CN214956653U

CN214956653U - Electromagnetic driving mechanism of low-power-consumption direct-current contactor

Info

Publication number: CN214956653U
Application number: CN202120691039.8U
Authority: CN
Inventors: 不公告发明人
Original assignee: Suzhou Anlaiqiang Electronic Technology Co ltd
Current assignee: Suzhou Anlaiqiang Electronic Technology Co ltd
Priority date: 2021-04-06
Filing date: 2021-04-06
Publication date: 2021-11-30
Anticipated expiration: 2031-04-06

Abstract

The utility model discloses a low-power consumption direct current contactor electromagnetic drive mechanism, include: the coil and the movable iron core are all installed in the yoke shell, the coil is sleeved on the outer side of the movable iron core, a magnetic field generated by energization of the coil can drive the movable iron core to move upwards, a permanent magnet is sleeved on the coil, and the direction of the magnetic field generated by the permanent magnet is the same as that of the magnetic field generated by energization of the coil. The utility model relates to a low-power consumption direct current contactor electromagnetic drive mechanism realizes increasing extra electromagnetic force to moving the iron core, satisfies actuating mechanism and provides bigger electromagnetic force to guarantee the contact reliability of contact, need not to increase the coil number of turns or increase circular telegram current, can not increase the volume and the consumption of coil yet, reach the purpose that reduces consumption, energy saving.

Description

Electromagnetic driving mechanism of low-power-consumption direct-current contactor

Technical Field

The utility model relates to a direct current contactor field, in particular to low-power consumption direct current contactor electromagnetic drive mechanism.

Background

At present, for a contactor product with a large specification, because the current passing through the contact is large, an electric repulsion force is generated on the movable contact piece by a magnetic field generated by the contact, and in order to overcome the influence of the electric repulsion force and reduce the bounce of the movable contact piece, the pressure of a contact spring is generally increased in the prior art. By adopting the technical means, the coil needs to generate larger magnetic force to overcome the force of the contact spring, namely, the number of turns of the coil is increased or the current of the coil is increased, the more the number of turns of the coil is, the larger the energizing current is, the larger the generated electromagnetic force is, and the more reliable the electromagnetic switch-on is.

However, the technical means have certain defects: increasing the number of turns of the coil results in an oversized product and waste of material; the increase coil circular telegram electric current will make the temperature rise of coil uprise, leads to the product to generate heat seriously, can't satisfy the user demand, and can't accomplish real energy-conservation. Accordingly, there is a need for improvements in the art that overcome the deficiencies in the prior art.

Disclosure of Invention

The utility model aims to solve the problem that a low-power consumption direct current contactor electromagnetic drive mechanism is provided, can need not increase coil number of turns and circular telegram electric current, satisfy actuating mechanism and provide bigger electromagnetic force, guarantee the contact reliability of contact.

The utility model discloses a solve the technical scheme that its technical problem adopted and be: a low-power consumption DC contactor electromagnetic drive mechanism, comprising: the coil and the movable iron core are all installed in the yoke shell, the coil is sleeved on the outer side of the movable iron core, a magnetic field generated by energization of the coil can drive the movable iron core to move upwards, a permanent magnet is sleeved on the coil, and the direction of the magnetic field generated by the permanent magnet is the same as that of the magnetic field generated by energization of the coil.

As a further improvement of the present invention, the permanent magnet is a magnetic ring fitted outside the coil.

As a further improvement of the utility model, the permanent magnet adopts split type structure.

As a further improvement of the present invention, the permanent magnet includes two symmetrical semi-ring magnets.

As a further improvement, the yoke shell is internally and fixedly provided with a coil rack, the coil is wound on the coil rack, the coil rack is provided with a holding channel along the central line, and the movable iron core is movably arranged in the holding channel.

As a further improvement of the present invention, the movable iron core outside and the accommodating channel inner wall are sleeved with a flux sleeve.

As a further improvement, the coil rack is followed the holding channel inner wall is provided with annular boss, move the iron core upper end and extend along the outside and form a spacing step, spacing step downside supports to arrange in on the annular boss.

As a further improvement, the yoke shell is internally provided with a magnetic conductive plate, the magnetic conductive plate is tightly pressed on the top of the coil frame, a push rod is fixed on the movable iron core, the top of the push rod is run through the magnetic conductive plate and is provided with a movable contact spring, the push rod is sleeved with a reset spring, and the lower end of the reset spring is elastically supported on the movable iron core.

As a further improvement of the utility model, the upper end of the permanent magnet is the S pole and the lower end is the N pole.

The utility model has the advantages that: the utility model provides a low-power consumption direct current contactor electromagnetic drive mechanism, be equipped with the permanent magnet through the outside cover at the coil, and the magnetic field direction that the permanent magnet produced is the same with the magnetic field direction that the coil circular telegram produced, and then realize increasing extra electromagnetic force to moving the iron core, satisfy actuating mechanism and provide bigger electromagnetic force, thereby guarantee the contact reliability of contact, need not to increase the coil number of turns or increase circular telegram current, can not increase the volume and the consumption of coil yet, reach the mesh that reduces the consumption, the energy saving.

Drawings

Fig. 1 is a schematic cross-sectional view of the present invention;

fig. 2 is a schematic cross-sectional view of the coil, permanent magnet and coil former of the present invention;

FIG. 3 is a schematic cross-sectional view of the coil of the present invention after being energized to generate a magnetic field;

FIG. 4 is a perspective view of the permanent magnet of the present invention;

wherein the direction indicated by the arrow in fig. 3 is the direction of the magnetic field.

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

1-yoke shell; 2-coil;

3-movable iron core; 301-limiting step;

4-permanent magnet; 401-half-ring magnet;

5-coil rack; 501-accommodating channel;

502-annular boss; 6-magnetic conductive sleeve;

7-magnetic conductive plate; 8-push rod;

9-moving contact piece; 10-return spring.

Detailed Description

The following description of the preferred embodiments of the present invention will be made in conjunction with the accompanying drawings.

Referring to fig. 1 to 4, the utility model provides a low-power consumption direct current contactor electromagnetic drive mechanism, include: yoke casing 1, coil 2 and move iron core 3, yoke casing 1 is the top end opening form, and bottom fixed mounting has coil former 5 in yoke casing 1, and coil 2 also all installs in yoke casing 1 with moving iron core 3, and coil 2 twines on coil former 5 and the suit moves the iron core 3 outside. The coil rack 5 is provided with a vertical accommodating channel 501 along the central line, the movable iron core 3 is movably arranged in the accommodating channel 501, and the movable iron core 3 can move up and down in the accommodating channel 501.

Referring to fig. 1, a magnetic conductive plate 7 is further installed in the yoke housing 1, and the magnetic conductive plate 7 is tightly pressed against the top of the coil rack 5. A push rod 8 is fixed on the movable iron core 3, a through hole is arranged on the magnetic conduction plate 7, and the top of the push rod 8 penetrates through the through hole of the magnetic conduction plate 7 and is provided with a movable contact spring 9. The top of the magnetic conduction plate 7 is provided with a fixed support, the fixed support extends into the through hole, the push rod 8 is sleeved with a return spring 10, the upper end of the return spring 10 elastically abuts against the part of the fixed support extending into the through hole, the lower end of the return spring 10 elastically abuts against the movable iron core 3, the return spring 10 always has downward elasticity on the movable iron core 3, and after the coil 2 is powered off, the movable iron core 3 is driven to move downwards. And the push rod 8 is also sleeved with a contact spring, the upper end of the contact spring is elastically abutted against the bottom of the movable contact spring 9, the lower end of the contact spring is elastically abutted against the step of the push rod 8, and the contact spring has upward elastic force to the movable contact spring 9, so that the movable contact spring 9 can be prevented from bouncing under the action of electric repulsion.

Referring to fig. 1 and 2, the coil frame 5 is provided with an annular boss 502 along the inner wall of the accommodating channel 501, the upper end of the movable iron core 3 extends along the outer side to form a limiting step 301, and the lower side surface of the limiting step 301 abuts against the annular boss 502. By adopting the structural design, when the movable iron core 3 is released, the limiting step 301 on the movable iron core is blocked by the annular boss 502, so that the movable iron core 3 can be effectively prevented from deforming due to the bottom impact of the yoke shell 1.

Referring to fig. 3, a flux sleeve 6 is sleeved between the outer side of the movable iron core 3 and the inner wall of the accommodating channel 501. After the coil 2 is electrified, the direction of a magnetic field generated by the electrified coil 2 can be judged according to the right-hand spiral rule, the movable iron core 3 moves upwards under the action of the magnetic field, and the movable contact piece 9 is driven by the push rod 8 to move upwards to be in contact with and conducted with the static contact, so that the closing is realized. The permanent magnet 4 is sleeved on the outer side of the coil 2, the permanent magnet 4 is a magnetic ring, the upper end of the permanent magnet 4 is an S pole, the lower end of the permanent magnet 4 is an N pole, the direction of a magnetic field generated by the permanent magnet is the same as the direction of a magnetic field generated by electrifying the coil 2, additional electromagnetic force is further added to the movable iron core 3, the requirement that a driving mechanism provides larger electromagnetic force is met, the contact reliability of a contact is guaranteed, the number of turns of the coil 2 or the electrifying current is not required to be increased, the volume and the power consumption of the coil are not increased, and energy conservation is achieved.

Referring to fig. 4, the permanent magnet 4 has a split structure, and includes two symmetric half-ring magnets 401, which can be conveniently installed.

The working principle of the embodiment is as follows: after the coil 2 is electrified, the movable iron core 3 moves upwards under the combined action of the electromagnetic force generated by the coil 2 and the electromagnetic force generated by the permanent magnet 4, the movable contact piece 9 is driven by the push rod 8 to move upwards until the static contact is closed to contact with the movable contact piece 9, and the current is conducted; after the coil 2 is powered off, the electromagnetic force generated by the coil 2 disappears, and the movable iron core 3 is released under the action of the return spring 10 and moves downwards to realize disconnection.

Therefore, the utility model relates to a low-power consumption direct current contactor electromagnetic drive mechanism, through the outside cover at the coil be equipped with the permanent magnet, and the magnetic field direction that the permanent magnet produced is the same with the magnetic field direction that the coil circular telegram produced, and then realize increasing extra electromagnetic force to moving the iron core, satisfy actuating mechanism and provide bigger electromagnetic force, thereby guarantee the contact reliability of contact, need not to increase the coil number of turns or increase circular telegram current, can not increase the volume and the consumption of coil yet, reach the mesh that reduces the consumption, the energy saving.

In the previous description, numerous specific details were set forth in order to provide a thorough understanding of the invention. The foregoing description is only illustrative of the preferred embodiments of the invention, which can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. All the contents that do not depart from the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention all still belong to the protection scope of the technical solution of the present invention.

Claims

1. A low-power consumption direct current contactor electromagnetic drive mechanism, its characterized in that includes: yoke casing (1), coil (2) and move iron core (3), coil (2) with move iron core (3) and all install in yoke casing (1), just coil (2) suit is in move the iron core (3) outside, the magnetic field that coil (2) circular telegram produced can drive move iron core (3) rebound, the cover is equipped with permanent magnet (4) on coil (2), the magnetic field direction that permanent magnet (4) produced with the magnetic field direction that coil (2) circular telegram produced is the same.

2. The low-power-consumption direct current contactor electromagnetic driving mechanism according to claim 1, characterized in that: the permanent magnet (4) is a magnetic ring sleeved on the outer side of the coil (2).

3. The low-power-consumption direct current contactor electromagnetic driving mechanism according to claim 2, characterized in that: the permanent magnet (4) adopts a split structure.

4. The low-power-consumption direct current contactor electromagnetic driving mechanism according to claim 3, characterized in that: the permanent magnet (4) comprises two symmetrical semi-ring magnets (401).

5. The low-power-consumption direct current contactor electromagnetic driving mechanism according to claim 1, characterized in that: the coil rack is characterized in that a coil rack (5) is fixedly mounted in the yoke shell (1), the coil (2) is wound on the coil rack (5), an accommodating channel (501) is formed in the coil rack (5) along the central line, and the movable iron core (3) is movably arranged in the accommodating channel (501).

6. The low-power-consumption direct current contactor electromagnetic driving mechanism according to claim 5, characterized in that: a magnetic sleeve (6) is sleeved between the outer side of the movable iron core (3) and the inner wall of the accommodating channel (501).

7. The low-power-consumption direct current contactor electromagnetic driving mechanism according to claim 5, characterized in that: coil former (5) are followed holding passageway (501) inner wall is provided with annular boss (502), move iron core (3) upper end and extend along the outside and form a spacing step (301), spacing step (301) downside support and put in on annular boss (502).

8. The low-power-consumption direct current contactor electromagnetic driving mechanism according to claim 5, characterized in that: the magnetic conduction coil is characterized in that a magnetic conduction plate (7) is further installed in the yoke shell (1), the magnetic conduction plate (7) tightly presses the top of the coil rack (5), a push rod (8) is fixed on the movable iron core (3), the top of the push rod (8) penetrates through the magnetic conduction plate (7) and is provided with a movable contact spring (9), a reset spring (10) is sleeved on the push rod (8), and the lower end of the reset spring (10) is elastically abutted to the movable iron core (3).

9. The low-power-consumption direct current contactor electromagnetic driving mechanism according to claim 1, characterized in that: the upper end of the permanent magnet (4) is an S pole, and the lower end of the permanent magnet is an N pole.