of the conduit groove. The moving contact 8 and the static contact 10 are isolated from the outside through the contact cavity 16 so as to reduce the influence of electric arcs in work, and the surface of the outer cover 2 is provided with a conduit groove so as to perform a vacuumizing mode on the contact cavity 16 through a conduit in the conduit groove so as to further improve the arc extinguishing capability. In this embodiment, a magnet 18 may be fixedly mounted on a side surface of the contact chamber 16. Therefore, when an arc is generated in operation, the arc can be pulled down by the magnetic force of the magnet 18 to move towards the side of the contact chamber 16, so that the change of the voltage and the current of the arc is accelerated, and the arc is rapidly extinguished.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A normally closed contact contactor, characterized in that: the coil assembly device comprises a shell (1), wherein an outer cover (2) is fixedly installed above the shell (1), an outer iron core (3) is fixedly installed at the bottom of an inner cavity of the shell (1), a coil assembly body (4) is fixedly installed in the inner cavity of the outer iron core (3), a moving shaft (5) is movably installed in the middle of the coil assembly body (4), a coil cover (6) is arranged above the outer iron core (3), a small shaft (7) is arranged in the middle of the upper surface of the moving shaft (5), the small shaft (7) penetrates through the coil cover (6) and is fixedly provided with a moving contact (8), a first spring (9) is sleeved on the outer surface of the small shaft (7), and the first spring (9) is located between the moving contact (8) and the upper surface of the coil cover (6);

two through holes are formed in the surface of the outer cover (2), and static contacts (10) are fixedly mounted in the two through holes; the lower end of the static contact (10) is movably contacted with the upper surface of the moving contact (8), the wiring terminal of the coil assembly body (4) is connected with one end of a wire (11), and the other end of the wire (11) penetrates through the outer cover (2) and is connected with an external power supply.

2. The normally closed contact contactor as claimed in claim 1, wherein: the lower end of the moving shaft (5) is provided with a placing groove, a second spring (12) is arranged in the placing groove, and the second spring (12) is abutted to the bottom of the inner cavity of the outer iron core (3).

3. The normally closed contact contactor according to claim 1, wherein: the outer surface of the moving contact (8) is fixedly provided with a convex block (13), the lower surface of the outer cover (2) is fixedly provided with a circuit board (14), the input end of the circuit board (14) is fixedly provided with a contact switch (15), the sensing end of the contact switch (15) corresponds to the upper surface of the convex block (13), and the output end of the circuit board (14) is connected with an external control system through a wire.

4. The normally closed contact contactor as claimed in claim 1, wherein: a contact cavity (16) is fixedly installed between the lower surface of the outer cover (2) and the upper surface of the coil cover (6), the moving contact (8) and the static contact (10) are both located in the contact cavity (16), a conduit groove is formed in the surface of the outer cover (2), the conduit groove is communicated with an inner cavity of the contact cavity (16) through a conduit, and a conduit cap (17) is installed on the outer surface of the conduit groove in a sealing mode.

5. The normally closed contact contactor as claimed in claim 4, wherein: and a magnet (18) is fixedly arranged on the side surface of the contact cavity (16).